WO2012014461A1 - Procédé de codage et procédé de décodage - Google Patents

Procédé de codage et procédé de décodage Download PDF

Info

Publication number
WO2012014461A1
WO2012014461A1 PCT/JP2011/004234 JP2011004234W WO2012014461A1 WO 2012014461 A1 WO2012014461 A1 WO 2012014461A1 JP 2011004234 W JP2011004234 W JP 2011004234W WO 2012014461 A1 WO2012014461 A1 WO 2012014461A1
Authority
WO
WIPO (PCT)
Prior art keywords
conversion
transformation
matrix
transformation matrix
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/004234
Other languages
English (en)
Japanese (ja)
Inventor
陽司 柴原
孝啓 西
寿郎 笹井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of WO2012014461A1 publication Critical patent/WO2012014461A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
    • H04N19/122—Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/156—Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding

Definitions

  • the present invention relates to audio encoding / decoding, still image encoding / decoding, or moving image encoding / decoding, and more particularly, to a method related to a process of converting a space-time domain signal vector to a frequency domain, and the methods.
  • the present invention relates to a program that causes a computer to execute.
  • H.264 ITU-T As an example of the video coding standard, H.264 ITU-T standard called 26x and ISO / IEC standard called MPEG-x.
  • MPEG-x As an example of the video coding standard, H.264 ITU-T standard called 26x and ISO / IEC standard called MPEG-x.
  • the latest video coding standard is H.264. H.264 / MPEG-4AVC.
  • FIG. 2 is a diagram showing processing for encoding these audio data and moving image data at a low bit rate.
  • the conversion unit 120 converts an input signal, which is various data, or a conversion input obtained by performing some processing on the input signal from the space-time domain to the frequency domain, and outputs a converted output with reduced correlation.
  • the quantization unit 130 quantizes the conversion output output from the conversion unit 120 and outputs a quantization coefficient with a small total data amount.
  • the entropy encoding unit 190 encodes the quantization coefficient output from the quantization unit 130 using an entropy encoding algorithm, and outputs an encoded signal obtained by compressing the remaining data.
  • an N-point vector (N-dimensional signal) input to the conversion unit 120 is a conversion input vector xn, and an output of a certain conversion T is a conversion output (Transform Output) vector.
  • y be n .
  • the transformation T can be expressed by a matrix product of a transformation matrix A of an N ⁇ N matrix and a transformation input vector x n as shown in Equation 2 and Equation 3.
  • the transformation matrix A is designed to reduce the correlation of input signals and concentrate low-dimensional energy.
  • a transformation matrix derivation method or transformation method called KLT Karhunen Loeve transform
  • KLT is a method for deriving an optimum transformation matrix based on the statistical properties of an input signal, or a transformation method using the derived optimum transformation matrix (refer to Non-Patent Document 1 for details).
  • KLT is known to eliminate the correlation of input signals completely and to concentrate energy to a low frequency most efficiently.
  • KLT has a problem that the amount of calculation becomes large.
  • the conversion to the frequency domain optimized for statistical properties in the conventional image encoding device and decoding device requires multiplication for conversion, and there is a problem that the amount of calculation for multiplication is large. It was.
  • the conversion using the conversion matrix calculated based on the statistical properties of the input signal has a problem that the amount of calculation is large and the number of elements of the conversion matrix is large.
  • the present invention has been made in view of such a problem, and an object thereof is to provide an encoding method and a decoding method capable of reducing the processing load by reducing the amount of calculation.
  • an encoding method includes a conversion step of performing frequency conversion on an input signal and generating a converted output signal having coefficient values of a plurality of frequency components, A quantization step for quantizing the transformed output signal to generate a quantized coefficient; and an entropy coding step for entropy coding the quantized coefficient to generate a coded signal, wherein the transforming step comprises the input signal
  • a first conversion step of performing a first frequency conversion using a first conversion matrix to generate a first conversion output signal and a frequency conversion as the first conversion output signal are performed.
  • a second conversion step of performing a second frequency conversion on the first partial signal constituting a part of the received signal using a second conversion matrix, and in the second conversion step, In-plane preparation A matrix obtained by matrix multiplication of an inverse matrix of the first transformation matrix to a transformation matrix of one-stage transformation designed based on a statistical model of signal error is used as the second transformation matrix. Used for second frequency conversion.
  • the decoding method of the present invention also performs entropy decoding on the encoded signal to generate a quantized coefficient, and dequantizes the quantized coefficient to generate a decoded transform output signal.
  • An inverse quantization step, and a second inverse transform is performed on the first partial signal constituting a part of the decoded transform output signal using a transform matrix of the second inverse transform, and the inverse transformed first
  • a second inverse transform step for generating one partial signal, the first partial signal that has been inversely transformed, and a second partial signal that has not been subjected to the second inverse transformation
  • a first inverse transform step for performing an inverse transform using a transform matrix for the first inverse transform, wherein the second inverse transform transform matrix is the first in the encoding method according to one aspect of the present invention.
  • 2 is an inverse matrix of two transformation matrices.
  • the encoded signal can be decoded with a small amount of computation and a small transformation matrix.
  • the present invention can be realized not only as such a decoding method or an encoding method, but also as a decoding device, an encoding device or an integrated circuit for performing processing according to the method, and processing according to the method.
  • the amount of computation of the transformation is reduced and the number of elements of the transformation matrix is reduced. Can do. Note that the number of elements of a matrix is a value obtained by multiplying the size of a matrix column and row, and is 16 for a 4 ⁇ 4 matrix.
  • FIG. 1 is a block diagram illustrating a conversion unit in the encoding apparatus according to the first embodiment.
  • FIG. 2 is a block diagram showing an AV data encoding process.
  • FIG. 3 is a conceptual diagram illustrating a data flow of the conversion unit according to the first embodiment.
  • FIG. 4 is a conceptual diagram illustrating a data flow of the conversion unit according to the first embodiment.
  • FIG. 5 is a flowchart of the conversion process according to the first embodiment.
  • FIG. 6 is a flowchart of the conversion process according to the first embodiment.
  • FIG. 7 is a block diagram showing a decoding process of the encoded signal.
  • FIG. 8 is a block diagram illustrating an inverse transform unit in the decoding apparatus according to the second embodiment.
  • FIG. 9A is a diagram conceptually illustrating a data flow of the inverse conversion unit of the second embodiment.
  • FIG. 9B is a diagram conceptually showing the data flow of the inverse transform unit in the second embodiment.
  • FIG. 9C is a diagram conceptually illustrating a data flow of the inverse transform unit in the second embodiment.
  • FIG. 10 is a flowchart of the inverse conversion process according to the second embodiment.
  • FIG. 11 is a flowchart of the inverse conversion process according to the second embodiment.
  • FIG. 12 is a block diagram of the encoding apparatus according to the third embodiment.
  • FIG. 13 is a block diagram of the decoding apparatus according to the third embodiment.
  • FIG. 14 is a diagram illustrating the transformation matrix of the fifth embodiment
  • [1] represents the transformation matrix A (four-point input, real number notation) of the fifth embodiment
  • [2] represents the fifth embodiment
  • [3] represents the transformation matrix D (4-point input, 8-bit precision notation) of Embodiment 5
  • [4] The transformation matrix E (four-point input, real number notation) of the fifth embodiment is shown
  • [5] represents the transformation matrix E (four-point input, eight-bit precision notation) of the fifth embodiment.
  • FIG. 15 is a diagram illustrating the transformation matrix of the fifth embodiment, [1] represents the transformation matrix E (four-point input, real number notation) of the fifth embodiment, and [2] represents the fifth embodiment.
  • FIG. 16 is a diagram illustrating the transformation matrix of the fifth embodiment
  • FIG. 17 is a diagram illustrating the transformation matrix of the fifth embodiment, [1] represents the transformation matrix A (eight-point input, real number notation) of the fifth embodiment, and [2] represents the fifth embodiment.
  • FIG. 18 is a diagram showing the transformation matrix of the fifth embodiment, [3] shows the transformation matrix D (8-point input, 8-bit precision notation) of the fifth embodiment, and [4] The transformation matrix E of form 5 (8-point input, real number notation) is shown.
  • FIG. 19 is a diagram illustrating a transformation matrix according to the fifth embodiment, and [5] represents a transformation matrix E (8-point input, 8-bit precision notation) according to the fifth embodiment.
  • FIG. 21 is a diagram illustrating the transformation matrix of the fifth embodiment
  • FIG. 22 is a diagram showing the transformation matrix of the fifth embodiment
  • FIG. 23 is a diagram conceptually illustrating target elements of the separation-type second conversion according to the sixth embodiment.
  • FIG. 24A is a diagram conceptually illustrating a non-separable second conversion target element (example of 10-point selection) according to the sixth embodiment.
  • FIG. 24B is a diagram conceptually illustrating a non-separable second conversion target element (an example of 6-point selection) according to the sixth embodiment.
  • FIG. 24C is a diagram conceptually illustrating a non-separable second conversion target element (example of three-point selection) according to the sixth embodiment.
  • FIG. 25A is a diagram conceptually illustrating a non-separable second conversion target element (an example of 6-point selection) according to the sixth embodiment.
  • FIG. 25B is an example of assigning an index indicating a correspondence relationship from the two-dimensional to the one-dimensional of the non-separable second transformation according to the sixth embodiment.
  • FIG. 26 shows a transformation matrix E (4 ⁇ 4 points input, 8-bit precision notation) according to the sixth embodiment.
  • FIG. 31A is a diagram conceptually illustrating a non-separable second conversion target element (an example of 6-point selection) according to the sixth embodiment.
  • FIG. 32A is a diagram conceptually illustrating a non-separable second conversion target element (example of three-point selection) according to the sixth embodiment.
  • FIG. 2 is a conceptual diagram of a relationship between a prediction mode number of H.264 / AVC prediction and an extrapolation angle.
  • FIG. 33B is a relationship table (part 1) between the method of deriving the transformation matrix G or the presence / absence of use and the prediction mode number according to the fourth to seventh embodiments.
  • FIG. 33C is a relationship table (part 2) between the method of deriving the transformation matrix G or the presence / absence of use and the prediction mode number in the fourth to seventh embodiments.
  • FIG. 34A is a flowchart for deriving the transformation matrix of the separation-type second transformation described in the fourth and fifth embodiments.
  • FIG. 34B is a flowchart of transform matrix derivation of the non-separable second transform described in the sixth embodiment.
  • FIG. 35 is an overall configuration diagram of a content supply system that implements a content distribution service.
  • FIG. 36 is an overall configuration diagram of a digital broadcasting system.
  • FIG. 37 is a block diagram illustrating a configuration example of a television.
