JPH06343155A - Recorder - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a recording device which records data efficiently by performing high-efficiency encoding between a plurality of frames. [Structure] The video signal of the first frame input from the input terminal 1 is input to the high-efficiency encoder 7, the video signal is converted into an encoded block by the blocker 4, and the encoding unit converter 5 The data is converted into a coding unit, and the coding unit 6 codes each coding unit for high-efficiency coding.
The format recorder 8 sequentially records the high-efficiency encoded data of the encoded block on the magnetic tape 9 in order of visually important data. The video signal of the i-th (i ≧ 2) th frame is input to the frame memory 2 and the high efficiency encoding unit 7,
The difference is calculated by the differentiator 3 and input to the high efficiency encoding unit 7. The high-efficiency encoder 7 selects a video signal to be encoded and performs high-efficiency encoding in the same procedure as in the case of the first frame, and the format recorder 8 sequentially records it on the magnetic tape 9 from the second frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device used for highly efficient encoding and recording or transmission of a video signal.

[0002]

2. Description of the Related Art In recent years, technological development of high-efficiency coding has become a focus. The high-efficiency coding is a coding method that reduces the data amount of the video signal by utilizing the redundancy of the video signal. Often used as this high-efficiency coding method is transform coding that uses spatial redundancy, motion compensation that uses temporal redundancy, and the like.

A technique often used as transform coding is called orthogonal transform represented by DCT. This orthogonal transform is a method of collecting adjacent pixels to form an orthogonal transform block, and transforming the energy of a signal in the block so as to concentrate the energy on a specific component. A method called motion compensation is a method of reducing the information amount of a difference signal between frames by obtaining and correcting the motion between frames. When high-efficiency encoding a moving image, it is usual to perform orthogonal transform on the data obtained by performing motion compensation.

In addition to the above, without utilizing the property of the image,
There is what is called variable length coding that is performed by utilizing the characteristics of data obtained by performing transform coding and motion compensation. Usually, this variable length coding is performed for each orthogonal transform block and recorded or transmitted. Since there is a high possibility that variable-length coded data cannot be decoded when an error occurs, address information indicating which orthogonal transform block the data belongs to is recorded every fixed recording data period. We are taking countermeasures against errors.

[0005]

However, in the above-mentioned conventional configuration, since the address information is recorded, the data amount for recording the video information is reduced, so that the compression efficiency of the video signal is reduced. become.

Further, at the time of high-speed reproduction or error correction, the screen is constructed by using only the data which is highly efficient coded within the frame. However, in the conventional method, since the position on the tape of the data constituted by the information only in the frame is not specified, it is extremely difficult to distinguish and use the data in the frame on the tape.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a recording apparatus for performing high-efficiency coding between a plurality of frames and effectively recording data.

[0008]

In order to achieve this object, a first aspect of the present invention uses continuous K frames of an input video signal as one unit, and the first frame of the K frames is Information is encoded with high efficiency, and for the i-th frame (1 <i ≦ K), the information in the frame of the i-th frame or the difference information between the i-th frame and a frame other than the i-th frame is high-efficiency encoded. A recording device comprising: an efficiency coding means; and a recording means for recording the high-efficiency-encoded K frame data by dividing it into L tracks, wherein the high-efficiency coding means performs the first When high-efficiency coding is performed on a frame, the data of the first frame is divided into n coding blocks, and j consecutive blocks on the screen forming the coding block are divided into 1 blocks.
As one unit, one coding unit is formed from m blocks that are an integral multiple of j, and coding is performed in the coding unit, and when the recording unit records the first frame, the L units N recording blocks are formed at specific positions in each track of the first frame, and the encoded blocks are made to correspond to the respective blocks, and first, the first frame encoded by the high efficiency encoding means is encoded by the high efficiency encoding. Coded data of blocks are sequentially recorded in the corresponding recording block up to an EOB codeword indicating the end of the coded data, and then the coded data that could not be input to the corresponding recording block is recorded in a recording block height. When the encoded data is recorded in the corresponding recording block and there is still a free space after recording the encoded data, the recording block high frequency data is treated as the corresponding area. The recording block high-frequency data, which has been recorded in bit units in a corresponding recording block, and which has not been input to the corresponding recording block, is collected in m blocks of the encoding unit. Let the corresponding recording block be m of the coding unit.
When a group of blocks is used as a coding unit recording block, and there is still a free space after the recording block high frequency data is recorded, the coding unit high frequency data is converted into the coding unit. The recording unit is recorded on a bit-by-bit basis, and the encoding unit high frequency data that could not be input to the encoding unit recording block is recorded on a portion other than the n recording blocks in the L tracks, When the i-th frame is recorded by the recording means, the information of the i-th frame is highly efficient coded in the remaining portion of the L track after recording the encoding unit high frequency data that could not be input. The recording device is characterized in that the recording is performed by converting the data.