  • FIG. 38 is a block diagram illustrating a configuration example of an information reproducing / recording unit that reads and writes information from and on a recording medium that is an optical disk.
  • FIG. 39 is a diagram illustrating a structure example of a recording medium that is an optical disk.
  • FIG. 40A is a diagram illustrating an example of a mobile phone.
  • FIG. 40B is a block diagram illustrating a configuration example of a mobile phone.
  • FIG. 41 shows a structure of multiplexed data.
  • FIG. 42 is a diagram schematically showing how each stream is multiplexed in the multiplexed data.
  • FIG. 43 is a diagram showing in more detail how the video stream is stored in the PES packet sequence.
  • FIG. 40A is a diagram illustrating an example of a mobile phone.
  • FIG. 40B is a block diagram illustrating a configuration example of a mobile phone.
  • FIG. 41 shows a structure
  • FIG. 44 is a diagram showing the structure of TS packets and source packets in multiplexed data.
  • FIG. 45 shows the data structure of the PMT.
  • FIG. 46 shows the internal structure of the multiplexed data information.
  • FIG. 47 shows the internal structure of stream attribute information.
  • FIG. 48 is a diagram showing steps for identifying video data.
  • FIG. 49 is a block diagram illustrating a configuration example of an integrated circuit that implements the moving picture encoding method and the moving picture decoding method according to each embodiment.
  • FIG. 50 is a diagram illustrating a configuration for switching the driving frequency.
  • FIG. 51 is a diagram showing steps for identifying video data and switching between driving frequencies.
  • FIG. 52 is a diagram showing an example of a look-up table in which video data standards are associated with drive frequencies.
  • FIG. 53A is a diagram illustrating an example of a configuration for sharing a module of a signal processing unit.
  • FIG. 53B is a diagram illustrating another example of a configuration for sharing
  • FIG. 1 is a diagram showing a configuration of a conversion unit in the encoding apparatus of the present invention.
  • the conversion unit 120 of the present invention divides the first conversion output into two parts, a first conversion output that performs a first conversion on a conversion input, and a signal that is not subjected to the second conversion, and a signal that is not a target.
  • the integration unit 230 is conceptually described in the sense that the signals that have been conceptually divided are not in a divided state but in the original dimension, and is a special case of integration in actual information processing. There is no need to perform an action. The same applies to the following embodiments.
  • This conversion target signal (Original Signal) or a prediction error signal that is a difference between this signal and a prediction signal created based on the previously input encoding target signal is used as a conversion input, and the first conversion unit 200 Is input.
  • a prediction error signal is often input as a conversion target. However, when prediction is not performed assuming that an error is mixed in the transmission path, or when energy is small, prediction is not performed.
  • An input signal is input as a conversion target.
  • Such a conversion input Transform Input
  • FIG. 3 is a diagram conceptually showing the data flow of the conversion unit 120 in the encoding apparatus of the present invention.
  • the first conversion unit 200 converts the input x n is alleviated correlation is converted into the first conversion output y 1 n, which concentrates the energy in the low frequency band.
  • the first conversion output y 1 n is divided into a first partial signal and a second partial signal by the second conversion target determination unit 210.
  • the division of the first partial signal and the second partial signal is performed based on the division integration information so that the correlation energy of the first partial signal is larger than the correlation energy of the second partial signal.
  • the division integration information is information that causes the second conversion target determination unit 210 to perform control to divide the low frequency band as the first part and the high frequency band as the second part.
  • the division integration information may be information instructing to dynamically control a component having a large energy to the first portion and a component having a small energy to the second portion according to the input.
  • the first partial signals divided as described above are rearranged in a one-dimensional manner by the second conversion target determining unit 210, the correlation is further reduced by the second conversion unit 220, and the energy is transferred to a lower frequency band.
  • the second conversion output y 2 n is rearranged in the dimension before being rearranged by the second conversion target determination unit 210, and is integrated with the second partial signal.
  • the second conversion target is illustrated as an arbitrary area, but is not limited thereto, and may be a rectangular area.
  • FIG. 4 shows a case where the second conversion has a non-separation type configuration, and when the second conversion has a separation type configuration, rearrangement to one dimension in division and integration is not performed.
  • the data flow shown in FIG. 4 is a conceptual diagram.
  • FIG. 5 is a flowchart of the conversion process in the conversion unit 120.
  • a first transformation matrix is determined based on the conversion input x n (step S101).
  • the first conversion unit 200 the first conversion is performed using the first transformation matrix determined (step S102).
  • division integration information is determined (step S103).
  • the division integration information is read from the memory of the encoding device or the like as long as it controls the second conversion target determination unit 210 to perform predetermined division.
  • the division integration information controls the second conversion target determination unit 210 to perform division according to the first conversion output, in view of the distribution of energy states based on the first conversion output. Derivation of division integration information.
  • the second conversion target determination unit 210 divides the data (step S108), and the second conversion unit 220 performs the second conversion based on the first partial signal.
  • a matrix is determined (step S105).
  • a second conversion is performed using the second transformation matrix determined (step S106).
  • the integration unit 230 the second conversion output and the divided second partial signal are integrated and output as a conversion output (step S107). Further, the entire operation of steps S101 to S107 in FIG. 5 is defined as step S100.
  • a predetermined transformation matrix and division integration information may be used, and the operation in that case is as shown in FIG.
  • the first conversion unit 200 performs the first conversion, determines the second conversion target from the first conversion output, performs the second conversion on a part of the determined conversion output, and performs the second conversion Generate conversion output.
  • the second conversion output and the portion of the first conversion output to which the second conversion is not applied are integrated to obtain the conversion output of the conversion process of the present embodiment.
  • the second conversion target determining unit 210 and the integrating unit 230 perform the rearrangement of the dimensions of the first partial signal and the second conversion output
  • the second conversion unit 220 performs the respective rearrangements.
  • the structure to perform may be sufficient.
  • the target of encoding is a one-dimensional signal such as speech data, or in separation-type processing of each dimension that can be regarded as one-dimensional signal processing
  • the conversion input x n input to the conversion unit 120 is Since it is one-dimensional, these rearrangement processes are unnecessary.
  • the processing of the second conversion target determination unit 210 and the integration unit 230 may be substantially replaced by the second conversion unit by setting the coefficient to zero. The same applies to the following embodiments.
  • FIG. 7 is a diagram illustrating a process of decoding audio data or moving image data from an encoded signal obtained by encoding audio data or moving image data at a low bit rate.
  • entropy decoding is performed on the encoded signal
  • inverse quantization is performed
  • inverse conversion is performed. This process is almost the reverse of the encoding process described with reference to FIG.
  • the inverse transform unit 150 of the present invention will be described in detail.
  • FIG. 8 is a diagram showing a configuration of the inverse transform unit 150 in the decoding device of the present invention.
  • the inverse transform unit 150 of the present invention includes a second inverse transform target determination unit 215 that divides the decoded transform input into two parts, a target to be subjected to the second inverse transform and a signal that is not the target.
  • a second inverse transform unit 260 that performs the second inverse transform on the converted output; and an integration unit 235 that integrates the decoded first part subjected to the second inverse transform and the divided decoded second part.
  • the integration unit 235 is conceptually described in the sense that the signals that are conceptually divided are not in a divided state but in the original dimension, and is a special case of integration in actual information processing. There is no need to perform an action. The same applies to the following embodiments.
  • An encoded signal obtained by encoding a signal such as a voice, a still image, or a moving image is input to the decoding device.
  • the encoded signal is entropy-decoded and the inversely quantized signal is input to the second inverse transform target determining unit 215 as a decoded transform output y ⁇ .
  • FIGS. 9A and 9B are diagrams conceptually showing the data flow of the inverse transform unit 150 in the decoding apparatus of the present embodiment.
  • the entropy decoding unit 240 decodes the decoded quantization coefficient from the encoded signal, and the inverse quantization unit 140 generates a decoded conversion output y ⁇ .
  • the decoded transformation output ⁇ is divided into two regions, and one decoded second transformation output ⁇ 2 of the region is subjected to the second inverse transformation by the second inverse transformation unit 260, and the decoded first part. Get.
  • the decoded second part y 2 H of the other region is not converted, but is integrated with the decoded first part to become the decoded first converted output y 1 , and the first inverse conversion unit 250 performs the first inverse. Conversion is performed.
  • the second inverse transform has a separable configuration, the second inverse transform target determining unit 215 and the integrating unit 235 do not need to rearrange them into one-dimensional signals.
  • the conceptual diagram of the data flow in this case is FIG. 9C.
  • FIG. 10 is a flowchart of the inverse transformation process in the inverse transformation unit 150.
  • the inverse transformation process will be described using these.
  • division integration information is acquired (step S201).
  • the decoded transform output y ⁇ described above is divided into a decoded second transform output including a low frequency band and a decoded second partial signal including a high frequency band (Ste S208).
  • the correlation energy of the decoded second converted output is larger than the correlation energy of the decoded second partial signal based on the division integration information. To be done.
  • the division integration information is the same as that described in the first embodiment, and the acquisition of division integration information may be read out in advance and stored in a memory or the like, or dynamically according to the decoding conversion output It may be decided to.
  • the decoded second conversion output divided as described above is rearranged one-dimensionally by the second inverse conversion target determination unit 215 and input to the second inverse conversion unit 260.
  • the transformation matrix (transformation coefficient) of the inverse transformation performed by the second inverse transformation unit 260 is the inverse matrix of the transformation matrix of the second transformation described in the first embodiment or a matrix approximated thereto.
  • the inverse transformation matrix is obtained based on the set SD including the decoded second transformation output using, for example, KLT as in the first embodiment (step S203).