According to a second aspect of the present invention, two consecutive frames of an input video signal are used as one unit, the information in the first frame in the two frames is high-efficiency coded, and the second frame is encoded. , High-efficiency encoding means for high-efficiency encoding the information in the frame of the second frame or the difference information between the first frame and the second frame, and 2n pieces of the high-efficiency encoded data for two frames. A recording device comprising recording means for dividing into tracks and recording, when the high efficiency encoding means encodes the first frame with high efficiency, the data of the first frame is m ×
The coding block is divided into n coding blocks, and k blocks that are continuous on the screen forming the coding block are set as one unit, and one coding unit is formed from j blocks that are integer multiples of k. However, when the encoding is performed in the encoding unit and the first frame is recorded by the recording means,
The first half n tracks of the n tracks are each divided into m recording blocks to form a total of m × n recording blocks, and the m × n coding blocks are made to correspond to each block. First, the coded data of the coded block of the first frame, which is high-efficiency coded by the high-efficiency coding means, is sequentially recorded in the corresponding recording block up to an EOB code word indicating the end of the coded data. Next, when the encoded data that could not be input to the corresponding recording block is set as recording block high-frequency data, there is still a free space after the encoded data is recorded in the corresponding recording block. The recording block high frequency data is recorded in the corresponding recording block on a bit-by-bit basis, and further, the recording block that could not be input to the corresponding recording block. The high-frequency band data collected in j blocks of the coding unit is set as high-band data in coding unit, and the corresponding recording blocks are collected in j blocks of the coding unit. When it is a coding unit recording block, the coding unit high frequency data is recorded in bit units in the coding unit recording block which still has an empty space after recording the recording block high frequency data,
Further, when the encoding unit high-frequency data that could not be input to the encoding unit recording block is recorded on the latter half n tracks of the 2n tracks and the second frame is recorded by the recording means, the latter half n tracks are recorded. In the recording device, the information of the second frame is highly efficiently encoded and recorded in the remaining portion after recording the encoding unit high-frequency data that could not be input.

[0010]

With the above arrangement, in the recording apparatus of the first aspect of the invention, the data of n coded blocks which are highly efficient coded only by the data in the frame are stored in the fixed n number of data in the L track. Since the data is recorded in the recording block, it is not necessary to address the data in the frame, and the image quality is improved. Further, at the time of high-speed reproduction, it becomes possible to sequentially reproduce the reproduction data constituted only within the frame, and the high-speed reproduction can be easily performed. Also, with respect to a transmission path error, the variable length code is reset in the above n recording blocks, so that error propagation can be suppressed within a small range.

Further, in the recording apparatus of the second invention, high-efficiency encoding is performed within two frames, and the data in the frame is recorded on the first half n tracks of the track to be recorded. In addition, since most of the information of the first frame can be reproduced only by the first half n tracks, it is possible to perform the editing in the unit of one frame despite the compression in the unit of two frames.

[0012]

EXAMPLES Examples of the present invention will be described below.

In this embodiment, an example in which the present invention is applied to the following conditions will be described. The video signal is a high-definition television signal transmitted by the 1050/60 system sampled at a sampling frequency of 54 MHz, and is independently high-efficiency coded for each K frame and recorded.

The luminance signal of one frame is composed of 1440 horizontal pixels and 960 vertical lines, and the orthogonal transformation block is composed of data consisting of 64 horizontal 8 pixels and vertical 8 lines. As a result, the number of orthogonal transform blocks of the luminance signal per frame is 21,600.