  • the second inverse transformation unit 260 performs the second inverse transformation of the decoded second transformation output using the transformation matrix obtained in this way, and outputs the decoded first partial signal (step S204).
  • the decoded first partial signal is rearranged in the dimension before being rearranged by the second inverse transformation target determining unit 215, integrated with the decoded second partial signal, and the decoded first converted output y ⁇ 1 is input to the first inverse transform unit 250 (step S205).
  • the inverse transformation matrix performed by the first inverse transformation unit 250 is the inverse matrix of the first transformation described in the first embodiment or a matrix approximated thereto.
  • the inverse transformation matrix is obtained based on the set S E including the decoded first transformation output ⁇ 1 using, for example, KLT as in the first embodiment (step S206).
  • the first inverse transform of the decoded first transform output y ⁇ 1 is performed using the transformation matrix thus obtained, and the decoded transform input x ⁇ is output. (Step S207). Further, the entire operation from step S201 to step S207 in FIG.
  • the set S D and the set S E are in the relationship between the set S C and the set S A of the first embodiment, and the set D is a smaller set that includes fewer samples than the set E.
  • the decoding apparatus provided with the inverse transform unit 150 according to the present embodiment can achieve both high-efficiency conversion and reduction of the calculation amount and the data amount as in the first embodiment.
  • the second inverse transformation target determination unit 215 and the integration unit 235 rearrange the dimensions of the decoded second conversion output and the decoded first partial signal.
  • the structure performed in the conversion part 260 may be sufficient. That is, a separation type conversion may be used, or a conversion including a zero coefficient may be used.
  • the decoding target is a one-dimensional signal such as speech data or a multi-dimensional signal configured as a separate type
  • a signal of each dimension can be regarded as a one-dimensional signal, so that the decoded conversion output y ⁇ input to the inverse conversion unit 155 Is one-dimensional, and the above-described dimension rearrangement (rearrangement to the one-dimensional signal in the second inverse transformation target determination unit 215 and rearrangement to the original dimension in the integration unit) becomes unnecessary.
  • the decoded conversion output, the decoded conversion input, the decoded signal, and the prediction signal are P-dimensional signals (P is an integer of 2 or more). That is, the decoding conversion output, the decoding second part, the decoding first conversion output, and the decoding conversion input are P-dimensional signals.
  • the second inverse transform unit 260 may be either for inputting / outputting a P-dimensional signal or for inputting / outputting a one-dimensional signal.
  • the second inverse transformation target determination unit 215 divides the P-dimensional signal into a decoded second converted output and a decoded second part according to the division integration information, and further rearranges the decoded second converted output into one dimension. Rearrangement order information is additionally stored in the division integration information.
  • the integration unit 235 integrates the decoded first part and the decoded second part according to the division integration information, and generates a conversion output. At this time, the integration unit 235 rearranges the decoded first part, which is a one-dimensional signal, into a P-dimensional signal based on the rearrangement information stored in the division integration information, and then integrates the first part.
  • the second inverse transform unit 260 may input / output P-dimensional signals and do not rearrange them into one-dimensional signals.
  • a conceptual diagram of the data flow is shown in FIG. 9B.
  • the second inverse conversion unit 260 may be a separation type (two-stage conversion in the horizontal axis direction and the vertical axis direction), and the conceptual diagram of the data flow in this case is FIG. 9C.
  • Inverse conversion is performed in units of rows in the horizontal direction, and inverse conversion is performed in units of columns in the vertical direction. The order of horizontal and vertical may be reversed. Since the conversion in units of one row or column with the number of elements is equivalent to not performing substantial processing, the processing may be skipped, or the norm correction processing in the subsequent stage may be performed here.
  • the transformation matrices for the row transformation and the inverse transformation of the column transformation may be the same or different.
  • the transformation matrix of row transformation may reduce the data volume of the transformation matrix by using the same transformation matrix for all rows, or adapt to the difference in statistical properties by row by using different transformation matrices for each row. The conversion performance may be improved.
  • the column transformation is the same as the row transformation, and the same transformation matrix may be used for all the columns, or different transformation matrices may be used.
  • the transformation matrix and the division integration information may be switched according to the prediction mode of in-plane prediction or inter-plane prediction. Or you may explicitly multiplex to an encoding stream which is selected from the set of a some conversion matrix and division
  • a plurality of prediction modes may be associated with one transformation matrix and the division integration information. Since the division integration information is information with relatively little change, the type of switching may be less than the conversion matrix to reduce the memory usage related to the division integration information.
  • FIG. 12 is a block diagram of the encoding apparatus according to the present embodiment.
  • the encoding apparatus according to the present embodiment selects one transformation matrix from a plurality of transformation matrices determined in advance according to the type information (prediction mode) of the prediction method.
  • the prediction control unit determines a prediction mode signal, outputs it to the prediction unit, and outputs it to the local set determination unit 223.
  • the local set determination unit 223 outputs a selection signal for selecting a predetermined transformation matrix and division integration information based on the prediction mode signal.
  • the memory Based on the selection signal, the memory outputs a predetermined conversion matrix and division integration information to the second conversion unit 220.
  • the prediction mode signal is subjected to entropy coding and multiplexed into a coded signal by compressing the amount of information, for example, by taking a difference between estimated values from information of neighboring blocks in a prediction mode signal coding unit.
  • the local set determination unit 223 may output a derivation control signal that instructs the second transformation matrix derivation unit 222 to derive a new transformation matrix and division integration information.
  • the new derivation result is stored in the memory.
  • the new transformation matrix and the division integration information are compressed in the amount of information in the transformation matrix and division integration information encoding, entropy encoded in the entropy encoding unit 190, and multiplexed into the encoded signal.
  • the conversion matrix of the second conversion and the division integration information may be switched according to the size of the conversion input.
  • the prediction may be inter-frame prediction or intra-frame prediction.
  • the intra-frame prediction may be a method of performing prediction by extrapolating code-encoded (decoded) neighboring pixels in a predetermined direction.
  • FIG. 13 is a block diagram of the decoding apparatus according to the present embodiment.
  • the decoding apparatus according to the present embodiment inversely converts a predetermined transformation matrix and division integration information based on a prediction signal decoded from an encoded signal.
  • the entropy decoding unit extracts the compressed prediction mode signal subjected to entropy decoding from the encoded signal, and decodes the prediction mode signal in combination with the estimated value from the information of the neighboring blocks.
  • the prediction mode signal is output to the prediction unit, and the prediction unit generates a prediction signal.
  • the prediction mode signal is sent to the selection signal determination unit, and the selection signal determination unit outputs a selection signal for selecting the transformation matrix and the division integration information corresponding to the prediction mode signal.
  • the selection signal is output to a memory for storing a transformation matrix for inverse transformation and a memory for storing division integration information. From each memory, the transformation matrix for the second inverse transformation and the division integration information are converted into the present embodiment. Is output to the inverse transform unit 150.
  • the conversion coefficient (conversion matrix) C of the second conversion of the present embodiment is derived from the conversion matrix C or R of the one-stage separation type conversion expressed by the following equation 5 and the conversion coefficient D of the first conversion. Is done.
  • FIG. 34A shows a flowchart of the transformation matrix derivation operation of the second transformation in the present embodiment.
  • C is vertical conversion and R is horizontal conversion.
  • C and R are defined based on the characteristics and model of the input signal, and D is determined as a transform with a small number of multiplications such as discrete cosine transform (DCT) and a low amount of calculation.
  • DCT discrete cosine transform
  • a transformation matrix E of two-stage transformation is derived as shown in the following formula 6 (step S402).
  • the matrix A is the transformation matrix C or R of the above-described one-stage transformation
  • the transformation matrix E of the two-stage transformation is derived by multiplying the matrix A by inv (B) that is an inverse matrix of B.
  • inv (B) is a B shift matrix.
  • the discrete cosine transform is one of normal matrices.
  • the conversion coefficients of B and A are N ⁇ N
  • E is also N ⁇ N.
  • the transformation matrix F ij after extraction is as shown in Equation 7,
  • the extraction means that it is a target of the second conversion of the two-stage conversion.
  • the transformation matrix G of the separation type second transformation of the two-stage transformation designed by the method shown here reflects the characteristics of the transformation matrix A (C or R) of the one-stage transformation with a small number of elements with high accuracy. Therefore, equivalent conversion performance can be obtained with a small amount of calculation.
  • the conversion matrix having a size of 4 ⁇ 4 has the value indicated by [1] in FIG. When this is represented by an integer of 8-bit precision, it is [2] in FIG.
  • the 8-bit integer value of the transform matrix of the first transform is [3] in FIG.
  • the transformation matrix E of the second transformation of the two-stage transformation is [4] in FIG.
  • the 8-bit integer value of E is [5] in FIG.
  • the norm correction at the time of extraction will be described with reference to FIG.
  • the transformation matrix E of the second transformation before extraction is [1] in FIG. 15 (the same as [4] in FIG. 14).
  • the norm N (E) of each regulation is shown on the right side.
  • the same value is obtained because a discrete cosine transform with a uniform norm is used. If two points on the low frequency side are extracted from this, [2] in FIG. 15 is obtained.
  • the norm N (F) after extraction is similarly shown on the right side.
  • the result is [3] in FIG.
  • the transformation matrix G of the second transformation after the correction of Expression 11 is [4] in FIG.
  • [5] in FIG. 15 is obtained.
  • Fig. 16 shows an example in which three low-frequency points are extracted.
  • the transformation matrix F extracted from the three low frequency points is [2] in FIG.
  • the 8-bit integer notation is [3] in FIG.
  • the transformation matrix G after the norm correction is [4] in FIG.
  • the 8-bit integer notation is [5] in FIG.
  • the transformation matrix A described in Equation 12 having a size of 8 ⁇ 8 will be described.
  • the transformation matrix A is [1] in FIG.
  • the 8-bit integer notation is [2] in FIG.
  • the 8-bit notation of 8 ⁇ 8 discrete cosine transform is [3] in FIG.
  • the transformation matrix of the second transformation of the two-stage transformation is [4] in FIG.