The two color difference signals (the R-Y signal and the B-Y signal) are pixels included in the same area on the screen as the orthogonal transformation block of four adjacent luminance signals, and constitute one orthogonal transformation block. To do. One macroblock is configured by combining a total of six orthogonal transform blocks of four luminance signal orthogonal transform blocks and one RY signal block and one BY signal block at the same position on the screen.
From this, the number of macroblocks in one frame is 5,400.

In the first frame in the K frame, one coded block is composed of two macroblocks that are continuous in the horizontal direction on the screen, and this coded block is recorded in the corresponding recording block. As a result, the number of coding blocks and recording blocks in the K frame becomes 2700.

Further, the first frame in the K frame is divided into five areas by dividing the screen into five parts in the horizontal direction. In each region, one coding block is taken out at the same position in the horizontal direction and at the position offset in each region in the vertical direction to form one coding unit. The coding unit obtained from this consists of 10 macroblocks.

An embodiment of the first invention will be described below with reference to the drawings. In FIG. 1, 1 is an input terminal, 2 is a frame memory, 3 is a difference unit, 4 is a blocker, 5 is a coding unit converter, 6 is an encoder, 7 is a high-efficiency coding unit, and 8 is a format. A recorder, 9 is a magnetic tape.

First, the processing of the first frame will be described. The video signal of the first frame input from the input terminal 1 is input to the frame memory 2 and the high efficiency encoder 7. The video signal input to the high-efficiency coding unit 7 is converted into a coding block by the blocker 4, is converted into a coding unit by the coding unit converter 5, and is converted by the coding unit 6 for each coding unit. By being coded, it is highly efficient coded. The high-efficiency encoded data of the encoded block is recorded on the magnetic tape 9 by the format recorder 8 according to the recording format.

In the recording format of this embodiment, the first frame is recorded as described below.

First, high-efficiency coded data in a coded block is sequentially recorded in a corresponding recording block in order of visually important data. Data that could not be recorded by this processing is set as recording block high-frequency data.
Next, the recording block high frequency data is recorded bit by bit in the empty space of the recording block corresponding to each coded block. The recording block high-frequency data that could not be recorded by this processing is a coding unit high-frequency data, and the recording blocks corresponding to the coding unit are a coding unit recording block. Further, the coding unit high-frequency data is recorded in bit units in the empty space of the coding unit recording block. In this way, the entire recording area in the recording block prepared for the first frame is used. Finally, when the coding unit high-frequency data that is the data of the first frame remains after the recording of the recording block prepared for the first frame is finished, the recording other than the recording block is performed. Record those data in the area.

Next, the processing of the second and subsequent frames (hereinafter, i-th frame (1 <i ≦ K)) will be described.

The video signal of the i-th frame input from the input terminal 1 is input to the frame memory 2 and the high-efficiency encoding unit 7 and at the same time, the video of the previous frame output from the frame memory 2 by the differentiator 3. The difference from the signal is calculated and input to the high efficiency encoding unit 7. In the high efficiency encoding unit 7,
The video information of the i-th frame, the i-th frame and the (i-
1) Select one of the difference information with the frame,
High efficiency coding is performed in the same procedure as in the case of the first frame.
The highly efficient encoded i-th frame is recorded on the magnetic tape 9 by the format recorder 8 based on the recording format. In the recording format of the i-th frame of this embodiment, the i-th frame is sequentially recorded from the second frame in the remaining recording area in which the first frame is recorded.

FIG. 2 is an explanatory diagram of a recording format in one embodiment of the first invention. FIG. 2 shows a format in which continuous 4 frames of data are recorded on 40 tracks on a magnetic tape. The first 20 tracks can be used for the first frame recording block and the second 20 tracks can be recorded on the recording block. It is used as a recording area for recording the missing first frame data and the second to fourth frame data. At this time, the recording block is a block formed by dividing each track into 135,
The number of recording blocks is 2,700.

With this structure, the first frame is highly efficiently coded in the frame, and the recording block is composed of visually important data. Further, since the data of n encoded blocks is recorded in fixed n recording blocks in the L track, it is not necessary to address the data in the frame, and the image quality is improved. In addition, during high-speed reproduction, it is possible to sequentially reproduce the reproduction data configured only within the frame, and high-speed reproduction can be easily performed. By effectively arranging the data, the image quality during high-speed reproduction is improved. It is also possible. Also, with respect to a transmission path error, the variable length code is reset in the above n recording blocks, so that error propagation can be suppressed within a small range.