  • the 8-bit notation is [5] in FIG.
  • FIG. 20 shows an example in which six points on the low frequency side are extracted.
  • a transformation matrix F obtained by extracting 6 points on the low frequency side is [2] in FIG.
  • the 8-bit integer notation is [3] in FIG.
  • the transformation matrix G after the norm correction is [4] in FIG.
  • the 8-bit integer notation is [5] in FIG.
  • Fig. 21 shows an example when 5 points on the low frequency side are extracted.
  • a transformation matrix F obtained by extracting five points on the low frequency side is [2] in FIG.
  • the 8-bit integer notation is [3] in FIG.
  • the transformation matrix G after norm correction is [4] in FIG.
  • the 8-bit integer notation is [5] in FIG.
  • FIG. 22 shows an example in which four low-frequency points are extracted.
  • the transformation matrix F extracted from the four low frequency points is [2] in FIG.
  • the 8-bit integer notation is [3] in FIG.
  • the transformation matrix G after the norm correction is [4] in FIG.
  • the 8-bit integer notation is [5] in FIG.
  • the separation-type second conversion matrix shown in FIGS. 14 to 22 in the present embodiment is an example in which the conversion matrix A is a vertical conversion matrix.
  • the conversion matrix of the vertical conversion of the second conversion in this example is optimized for the vertical conversion of the vertical mode (0 in FIG. 33A) of the in-plane prediction mode, and also for the vertical conversion of modes 5 and 7 having close angles. Applicable.
  • the power can be concentrated to a lower frequency side substantially sufficiently than the DCT of the first conversion, and the horizontal conversion of the second conversion may not be performed.
  • the horizontal conversion of the second conversion in the vertical mode 0 may not be performed.
  • a statistically optimal transformation may be derived from the prediction error and applied.
  • the same transformation matrix of the vertical transformation of the second transformation can be used for the horizontal mode (1 in FIG. 33A) of the in-plane prediction mode, and is optimized. It is also applicable to horizontal conversion in modes 8 and 6 having close angles.
  • the vertical conversion in the horizontal mode (mode 1) the power is sufficiently concentrated by the first conversion, and the vertical conversion in the second conversion may not be performed. For the same reason, the vertical conversion of modes 8 and 6 having close angles may not be performed.
  • a statistically optimal transformation may be derived from the prediction error and applied.
  • the second conversion matrix G shown in the present embodiment may be applied to the second horizontal conversion and the second vertical conversion.
  • FIG. 33B summarizes the relationship between the selection of D and G and the prediction mode.
  • the selection shown in FIG. 33C may be used.
  • the conversion matrix described in this embodiment is an example, and may have slightly different values due to differences in the accuracy of the conversion matrix.
  • the numerical value in 8-bit notation is an example, and is not limited to 8 bits.
  • the extraction is a representative example, and is not limited to the number of extractions or the extraction positions described here.
  • the conversion size of 4 points or 8 points is an example and is not limited to this. Use of the vicinity of the numerical value shown in this example is not denied due to the accuracy of the expression of the transformation matrix.
  • H. When using H.264 / AVC integer precision conversion, the norm may be corrected. The norm correction is not performed with sufficient accuracy due to the accuracy of calculation accuracy, and the first transformation may be assumed to have an irregular norm. In that case, the irregularity is converted to the transformation matrix of the second transformation. Weighting for correction may be added.
  • the transformation matrix G of the separation-type second transformation of the two-stage transformation shown in the present embodiment reflects the characteristics of the transformation matrix A (C or R) of the one-stage transformation with a small number of elements with high accuracy. Therefore, equivalent conversion performance can be obtained with a small amount of calculation.
  • the second transformation in the present embodiment has a non-separable configuration, and the derivation of the transformation matrix of the second transformation shown in the fourth and fifth embodiments is similarly applied.
  • FIG. 34B shows a flowchart of the operation of deriving the transformation matrix of the second transformation in the present embodiment.
  • the encoding apparatus according to the present embodiment derives a matrix H in which a matrix operation result obtained by using the transformation matrix A and the discrete cosine transformation as horizontal transformation or vertical transformation is expanded into a separation type.
  • the horizontal / vertical low frequency side is extracted (the upper left is extracted in a triangle), and the same non-separation type is performed by performing correction processing similar to the norm correction described in the fourth and fifth embodiments.
  • a transformation matrix of the second transformation is derived and transformation is performed.
  • FIG. 23 is a conceptual diagram of a data flow in the case of performing horizontal conversion GH and vertical conversion Gv in which processing is performed on three out of four points in the separation type two-stage conversion.
  • the element marked with “X” is the target position for the second conversion, and the element marked with “1” means not targeted.
  • 24A to 24C show examples of conversion targets in the non-separable second conversion.
  • FIG. 24A is an example in which the upper left 10 are the targets of the second conversion.
  • FIG. 24B is an example of 6 points
  • FIG. 24C is an example of 3 points.
  • the output of the first transformation of the prediction error signal (transformation input) is concentrated in the upper left triangular element as in these examples. Tend. Therefore, selection as in these examples can exhibit high conversion performance with a small amount of computation (reducing the number of elements of the conversion matrix of the second conversion).
  • FIG. 25A is an example in which the target position of the two-stage conversion is indicated by X.
  • FIG. 25B is an example in which numbers (indexes) are assigned to elements in raster order. The order of assigning numbers may be in the order of energy, but is assumed to be a raster for simplicity of explanation.
  • the four-point transformation matrix A is a vertical transformation matrix and the four-point DCT is a horizontal transformation matrix
  • the transformation matrix E is as shown in FIG. 26 (8-bit integer notation).
  • FIG. 27 is a transformation matrix F of the non-separable two-stage transformation in the case of extracting the top 10 pieces shown in FIG. 24A (8-bit precision notation).
  • FIG. 28 shows a transformation matrix G after norm correction (8-bit precision notation).
  • FIG. 29 is another notation of F in FIG. 27 described above.
  • the elements that are not subject to the two-step conversion are indicated by a notation having 256 on the diagonal and 0 on the other than the diagonal. Even if matrix multiplication is performed with this matrix, the same result as the transformation matrix shown in FIG. 27 is obtained.
  • FIG. 30 shows another notation of the transformation matrix G after norm correction.
  • FIG. 31A to FIG. 31C are examples in the case where the upper left six points shown in FIG. 31A are the targets of the second conversion.
  • FIG. 31B shows a transformation matrix F before norm correction
  • FIG. 31C shows a transformation matrix G after norm correction.
  • 32B and 32C are examples of transformation matrices in the case where the upper left three points shown in FIG. 32A are to be subjected to the second transformation.
  • FIG. 32B shows a transformation matrix F before norm correction
  • FIG. 32C shows a transformation matrix G after norm correction.
  • the transformation matrix of the second transformation shown so far in the present embodiment is a case where the 4-point transformation matrix A is a vertical transformation matrix and the 4-point DCT is a horizontal transformation matrix.
  • the transformation matrix in this example is optimized for the vertical mode (0 in FIG. 33A) of the in-plane prediction mode, and can also be applied to modes 5 and 7 having close angles.
  • the in-plane prediction mode is set to the horizontal mode (FIG. 33A).
  • the transformation matrix (E, F, G) of the second transformation optimized to 1) is obtained. It is also applicable to modes 8 and 6 having close angles.
  • a specific numerical example of the transformation matrix is obtained by transposing the transformation matrices E, F, and G shown in FIGS.
  • Two transformation matrices (E, F, G) are obtained.
  • the numerical value in 8-bit notation is an example and is not limited to 8 bits.
  • the extraction is a representative example, and is not limited to the number of extractions or the extraction positions described here.
  • the conversion size of 4 points is an example and is not limited to this. Use of the vicinity of the numerical value shown in this example is not denied due to the accuracy of the expression of the transformation matrix.
  • H. When using H.264 / AVC integer precision conversion, the norm may be corrected. The norm correction is not performed with sufficient accuracy due to the accuracy of calculation accuracy, and the first transformation may be assumed to have an irregular norm. In that case, the irregularity is converted to the transformation matrix of the second transformation. Weighting for correction may be added.
  • the transformation matrix G of the non-separable second transformation of the two-stage transformation shown in the present embodiment accurately reflects the characteristics of the transformation matrix A (C or R) of the one-stage transformation with a small number of elements. Therefore, equivalent conversion performance can be obtained with a small amount of calculation. This is particularly effective for a prediction error signal for in-plane prediction in which extrapolation is performed at a predetermined angle.
  • the decoding apparatus is the inverse of the transformation matrix G of the second transformation derived in the fourth to sixth embodiments with the transform coefficient of the second inverse transformation in the decoding apparatus of the first to third embodiments.
  • the matrix invG is used.
  • the transformation matrix of the second transformation is a normal matrix
  • the inverse matrix invG is a transposed matrix GT.
  • InvG and G may have different effective bit lengths for convenience of calculation accuracy.
  • G may be G ′ of the inverse matrix of invG.
  • the transformation matrix invG of the second inverse transformation of the two-stage transformation shown in the present embodiment reflects the characteristics of the transformation matrix A (C or R) of the one-stage transformation with a small number of elements with high accuracy.
  • the equivalent conversion performance can be obtained with a small amount of calculation. This is particularly effective for a prediction error signal for in-plane prediction in which extrapolation is performed at a predetermined angle.
  • the storage medium may be any medium that can record a program, such as a magnetic disk, an optical disk, a magneto-optical disk, an IC card, and a semiconductor memory.
  • FIG. 35 is a diagram showing an overall configuration of a content supply system ex100 that realizes a content distribution service.
  • a communication service providing area is divided into desired sizes, and base stations ex106, ex107, ex108, ex109, and ex110, which are fixed wireless stations, are installed in each cell.
  • This content supply system ex100 includes a computer ex111, a PDA (Personal Digital Assistant) ex112, a camera ex113, a mobile phone ex114, a game machine ex115 via the Internet ex101, the Internet service provider ex102, the telephone network ex104, and the base stations ex106 to ex110. Etc. are connected.
  • PDA Personal Digital Assistant
  • each device may be directly connected to the telephone network ex104 without going from the base station ex106, which is a fixed wireless station, to ex110.
  • the devices may be directly connected to each other via short-range wireless or the like.
  • the camera ex113 is a device that can shoot moving images such as a digital video camera
  • the camera ex116 is a device that can shoot still images and movies such as a digital camera.
  • the mobile phone ex114 is a GSM (Global System for Mobile Communications) system, a CDMA (Code Division Multiple Access) system, a W-CDMA (Wideband-Code Division Multiple Access) system, an LTE (Long Terminal Evolution) system, an HSPA ( High-speed-Packet-Access) mobile phone or PHS (Personal-Handyphone System), etc.