In this embodiment, the difference value from the input video signal delayed by one frame at the time of input is obtained.
It is also possible to use the difference value from the video signal which is delayed by one frame and is highly efficient encoded and reproduced. Further, the frame for which the difference is obtained is not limited to one frame before, but it is also possible to use a plurality of adjacent frames.

Further, in FIG. 2, 4 frames of data are recorded on 40 tracks, but the number of frames to be recorded and the number of tracks to be recorded may be other configurations.

Next, an embodiment of the second invention will be described with reference to the drawings. In FIG. 3, 11 is an input terminal, 12 is a frame memory, 13 is a differentiator, 14 is a blocker, 1
Reference numeral 5 is an encoding unit converter, 16 is an encoder, 17 is a high-efficiency encoder, 18 is a format recorder, 19 is a magnetic tape, and 20 is a decoder.

First, the processing of the first frame will be described. The video signal of the first frame input from the input terminal 11 is input to the high efficiency encoding unit 17. In the high efficiency coding unit 17, the blocker 14 converts the coded blocks, and the coding unit converter 15 converts the coded blocks.
High-efficiency coding is performed by the encoder 16 by coding for each coding unit.

The high-efficiency coded data of the coded block is recorded on the magnetic tape 19 by the format recording section 18 in accordance with the recording format. The data of the first frame, which has been subjected to the high efficiency encoding by the high efficiency encoding unit 17, is decoded by the decoder 20 and input to the frame memory 12.

In the recording format of this embodiment, the first frame is recorded as described below.

First, high-efficiency coded data of a coded block is sequentially recorded in a corresponding recording block in order of visually important data. Data that could not be recorded by this processing is set as recording block high-frequency data.
Next, the recording block high frequency data is recorded bit by bit in the empty space of the recording block corresponding to each coded block. The recording block high-frequency data that could not be recorded by this processing is a coding unit high-frequency data, and the recording blocks corresponding to the coding unit are a coding unit recording block. Further, the coding unit high-frequency data is recorded in bit units in the empty space of the coding unit recording block. In this way, the entire recording area in the recording block prepared for the first frame is used. Finally, when the coding unit high-frequency data that is the data of the first frame remains after the recording of the recording block prepared for the first frame is finished, the recording other than the recording block is performed. Record those data in the area.

Next, processing of the second and subsequent frames (hereinafter, i-th frame (1 <i ≦ K)) will be described.

The video signal of the second frame inputted from the input terminal 11 is supplied to the frame memory 12 and the high efficiency coding unit 1.
At the same time, the difference from the video signal of the previous frame output from the frame memory 2 is calculated by the differentiator 13 and input to the high efficiency encoding unit 7. The high-efficiency coding unit 7 selects either the video information of the second frame or the difference information between the second frame and the first frame, and performs the high-efficiency coding in the same procedure as in the case of the first frame. Turn into.

The high-efficiency coded data of the second frame is based on the recording format and is recorded by the format recorder 1.
8 is recorded on the magnetic tape 19. In the second frame recording format of this embodiment, the second frame is sequentially recorded in the remaining recording area in which the first frame is recorded.

FIG. 4 is an explanatory diagram of a recording format in an embodiment of the second invention. FIG. 4 shows a format in which two consecutive frames of data are recorded on 40 tracks on a magnetic tape. The first half 20 tracks are used for the first frame recording block, and the second half 20 tracks cannot be recorded on the recording block. It is used as a recording area for recording the first frame data and the second frame data. At this time, the number of recording blocks becomes 2700 by making the recording blocks into blocks formed by dividing each track into 135.

With this structure, the first frame is highly efficiently coded within the frame, and the recording block is composed of visually important data. Further, since the data of n encoded blocks is recorded in fixed n recording blocks in the L track, it is not necessary to address the data in the frame, and the image quality is improved. In addition, during high-speed reproduction, it is possible to sequentially reproduce the reproduction data configured only within the frame, and high-speed reproduction can be easily performed. By effectively arranging the data, the image quality during high-speed reproduction is improved. It is also possible. Also, with respect to a transmission path error, the variable length code is reset in the above n recording blocks, so that error propagation can be suppressed within a small range.