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • W-CDMA Wideband-Code Division Multiple Access
  • LTE Long Terminal Evolution
  • HSPA High-speed-Packet-Access
  • PHS Personal-Handyphone System
  • the camera ex113 and the like are connected to the streaming server ex103 through the base station ex109 and the telephone network ex104, thereby enabling live distribution and the like.
  • live distribution the content (for example, music live video) captured by the user using the camera ex113 is encoded as described in the above embodiments, and transmitted to the streaming server ex103.
  • the streaming server ex103 stream-distributes the content data transmitted to the requested client. Examples of the client include a computer ex111, a PDA ex112, a camera ex113, a mobile phone ex114, and a game machine ex115 that can decode the encoded data. Each device that receives the distributed data decodes the received data and reproduces it.
  • the captured data may be encoded by the camera ex113, the streaming server ex103 that performs data transmission processing, or may be shared with each other.
  • the decryption processing of the distributed data may be performed by the client, the streaming server ex103, or may be performed in common with each other.
  • still images and / or moving image data captured by the camera ex116 may be transmitted to the streaming server ex103 via the computer ex111.
  • the encoding process in this case may be performed by any of the camera ex116, the computer ex111, and the streaming server ex103, or may be performed in a shared manner.
  • these encoding / decoding processes are generally performed in the computer ex111 and the LSI ex500 included in each device.
  • the LSI ex500 may be configured as a single chip or a plurality of chips.
  • moving image encoding / decoding software is incorporated into some recording medium (CD-ROM, flexible disk, hard disk, etc.) that can be read by the computer ex111, etc., and encoding / decoding processing is performed using the software. May be.
  • moving image data acquired by the camera may be transmitted.
  • the moving image data at this time is data encoded by the LSI ex500 included in the mobile phone ex114.
  • the streaming server ex103 may be a plurality of servers or a plurality of computers, and may process, record, and distribute data in a distributed manner.
  • the encoded data can be received and reproduced by the client.
  • the information transmitted by the user can be received, decrypted and reproduced by the client in real time, and personal broadcasting can be realized even for a user who does not have special rights or facilities.
  • At least one of the video encoding device and the video decoding device of each of the above embodiments is incorporated in the digital broadcasting system ex200. be able to.
  • the broadcast station ex201 multiplexed data obtained by multiplexing music data and the like on video data is transmitted to a communication or satellite ex202 via radio waves.
  • This video data is data encoded by the moving image encoding method described in the above embodiments.
  • the broadcasting satellite ex202 transmits a radio wave for broadcasting, and this radio wave is received by a home antenna ex204 capable of receiving satellite broadcasting.
  • the received multiplexed data is decoded and reproduced by a device such as the television (receiver) ex300 or the set top box (STB) ex217.
  • a reader / recorder ex218 that reads and decodes multiplexed data recorded on a recording medium ex215 such as a DVD or a BD, or encodes a video signal on the recording medium ex215 and, in some cases, multiplexes and writes it with a music signal. It is possible to mount the moving picture decoding apparatus or moving picture encoding apparatus described in the above embodiments. In this case, the reproduced video signal is displayed on the monitor ex219, and the video signal can be reproduced in another device or system using the recording medium ex215 on which the multiplexed data is recorded.
  • a moving picture decoding apparatus may be mounted in a set-top box ex217 connected to a cable ex203 for cable television or an antenna ex204 for satellite / terrestrial broadcasting and displayed on the monitor ex219 of the television.
  • the moving picture decoding apparatus may be incorporated in the television instead of the set top box.
  • FIG. 37 is a diagram illustrating a television (receiver) ex300 that uses the video decoding method and the video encoding method described in the above embodiments.
  • the television ex300 obtains or outputs multiplexed data in which audio data is multiplexed with video data via the antenna ex204 or the cable ex203 that receives the broadcast, and demodulates the received multiplexed data.
  • the modulation / demodulation unit ex302 that modulates multiplexed data to be transmitted to the outside, and the demodulated multiplexed data is separated into video data and audio data, or the video data and audio data encoded by the signal processing unit ex306 Is provided with a multiplexing / demultiplexing unit ex303.
  • the television ex300 decodes the audio data and the video data, or encodes each information, the audio signal processing unit ex304, the signal processing unit ex306 including the video signal processing unit ex305, and the decoded audio signal.
  • the television ex300 includes an interface unit ex317 including an operation input unit ex312 that receives an input of a user operation.
  • the television ex300 includes a control unit ex310 that performs overall control of each unit, and a power supply circuit unit ex311 that supplies power to each unit.
  • the interface unit ex317 includes a bridge unit ex313 connected to an external device such as a reader / recorder ex218, a recording unit ex216 such as an SD card, and an external recording unit such as a hard disk.
  • a driver ex315 for connecting to a medium, a modem ex316 for connecting to a telephone network, and the like may be included.
  • the recording medium ex216 is capable of electrically recording information by using a nonvolatile / volatile semiconductor memory element to be stored.
  • Each part of the television ex300 is connected to each other via a synchronous bus.
  • the television ex300 receives a user operation from the remote controller ex220 or the like, and demultiplexes the multiplexed data demodulated by the modulation / demodulation unit ex302 by the multiplexing / demultiplexing unit ex303 based on the control of the control unit ex310 having a CPU or the like. Furthermore, in the television ex300, the separated audio data is decoded by the audio signal processing unit ex304, and the separated video data is decoded by the video signal processing unit ex305 using the decoding method described in each of the above embodiments.
  • the decoded audio signal and video signal are output from the output unit ex309 to the outside. At the time of output, these signals may be temporarily stored in the buffers ex318, ex319, etc. so that the audio signal and the video signal are reproduced in synchronization. Also, the television ex300 may read multiplexed data from recording media ex215 and ex216 such as a magnetic / optical disk and an SD card, not from broadcasting. Next, a configuration in which the television ex300 encodes an audio signal or a video signal and transmits the signal to the outside or to a recording medium will be described.
  • the television ex300 receives a user operation from the remote controller ex220 and the like, encodes an audio signal with the audio signal processing unit ex304, and converts the video signal with the video signal processing unit ex305 based on the control of the control unit ex310. Encoding is performed using the encoding method described in (1).
  • the encoded audio signal and video signal are multiplexed by the multiplexing / demultiplexing unit ex303 and output to the outside. When multiplexing, these signals may be temporarily stored in the buffers ex320, ex321, etc. so that the audio signal and the video signal are synchronized.
  • a plurality of buffers ex318, ex319, ex320, and ex321 may be provided as illustrated, or one or more buffers may be shared. Further, in addition to the illustrated example, data may be stored in the buffer as a buffer material that prevents system overflow and underflow, for example, between the modulation / demodulation unit ex302 and the multiplexing / demultiplexing unit ex303.
  • the television ex300 has a configuration for receiving AV input of a microphone and a camera, and performs encoding processing on the data acquired from them. Also good.
  • the television ex300 has been described as a configuration capable of the above-described encoding processing, multiplexing, and external output, but these processing cannot be performed, and only the above-described reception, decoding processing, and external output are possible. It may be a configuration.
  • the decoding process or the encoding process may be performed by either the television ex300 or the reader / recorder ex218,
  • the reader / recorder ex218 may share with each other.
  • FIG. 38 shows a configuration of the information reproducing / recording unit ex400 when data is read from or written to an optical disk.
  • the information reproducing / recording unit ex400 includes elements ex401, ex402, ex403, ex404, ex405, ex406, and ex407 described below.
  • the optical head ex401 irradiates a laser spot on the recording surface of the recording medium ex215 that is an optical disk to write information, and detects information reflected from the recording surface of the recording medium ex215 to read the information.
  • the modulation recording unit ex402 electrically drives a semiconductor laser built in the optical head ex401 and modulates the laser beam according to the recording data.
  • the reproduction demodulator ex403 amplifies the reproduction signal obtained by electrically detecting the reflected light from the recording surface by the photodetector built in the optical head ex401, separates and demodulates the signal component recorded on the recording medium ex215, and is necessary To play back information.
  • the buffer ex404 temporarily holds information to be recorded on the recording medium ex215 and information reproduced from the recording medium ex215.
  • the disk motor ex405 rotates the recording medium ex215.
  • the servo control unit ex406 moves the optical head ex401 to a predetermined information track while controlling the rotational drive of the disk motor ex405, and performs a laser spot tracking process.
  • the system control unit ex407 controls the entire information reproduction / recording unit ex400.
  • the system control unit ex407 uses various types of information held in the buffer ex404, and generates and adds new information as necessary.
  • the modulation recording unit ex402, the reproduction demodulation unit This is realized by recording / reproducing information through the optical head ex401 while operating the ex403 and the servo control unit ex406 in a coordinated manner.
  • the system control unit ex407 includes, for example, a microprocessor, and executes these processes by executing a read / write program.
  • the optical head ex401 has been described as irradiating a laser spot.
  • a configuration in which higher-density recording is performed using near-field light may be used.
  • FIG. 39 shows a schematic diagram of a recording medium ex215 that is an optical disk.
  • Guide grooves grooves
  • address information indicating the absolute position on the disc is recorded in advance on the information track ex230 by changing the shape of the groove.
  • This address information includes information for specifying the position of the recording block ex231 that is a unit for recording data, and the recording block is specified by reproducing the information track ex230 and reading the address information in a recording or reproducing apparatus.
  • the recording medium ex215 includes a data recording area ex233, an inner peripheral area ex232, and an outer peripheral area ex234.
  • the area used for recording user data is the data recording area ex233, and the inner circumference area ex232 and the outer circumference area ex234 arranged on the inner or outer circumference of the data recording area ex233 are used for specific purposes other than user data recording. Used.
  • the information reproducing / recording unit ex400 reads / writes encoded audio data, video data, or multiplexed data obtained by multiplexing these data with respect to the data recording area ex233 of the recording medium ex215.
  • an optical disk such as a single-layer DVD or BD has been described as an example.
  • the present invention is not limited to these, and an optical disk having a multilayer structure and capable of recording other than the surface may be used.