Further, high-efficiency coding is performed within two frames,
Since the data in the frame is recorded on the first half n tracks of the track to be recorded, most of the information of the first frame can be reproduced only by the first half n tracks.
Despite the compression in frame units, editing can be performed in frame units.

Further, in the first and second embodiments, two macroblocks consecutive in the horizontal direction on the screen are used as coding blocks to form a coding unit, which is used in the current television. It is possible to share the circuit forming the coding unit.

Although the input signal used in the first and second embodiments is a 1050/60 high-definition television signal sampled at a sampling frequency of 54 MHz, it is sampled at another sampling frequency. It goes without saying that the present invention can also be applied to the other high-definition television signals of the above-mentioned types. It is also possible to use motion compensation when obtaining the difference with respect to the input image.

[0041]

As described above, the recording apparatus of the first invention uses continuous K frames of the input video signal as one unit, and for the first frame of the K frames, the information in the frame is enhanced. Efficiency coding, i-th frame (1 <i
≦ K), high-efficiency coding means for high-efficiency coding information within the i-th frame or difference information between the i-th frame and frames other than the i-th frame, and the high-efficiency coded K A recording device comprising recording means for recording data for a frame by dividing it into L tracks, wherein when the high efficiency encoding means encodes the first frame with high efficiency, the first frame Data is divided into n coding blocks, and the recording means configures n recording blocks at specific positions in the L tracks, and the recording blocks are associated with the coding blocks. By recording and recording the information of the i-th frame with high-efficiency coding in the extra portion after recording the first frame, the first frame is highly-efficiency-coded within the frame, and the recording block is Since it is composed of important data, and the data of n encoded blocks is recorded in fixed n recording blocks in the L track, it is not necessary to address the data in the frame, and the image quality is improved. Is improved.

Further, at the time of high-speed reproduction, it becomes possible to sequentially reproduce the reproduction data constituted only within the frame, so that the high-speed reproduction can be easily carried out, and by effectively arranging the data, the high-speed reproduction can be performed. It is also possible to improve the image quality. Also, with respect to a transmission path error, the variable length code is reset in the above n recording blocks, so that error propagation can be suppressed within a small range.

In the recording apparatus of the second invention, two consecutive frames of the input video signal are set as one unit, and for the first frame of the two frames, information in the frame is highly efficiently coded, and For two frames, high-efficiency coding means for high-efficiency coding the information in the frame of the second frame or the difference information between the first frame and the second frame, and the high-efficiency coded data for two frames. 2
In a recording device having recording means for dividing and recording into n tracks, when the high efficiency encoding means performs high efficiency encoding of the first frame, the data of the first frame is m × The recording means divides into n coding blocks, and the first half of the 2n tracks are divided into m recording blocks by the recording means to form a total of m × n recording blocks. When recording is performed in correspondence with the m × n coded blocks and each block and the second frame is recorded by the recording means, the coding unit in which the first frame cannot be input in the second half n tracks. By recording the information of the second frame with high efficiency coding in the remaining portion after recording the high frequency data,
The first frame is highly efficient coded within the frame, the recording blocks are composed of visually important data, and the data of n coded blocks are recorded in fixed n recording blocks in the L track. Since there is no need to add an address to the data in the frame, the image quality is improved.

Further, during high speed reproduction, it becomes possible to sequentially reproduce the reproduction data constituted only within the frame,
High-speed reproduction can be easily performed, and by arranging data effectively, it is possible to improve the image quality during high-speed reproduction. Also, with respect to a transmission path error, the variable length code is reset in the above n recording blocks, so that error propagation can be suppressed within a small range. Also, the first half n of the track to be recorded by performing high-efficiency encoding within 2 frames
Since the data in the frame is recorded on the track, most of the information of the first frame can be reproduced only by the first half n tracks. You can edit.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment according to a recording apparatus of a first invention.

FIG. 2 is a recording format diagram of an embodiment according to the recording apparatus of the first invention.

FIG. 3 is a block diagram of an embodiment according to the recording apparatus of the second invention.

FIG. 4 is a recording format diagram of an embodiment according to the recording apparatus of the second invention.