  • an optical disc with a multi-dimensional recording / reproducing structure such as recording information using light of different wavelengths in the same place on the disc, or recording different layers of information from various angles. It may be.
  • the car ex210 having the antenna ex205 can receive data from the satellite ex202 and the like, and the moving image can be reproduced on a display device such as the car navigation ex211 that the car ex210 has.
  • the configuration of the car navigation ex211 may be, for example, a configuration in which a GPS receiving unit is added in the configuration illustrated in FIG.
  • FIG. 40A is a diagram showing the mobile phone ex114 using the moving picture decoding method and the moving picture encoding method described in the above embodiment.
  • the mobile phone ex114 includes an antenna ex350 for transmitting and receiving radio waves to and from the base station ex110, a camera unit ex365 capable of capturing video and still images, a video captured by the camera unit ex365, a video received by the antenna ex350, and the like Is provided with a display unit ex358 such as a liquid crystal display for displaying the decrypted data.
  • the mobile phone ex114 further includes a main body unit having an operation key unit ex366, an audio output unit ex357 such as a speaker for outputting audio, an audio input unit ex356 such as a microphone for inputting audio, a captured video,
  • an audio input unit ex356 such as a microphone for inputting audio
  • a captured video In the memory unit ex367 for storing encoded data or decoded data such as still images, recorded audio, received video, still images, mails, or the like, or an interface unit with a recording medium for storing data
  • a slot ex364 is provided.
  • the mobile phone ex114 has a power supply circuit part ex361, an operation input control part ex362, and a video signal processing part ex355 with respect to a main control part ex360 that comprehensively controls each part of the main body including the display part ex358 and the operation key part ex366.
  • a camera interface unit ex363, an LCD (Liquid Crystal Display) control unit ex359, a modulation / demodulation unit ex352, a multiplexing / demultiplexing unit ex353, an audio signal processing unit ex354, a slot unit ex364, and a memory unit ex367 are connected to each other via a bus ex370. ing.
  • the power supply circuit unit ex361 starts up the mobile phone ex114 in an operable state by supplying power from the battery pack to each unit.
  • the cellular phone ex114 converts the audio signal collected by the audio input unit ex356 in the voice call mode into a digital audio signal by the audio signal processing unit ex354 based on the control of the main control unit ex360 having a CPU, a ROM, a RAM, and the like. Then, this is subjected to spectrum spread processing by the modulation / demodulation unit ex352, digital-analog conversion processing and frequency conversion processing are performed by the transmission / reception unit ex351, and then transmitted via the antenna ex350.
  • the mobile phone ex114 also amplifies the received data received via the antenna ex350 in the voice call mode, performs frequency conversion processing and analog-digital conversion processing, performs spectrum despreading processing by the modulation / demodulation unit ex352, and performs voice signal processing unit After being converted into an analog audio signal by ex354, this is output from the audio output unit ex357.
  • the text data of the e-mail input by operating the operation key unit ex366 of the main unit is sent to the main control unit ex360 via the operation input control unit ex362.
  • the main control unit ex360 performs spread spectrum processing on the text data in the modulation / demodulation unit ex352, performs digital analog conversion processing and frequency conversion processing in the transmission / reception unit ex351, and then transmits the text data to the base station ex110 via the antenna ex350.
  • almost the reverse process is performed on the received data and output to the display unit ex358.
  • the video signal processing unit ex355 compresses the video signal supplied from the camera unit ex365 by the moving image encoding method described in the above embodiments.
  • the encoded video data is sent to the multiplexing / separating unit ex353.
  • the audio signal processing unit ex354 encodes the audio signal picked up by the audio input unit ex356 while the camera unit ex365 images a video, a still image, etc., and sends the encoded audio data to the multiplexing / separating unit ex353. To do.
  • the multiplexing / demultiplexing unit ex353 multiplexes the encoded video data supplied from the video signal processing unit ex355 and the encoded audio data supplied from the audio signal processing unit ex354 by a predetermined method, and is obtained as a result.
  • the multiplexed data is subjected to spread spectrum processing by the modulation / demodulation unit (modulation / demodulation circuit unit) ex352, digital-analog conversion processing and frequency conversion processing by the transmission / reception unit ex351, and then transmitted via the antenna ex350.
  • the multiplexing / separating unit ex353 separates the multiplexed data into a video data bit stream and an audio data bit stream, and performs video signal processing on the video data encoded via the synchronization bus ex370.
  • the encoded audio data is supplied to the audio signal processing unit ex354 while being supplied to the unit ex355.
  • the video signal processing unit ex355 decodes the video signal by decoding using the video decoding method corresponding to the video encoding method described in each of the above embodiments, and the display unit ex358 via the LCD control unit ex359. From, for example, video and still images included in a moving image file linked to a home page are displayed.
  • the audio signal processing unit ex354 decodes the audio signal, and the audio is output from the audio output unit ex357.
  • the terminal such as the mobile phone ex114 is referred to as a transmission terminal having only an encoder and a receiving terminal having only a decoder.
  • a transmission terminal having only an encoder
  • a receiving terminal having only a decoder.
  • multiplexed data in which music data is multiplexed with video data is received and transmitted.
  • character data related to video is multiplexed. It may be converted data, or may be video data itself instead of multiplexed data.
  • the moving picture encoding method or the moving picture decoding method shown in each of the above embodiments can be used in any of the above-described devices / systems. The described effect can be obtained.
  • multiplexed data obtained by multiplexing audio data or the like with video data is configured to include identification information indicating which standard the video data conforms to.
  • identification information indicating which standard the video data conforms to.
  • FIG. 41 is a diagram showing a structure of multiplexed data.
  • multiplexed data is obtained by multiplexing one or more of a video stream, an audio stream, a presentation graphics stream (PG), and an interactive graphics stream.
  • the video stream indicates the main video and sub-video of the movie
  • the audio stream (IG) indicates the main audio portion of the movie and the sub-audio mixed with the main audio
  • the presentation graphics stream indicates the subtitles of the movie.
  • the main video indicates a normal video displayed on the screen
  • the sub-video is a video displayed on a small screen in the main video.
  • the interactive graphics stream indicates an interactive screen created by arranging GUI components on the screen.
  • the video stream is encoded by the moving image encoding method or apparatus shown in the above embodiments, or the moving image encoding method or apparatus conforming to the conventional standards such as MPEG-2, MPEG4-AVC, and VC-1. ing.
  • the audio stream is encoded by a method such as Dolby AC-3, Dolby Digital Plus, MLP, DTS, DTS-HD, or linear PCM.
  • Each stream included in the multiplexed data is identified by PID. For example, 0x1011 for video streams used for movie images, 0x1100 to 0x111F for audio streams, 0x1200 to 0x121F for presentation graphics, 0x1400 to 0x141F for interactive graphics streams, 0x1B00 to 0x1B1F are assigned to video streams used for sub-pictures, and 0x1A00 to 0x1A1F are assigned to audio streams used for sub-audio mixed with the main audio.
  • FIG. 42 is a diagram schematically showing how multiplexed data is multiplexed.
  • a video stream ex235 composed of a plurality of video frames and an audio stream ex238 composed of a plurality of audio frames are converted into PES packet sequences ex236 and ex239, respectively, and converted into TS packets ex237 and ex240.
  • the data of the presentation graphics stream ex241 and interactive graphics ex244 are converted into PES packet sequences ex242 and ex245, respectively, and further converted into TS packets ex243 and ex246.
  • the multiplexed data ex247 is configured by multiplexing these TS packets into one stream.
  • FIG. 43 shows in more detail how the video stream is stored in the PES packet sequence.
  • the first row in FIG. 43 shows a video frame sequence of the video stream.
  • the second level shows a PES packet sequence.
  • a plurality of Video Presentation Units in the video stream are divided into pictures, B pictures, and P pictures and stored in the payload of the PES packet.
  • Each PES packet has a PES header, and a PTS (Presentation Time-Stamp) that is a display time of a picture and a DTS (Decoding Time-Stamp) that is a decoding time of a picture are stored in the PES header.
  • PTS Presentation Time-Stamp
  • DTS Decoding Time-Stamp
  • FIG. 44 shows the format of TS packets that are finally written in the multiplexed data.
  • the TS packet is a 188-byte fixed-length packet composed of a 4-byte TS header having information such as a PID for identifying a stream and a 184-byte TS payload for storing data.
  • the PES packet is divided and stored in the TS payload.
  • a 4-byte TP_Extra_Header is added to a TS packet, forms a 192-byte source packet, and is written in multiplexed data.
  • TP_Extra_Header information such as ATS (Arrival_Time_Stamp) is described.
  • ATS indicates the transfer start time of the TS packet to the PID filter of the decoder.
  • source packets are arranged in the multiplexed data, and a number incremented from the head of the multiplexed data is called an SPN (source packet number).
  • TS packets included in the multiplexed data include PAT (Program Association Table), PMT (Program Map Table), PCR (Program Clock Reference), and the like in addition to each stream such as video / audio / caption.
  • PAT indicates what the PID of the PMT used in the multiplexed data is, and the PID of the PAT itself is registered as 0.
  • the PMT has the PID of each stream such as video / audio / subtitles included in the multiplexed data and the attribute information of the stream corresponding to each PID, and has various descriptors related to the multiplexed data.
  • the descriptor includes copy control information for instructing permission / non-permission of copying of multiplexed data.
  • the PCR corresponds to the ATS in which the PCR packet is transferred to the decoder. Contains STC time information.
  • FIG. 45 is a diagram for explaining the data structure of the PMT in detail.
  • a PMT header describing the length of data included in the PMT is arranged at the head of the PMT.
  • a plurality of descriptors related to multiplexed data are arranged.
  • the copy control information and the like are described as descriptors.
  • a plurality of pieces of stream information regarding each stream included in the multiplexed data are arranged.
  • the stream information includes a stream descriptor in which a stream type, a stream PID, and stream attribute information (frame rate, aspect ratio, etc.) are described to identify a compression codec of the stream.
  • the multiplexed data is recorded together with the multiplexed data information file.
  • the multiplexed data information file is management information of multiplexed data, has a one-to-one correspondence with the multiplexed data, and includes multiplexed data information, stream attribute information, and an entry map.
  • the multiplexed data information includes a system rate, a reproduction start time, and a reproduction end time.
  • the system rate indicates a maximum transfer rate of multiplexed data to a PID filter of a system target decoder described later.
  • the ATS interval included in the multiplexed data is set to be equal to or less than the system rate.
  • the playback start time is the PTS of the first video frame of the multiplexed data
  • the playback end time is set by adding the playback interval for one frame to the PTS of the video frame at the end of the multiplexed data.
  • attribute information about each stream included in the multiplexed data is registered for each PID.
  • the attribute information has different information for each video stream, audio stream, presentation graphics stream, and interactive graphics stream.
  • the video stream attribute information includes the compression codec used to compress the video stream, the resolution of the individual picture data constituting the video stream, the aspect ratio, and the frame rate. It has information such as how much it is.
  • the audio stream attribute information includes the compression codec used to compress the audio stream, the number of channels included in the audio stream, the language supported, and the sampling frequency. With information. These pieces of information are used for initialization of the decoder before the player reproduces it.
  • the stream type included in the PMT is used.
  • video stream attribute information included in the multiplexed data information is used.
  • the video encoding shown in each of the above embodiments for the stream type or video stream attribute information included in the PMT.
  • FIG. 48 shows steps of the moving picture decoding method according to the present embodiment.
  • step exS100 the stream type included in the PMT or the video stream attribute information included in the multiplexed data information is acquired from the multiplexed data.
  • step exS101 it is determined whether or not the stream type or the video stream attribute information indicates multiplexed data generated by the moving picture encoding method or apparatus described in the above embodiments. To do.
  • step exS102 the above embodiments are performed. Decoding is performed by the moving picture decoding method shown in the form.
  • the conventional information Decoding is performed by a moving image decoding method compliant with the standard.
  • FIG. 49 shows a configuration of an LSI ex500 that is made into one chip.
  • the LSI ex500 includes elements ex501, ex502, ex503, ex504, ex505, ex506, ex507, ex508, and ex509 described below, and each element is connected via a bus ex510.
  • the power supply circuit unit ex505 is activated to an operable state by supplying power to each unit when the power supply is on.
  • the LSI ex500 when performing the encoding process, performs the microphone ex117 and the camera ex113 by the AV I / O ex509 based on the control of the control unit ex501 including the CPU ex502, the memory controller ex503, the stream controller ex504, the drive frequency control unit ex512, and the like.
  • the AV signal is input from the above.
  • the input AV signal is temporarily stored in an external memory ex511 such as SDRAM.
  • the accumulated data is divided into a plurality of times as appropriate according to the processing amount and the processing speed and sent to the signal processing unit ex507, and the signal processing unit ex507 encodes an audio signal and / or video. Signal encoding is performed.
  • the encoding process of the video signal is the encoding process described in the above embodiments.
  • the signal processing unit ex507 further performs processing such as multiplexing the encoded audio data and the encoded video data according to circumstances, and outputs the result from the stream I / Oex 506 to the outside.
  • the output multiplexed data is transmitted to the base station ex107 or written to the recording medium ex215. It should be noted that data should be temporarily stored in the buffer ex508 so as to be synchronized when multiplexing.
  • the memory ex511 is described as an external configuration of the LSI ex500.
  • a configuration included in the LSI ex500 may be used.
  • the number of buffers ex508 is not limited to one, and a plurality of buffers may be provided.
  • the LSI ex500 may be made into one chip or a plurality of chips.
  • control unit ex501 includes the CPU ex502, the memory controller ex503, the stream controller ex504, the drive frequency control unit ex512, and the like, but the configuration of the control unit ex501 is not limited to this configuration.
  • the signal processing unit ex507 may further include a CPU.
  • the CPU ex502 may be configured to include a signal processing unit ex507 or, for example, an audio signal processing unit that is a part of the signal processing unit ex507.
  • the control unit ex501 is configured to include a signal processing unit ex507 or a CPU ex502 having a part thereof.
  • LSI LSI
  • IC system LSI
  • super LSI ultra LSI depending on the degree of integration
  • the method of circuit integration is not limited to LSI, and implementation with a dedicated circuit or a general-purpose processor is also possible.
  • An FPGA Field Programmable Gate Array
  • a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
  • FIG. 50 shows a configuration ex800 in the present embodiment.
  • Driving frequency switching unit ex803 includes, video data, if they were generated by the moving picture coding method or apparatus described in each of embodiments, set high driving frequency. Then, the decoding processing unit ex801 that executes the moving picture decoding method described in each of the above embodiments is instructed to decode the video data.
  • video data when the video data conforms to the conventional standard, compared with the case where the video data are those generated by the moving picture coding method or apparatus described in each of embodiments, Set the drive frequency low. Then, it instructs the decoding processing unit ex802 compliant with the conventional standard to decode the video data.
  • the drive frequency switching unit ex803 includes the CPU ex502 and the drive frequency control unit ex512 of FIG.
  • the decoding processing unit ex801 that executes the moving picture decoding method shown in each of the above embodiments and the decoding processing unit ex802 that complies with the conventional standard correspond to the signal processing unit ex507 in FIG.
  • the CPU ex502 identifies which standard the video data conforms to.
  • the drive frequency control unit ex512 sets the drive frequency.
  • the signal processing unit ex507 decodes the video data.
  • the identification of the video data for example, it is conceivable to use the identification information described in the ninth embodiment.
  • the identification information is not limited to that described in Embodiment 9, and any information that can identify which standard the video data conforms to may be used. For example, one in which video data is available to the television, based on the external signal identifying and whether it is intended to be utilized in the disk can be identified or are those to which standard the video data conforms In some cases, identification may be performed based on such an external signal.
  • the selection of the driving frequency in the CPU ex502 may be performed based on, for example, a lookup table in which video data standards and driving frequencies are associated with each other as shown in FIG.
  • a look-up table, buffer ex508 and may be stored in an internal memory of an LSI, and by CPUex502 refers to the look-up table, it is possible to select the drive frequency.
  • FIG. 51 shows steps for executing the method of the present embodiment.
  • the signal processing unit ex507 acquires identification information from the multiplexed data.
  • step ExS201 identifying the CPU ex 502, whether the image data based on the identification information is one that was generated by the encoding method or apparatus described in each of embodiments.
  • the CPU ex502 sends a signal for setting the drive frequency high to the drive frequency control unit ex512. Then, the drive frequency control unit ex512 sets a high drive frequency.
  • the CPU ex502 drives the signal for setting the drive frequency low in step exS203. This is sent to the frequency control unit ex512. Then, the driving frequency control unit ex 512, compared with the case where the video data were generated by the encoding method or apparatus described in each of embodiments is set to a lower drive frequency.
  • the voltage applied to the apparatus including the LSI ex 500 or LSI ex 500 by changing the voltage applied to the apparatus including the LSI ex 500 or LSI ex 500, it is possible to enhance the power saving effect.
  • the drive frequency when the drive frequency is set low, it is conceivable that the voltage applied to the LSI ex500 or the device including the LSI ex500 is set low as compared with the case where the drive frequency is set high.
  • the amount of processing for decoding video data compliant with the MPEG4-AVC standard is larger than the amount of processing for decoding video data generated by the moving picture encoding method or apparatus described in the above embodiments. It is conceivable that the setting of the driving frequency is reversed to that in the case described above.
  • the method for setting the drive frequency is not limited to the configuration in which the drive frequency is lowered.
  • the voltage applied to the LSIex500 or the apparatus including the LSIex500 is set high.
  • the video data conforms to the conventional standards such as MPEG-2, MPEG4-AVC, and VC-1
  • the identification information indicates that the video data is generated by the moving image encoding method or apparatus described in the above embodiments, the driving of the CPU ex502 is stopped.
  • the CPUex 502 is temporarily stopped because there is a margin in processing. Is also possible. Even when the identification information indicates that the video data is generated by the moving image encoding method or apparatus described in each of the above embodiments, if there is a margin for processing, the CPU ex502 is temporarily driven. It can also be stopped. In this case, it is conceivable to set the stop time shorter than in the case where the video data conforms to the conventional standards such as MPEG-2, MPEG4-AVC, and VC-1.
  • a plurality of video data that conforms to different standards may be input to the above-described devices and systems such as a television and a mobile phone.
  • the signal processing unit ex507 of the LSI ex500 needs to support a plurality of standards in order to be able to decode even when a plurality of video data complying with different standards is input.
  • the signal processing unit ex507 corresponding to each standard is used individually, there is a problem that the circuit scale of the LSI ex500 increases and the cost increases.
  • a decoding processing unit for executing the moving picture decoding method shown in each of the above embodiments and a decoding conforming to a standard such as MPEG-2, MPEG4-AVC, or VC-1
  • the processing unit is partly shared.
  • An example of this configuration is shown as ex900 in FIG. 53A.
  • the moving picture decoding method shown in each of the above embodiments and the moving picture decoding method compliant with the MPEG4-AVC standard are processed in processes such as entropy coding, inverse quantization, deblocking filter, and motion compensation. Some contents are common.
  • the decoding processing unit ex902 corresponding to the MPEG4-AVC standard is shared, and for other processing contents specific to the present invention not corresponding to the MPEG4-AVC standard, the dedicated decoding processing unit ex901 is used.
  • Configuration is conceivable.
  • a dedicated decoding processing unit ex901 is used for inverse quantization, and other entropy coding, deblocking filter, motion compensation, and the like are used.
  • ex1000 in FIG. 53B shows another example in which processing is partially shared.
  • a dedicated decoding processing unit ex1001 corresponding to processing content unique to the present invention
  • a dedicated decoding processing unit ex1002 corresponding to processing content specific to other conventional standards
  • a moving picture decoding method of the present invention A common decoding processing unit ex1003 corresponding to processing contents common to other conventional video decoding methods is used.
  • the dedicated decoding processing units ex1001 and ex1002 are not necessarily specialized in the processing content specific to the present invention or other conventional standards, and may be capable of executing other general-purpose processing.
  • the configuration of the present embodiment can be implemented by LSI ex500.
  • the moving picture decoding method of the present invention the processing contents to be shared by the moving picture decoding method of the conventional standard, by sharing the decoding processing unit, to reduce the circuit scale of LSI, and cost It is possible to reduce.
  • the decoding method and the encoding method according to the present invention have an effect that the processing load can be reduced by reducing the amount of calculation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