[Explanation of symbols]

 1, 11 Input terminal 2, 12 Frame memory 3, 13 Differentiator 4, 14 Blocker 5, 15 Coding unit converter 6, 16 Encoder 7, 17 High efficiency coding unit 8, 18 Format recorder 9 , 19 Magnetic tape 20 Decoder

Claims (3)

[Claims] 1. A continuous K frame of an input video signal is used as one unit, and for the first frame in the K frame, information in the frame is highly efficiently encoded to obtain an i-th frame (1 <i ≦ K). With regard to the above, a high-efficiency coding means for high-efficiency coding the information in the frame of the i-th frame or the difference information between the i-th frame and a frame other than the i-th frame, and the high-efficiency-coded K frames worth of Data is L
A recording device comprising recording means for dividing and recording into a plurality of tracks, wherein when the first frame is high efficiency encoded by the high efficiency encoding means, the data of the first frame is encoded by n codes. Divided into encoded blocks, and j blocks that are continuous on the screen forming the encoded block are defined as one unit,
When one coding unit is formed from m blocks that are integer multiples of j, coding is performed in the coding unit, and the first frame is recorded by the recording unit,
The n recording blocks are formed at specific positions in the L tracks to correspond to the coding blocks on a block-by-block basis. First, the high-efficiency coding means performs the high-efficiency coding on the first frame. The encoded data of the encoded blocks of are sequentially recorded up to the EOB codeword indicating the end of the encoded data in the corresponding recording blocks, and then the encoded data that cannot be input to the corresponding recording blocks are recorded. When recording block high frequency data is used, if there is still an empty space after recording the encoded data in the corresponding recording block, the recording block high frequency data is stored in the corresponding recording block in bit units. The recording block high-frequency data that could not be input to the corresponding recording block is collected in m blocks of the encoding unit. Things were a coding unit high frequency data,
When the corresponding recording block is a collection of m blocks of the coding unit as a coding unit recording block, and when there is still an empty space after the recording block high frequency data is recorded, , The encoding unit high frequency data is recorded in the encoding unit recording block in bit units, and the encoding unit high frequency data that cannot be input to the encoding unit recording block is stored in the L tracks. When recording the i-th frame in the portion other than the n recording blocks of
A recording apparatus, characterized in that, in the L track, the information of the i-th frame is subjected to high-efficiency encoding and recorded in a surplus portion after recording the encoding unit high-frequency data that could not be input. 2. The n recording blocks are concentrated on the first half track of the L tracks.
The recording device described. 3. Two consecutive frames of an input video signal are set as one unit, the information in the first frame of the two frames is highly efficient coded, and the second frame of the second frame is encoded. High-efficiency coding means for high-efficiency coding the information in the frame or the difference information between the first frame and the second frame, and dividing the high-efficiency coded data for two frames into 2n tracks. A recording device comprising recording means for recording, wherein when the first frame is highly efficiently encoded by the high efficiency encoding means, the data of the first frame is m × n
The coding block is divided into k coding blocks, and k blocks that are continuous on the screen forming the coding block are set as one unit, and one coding unit is formed from j blocks that are integer multiples of k. When the first frame is recorded by the recording unit by performing the encoding in the encoding unit, the first half n tracks of the 2n tracks are respectively m tracks.
The recording block is divided into a total of m × n recording blocks, and the m × n coding blocks are made to correspond to each block. First, high efficiency coding is performed by the high efficiency coding means. EOB indicating the end of the encoded data in order of the encoded data of the encoded block of the first frame
Even the code word is recorded in the corresponding recording block, and then, when the encoded data that could not be input to the corresponding recording block is set as recording block high frequency data, the encoded data is recorded in the corresponding recording block. If there is still a free space after recording, the recording block high frequency band data is recorded in the corresponding recording block in bit units, and the recording block high frequency band that could not be input to the corresponding recording block. The data collected in j blocks of the coding unit is coding unit high-frequency data,
When the corresponding recording blocks are collected by j blocks of the coding unit as a coding unit recording block, the coding unit high frequency data is recorded even after the recording block high frequency data is recorded. It is recorded bit by bit in the coding unit recording block which still has an empty space, and further, the coding unit high frequency data which could not be input to the coding unit recording block is recorded in the latter half n tracks of the 2n tracks. When recording the second frame by the recording means,
In the latter half n tracks, the second portion is recorded in the remaining portion after the encoding unit high frequency data that could not be input is recorded.
A recording device, characterized in that frame information is encoded with high efficiency and recorded.