Selon l'invention, dans un procédé de codage capable de réduire une charge de traitement par réduction de la quantité de calcul, une première transformation de fréquence est exécutée sur un signal d'entrée à l'aide d'une première matrice de transformation, un premier signal de sortie de transformation est généré, et une seconde transformation de fréquence est exécutée sur un premier signal partiel formant une partie du premier signal de sortie de transformation à l'aide d'une seconde matrice de transformation. La seconde matrice de transformation utilisée dans la seconde transformation de fréquence est une matrice obtenue par la multiplication matricielle de la matrice inverse de la première matrice de transformation par la matrice de transformation d'une transformation en une seule phase conçue sur la base d'un modèle statistique des erreurs dans un signal de prédiction plane.
PCT/JP2011/004234 2010-07-28 2011-07-27 Procédé de codage et procédé de décodage Ceased WO2012014461A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36840310P 2010-07-28 2010-07-28
US61/368,403 2010-07-28

Publications (1)

Publication Number Publication Date
WO2012014461A1 true WO2012014461A1 (fr) 2012-02-02

Family

ID=45529692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/004234 Ceased WO2012014461A1 (fr) 2010-07-28 2011-07-27 Procédé de codage et procédé de décodage

Country Status (1)

Country Link
WO (1) WO2012014461A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012096195A1 (fr) * 2011-01-14 2012-07-19 パナソニック株式会社 Procédé de codage, procédé de décodage, dispositif de codage, dispositif de décodage et dispositif de codage/décodage
CN108141597A (zh) * 2015-09-29 2018-06-08 高通股份有限公司 用于具有重组的视频译码的非可分离二次变换
WO2018199002A1 (fr) * 2017-04-28 2018-11-01 シャープ株式会社 Dispositif de codage d'image animée et dispositif de décodage d'image animée
CN113678459A (zh) * 2019-04-12 2021-11-19 北京字节跳动网络技术有限公司 基于矩阵的帧内预测的适应性
US11805275B2 (en) 2019-06-05 2023-10-31 Beijing Bytedance Network Technology Co., Ltd Context determination for matrix-based intra prediction
US11943444B2 (en) 2019-05-31 2024-03-26 Beijing Bytedance Network Technology Co., Ltd. Restricted upsampling process in matrix-based intra prediction
US12375714B2 (en) 2019-05-01 2025-07-29 Beijing Bytedance Network Technology Co., Ltd. Context coding for matrix-based intra prediction
US12375643B2 (en) 2019-04-16 2025-07-29 Beijing Bytedance Network Technology Co., Ltd. Matrix derivation in intra coding mode
US12519945B2 (en) 2019-05-22 2026-01-06 Beijing Bytedance Network Technology Co., Ltd. Matrix-based intra prediction using upsampling
US12568230B2 (en) 2019-10-28 2026-03-03 Beijing Bytedance Network Technology Co., Ltd. Syntax signaling and parsing based on colour component

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008157360A2 (fr) * 2007-06-15 2008-12-24 Qualcomm Incorporated Transformées directionnelles séparables
JP2010525675A (ja) * 2007-04-17 2010-07-22 クゥアルコム・インコーポレイテッド イントラコーディングのための方向変換

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010525675A (ja) * 2007-04-17 2010-07-22 クゥアルコム・インコーポレイテッド イントラコーディングのための方向変換
WO2008157360A2 (fr) * 2007-06-15 2008-12-24 Qualcomm Incorporated Transformées directionnelles séparables

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHUOHAO YEO ET AL.: "Mode-Dependent Fast Separable KLT for Block-based Intra Coding", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG16 WP3 AND ISO/IEC JTC1/SC29/WG11 2ND MEETING, 21 July 2010 (2010-07-21), GENEVA, CH *
MADHUKAR BUDAGAVI ET AL.: "Orthogonal MDDT and Mode Dependent DCT", ITU - TELECOMMUNICATIONS STANDARDIZATION SECTOR STUDY GROUP 16 QUESTION 6 VIDEO CODING EXPERTS GROUP (VCEG) 39TH MEETING, 17 January 2010 (2010-01-17), KYOTO, JP *
YAN YE ET AL.: "Improved Intra Coding", ITU - TELECOMMUNICATIONS STANDARDIZATION SECTOR STUDY GROUP 16 QUESTION 6 VIDEO CODING EXPERTS GROUP (VCEG) 33RD MEETING, 20 October 2007 (2007-10-20), SHENZHEN, CHINA *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012096195A1 (fr) * 2011-01-14 2012-07-19 パナソニック株式会社 Procédé de codage, procédé de décodage, dispositif de codage, dispositif de décodage et dispositif de codage/décodage
CN108141597A (zh) * 2015-09-29 2018-06-08 高通股份有限公司 用于具有重组的视频译码的非可分离二次变换
JP2018530247A (ja) * 2015-09-29 2018-10-11 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ 再編成を備えるビデオコーディングのための非分離可能２次変換
JP6995744B2 (ja) 2015-09-29 2022-01-17 クゥアルコム・インコーポレイテッド 再編成を備えるビデオコーディングのための非分離可能２次変換
CN108141597B (zh) * 2015-09-29 2022-03-08 高通股份有限公司 用于具有重组的视频译码的非可分离二次变换
WO2018199002A1 (fr) * 2017-04-28 2018-11-01 シャープ株式会社 Dispositif de codage d'image animée et dispositif de décodage d'image animée
CN113678459A (zh) * 2019-04-12 2021-11-19 北京字节跳动网络技术有限公司 基于矩阵的帧内预测的适应性
CN113678459B (zh) * 2019-04-12 2023-09-19 北京字节跳动网络技术有限公司 基于矩阵的帧内预测的适应性
US12526424B2 (en) 2019-04-12 2026-01-13 Beijing Bytedance Network Technology Co., Ltd. Calculation in matrix-based intra prediction
US11831877B2 (en) 2019-04-12 2023-11-28 Beijing Bytedance Network Technology Co., Ltd Calculation in matrix-based intra prediction
US12407829B2 (en) 2019-04-12 2025-09-02 Beijing Bytedance Network Technology Co., Ltd. Transform coding based on matrix-based intra prediction
US12284354B2 (en) 2019-04-12 2025-04-22 Beijing Bytedance Network Technology Co., Ltd. Transform coding based on matrix-based intra prediction
US12375643B2 (en) 2019-04-16 2025-07-29 Beijing Bytedance Network Technology Co., Ltd. Matrix derivation in intra coding mode
US12610037B2 (en) 2019-04-16 2026-04-21 Beijing Bytedance Network Technology Co., Ltd. Matrix derivation in intra coding mode
US12375714B2 (en) 2019-05-01 2025-07-29 Beijing Bytedance Network Technology Co., Ltd. Context coding for matrix-based intra prediction
US12563225B2 (en) 2019-05-01 2026-02-24 Beijing Bytedance Network Technology Co., Ltd. Context coding for matrix-based intra prediction
US12519945B2 (en) 2019-05-22 2026-01-06 Beijing Bytedance Network Technology Co., Ltd. Matrix-based intra prediction using upsampling
US12375679B2 (en) 2019-05-31 2025-07-29 Beijing Bytedance Network Technology Co., Ltd. Restricted upsampling process in matrix-based intra prediction
US11943444B2 (en) 2019-05-31 2024-03-26 Beijing Bytedance Network Technology Co., Ltd. Restricted upsampling process in matrix-based intra prediction
US12316871B2 (en) 2019-06-05 2025-05-27 Beijing Bytedance Network Technology Co., Ltd. Context determination for matrix-based intra prediction
US11805275B2 (en) 2019-06-05 2023-10-31 Beijing Bytedance Network Technology Co., Ltd Context determination for matrix-based intra prediction
US12568230B2 (en) 2019-10-28 2026-03-03 Beijing Bytedance Network Technology Co., Ltd. Syntax signaling and parsing based on colour component

Similar Documents

Publication Publication Date Title
JP6195179B2 (ja) 画像復号化方法および画像復号化装置
JP6384650B2 (ja) 符号化方法、符号化装置、復号方法、および復号装置
JP6327435B2 (ja) 画像符号化方法、画像復号方法、画像符号化装置、及び、画像復号装置
JP6210396B2 (ja) 復号方法および復号装置
JP2014030234A (ja) 画像符号化復号装置
WO2012108205A1 (fr) Procédé de codage d'image, dispositif de codage d'image, procédé de décodage d'image, dispositif de décodage d'image et dispositif de codage-décodage d'image
JP6004375B2 (ja) 画像符号化方法および画像復号化方法
WO2012014461A1 (fr) Procédé de codage et procédé de décodage
JP2013526199A (ja) 予測誤差から導出されるブロック形状を用いた予測符号化
JP6489337B2 (ja) 算術復号方法および算術符号化方法
JPWO2011129090A1 (ja) 符号化歪み除去方法、符号化方法、復号化方法、符号化歪み除去装置、符号化装置、および復号化装置
JP6399433B2 (ja) 画像符号化方法、画像復号方法、画像符号化装置及び画像復号装置
WO2012098868A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image, dispositif de décodage d'image et dispositif de codage/décodage d'image
WO2011132400A1 (fr) Procédé de codage d'image, et procédé de décodage d'image
WO2015015681A1 (fr) Procédé de codage d'image et dispositif de codage d'image
WO2013014884A1 (fr) Procédé de codage d'image animée, dispositif de codage d'image animée, procédé de décodage d'image animée et dispositif de décodage d'image animée
WO2012014426A1 (fr) Procédé de codage et procédé de décodage
WO2012077347A1 (fr) Procédé de décodage
WO2015001700A1 (fr) Procédé de codage d'image et dispositif de codage d'image
WO2012042810A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image, dispositif de décodage d'image et système de traitement d'image
WO2012120876A1 (fr) Procédé de décodage d'image, procédé de codage d'image, décodeur d'image et codeur d'image
WO2012096156A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image
WO2012096195A1 (fr) Procédé de codage, procédé de décodage, dispositif de codage, dispositif de décodage et dispositif de codage/décodage
WO2012053210A1 (fr) Procédé de décodage, procédé de codage, dispositif de décodage et dispositif de codage
WO2012095930A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11812063

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11812063

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP