JPH09154111A - Muse decoder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the decoder in which a conventional FIFO memory is used for a frame memory and number of the FIFO memories in use is minimized. SOLUTION: A frame memory 2 is made up of field memories 21f-24f being FIFO memories. A luminance signal and a color difference signal are given to the frame memory 2 in a form of a TCI signal and motion vector correction is applied to both the luminance signal and the color difference signal. When a motion vector signal is detected by a control signal detection section 9, a color difference signal mix section 5b selects only a output of a color difference signal moving image processing section 4b by the processing of a color difference signal moving area detection section 6b and only in-field interpolation is applied to the processing for the color difference signal to conduct full moving image processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a MUSE decoder which decodes a MUSE signal.

[0002]

2. Description of the Related Art Band-compressing high-definition television signals,
MUSE as a method of transmitting on one channel of satellite broadcasting
There is a method. In the MUSE method, a moving area and a still area of an image are detected, and different sub-sampling and interpolation are performed respectively. Field decoding (spatial interpolation) is performed in the decoding processing of the signal in the moving area, but inter-frame interpolation and inter-field interpolation (temporal interpolation) are performed in the decoding processing of the signal in the still area. Requires signals for 4 fields including the current field. Therefore, a frame memory is required for the MUSE decoder that decodes the MUSE signal.

FIGS. 6 and 7 are block diagrams showing a configuration example of a MUSE decoder. First, the MUSE decoder shown in FIG. 6 will be described. In Figure 6, the incoming MUS
The E signal is subjected to pre-processing such as AD conversion and de-emphasis by the input processing unit 1 and supplied to the frame memory 2, the still image processing unit 3, the moving image processing unit 4, and the moving area detection unit 6. The frame memory 2 is an interpolation memory and is composed of field memories 21 to 24. The still image processing unit 3 receives the signal of the current field output from the input processing unit 1 and a total of 4 signals that have passed through the field memories 21, 22, and 23.
Inter-frame interpolation and inter-field interpolation are performed using signals for fields. The moving image processing unit 4 performs field interpolation using only the current field signal. The moving area detection unit 6 outputs the signal of the current field and the signal of the previous frame which is the output of the field memory 22 and the field memory 24.
The two-frame difference, one-frame difference, and the like are generated using the signal of two frames before, which is the output of, and the moving region is detected. The outputs of the still image processing unit 3 and the moving image processing unit 4 are input to the mixing unit 5 and adaptively mixed according to the output of the moving area detection unit 6. The output of the mixing unit 5 is output via the output processing unit 7. In addition,
In the portions of the still image processing unit 3 to the moving region detection unit 6, the luminance signal and the color difference signal are actually processed separately, but the processing is simplified here.

Next, the MUSE decoder shown in FIG. 7 will be described. In FIG. 7, the incoming MUSE signal is subjected to pre-processing such as AD conversion and de-emphasis by the input processing unit 1 and supplied to the inter-frame interpolation switch 8, the moving image processing unit 4, and the moving area detection unit 6. The output of the inter-frame interpolation switch 8 is input to the frame memory 2 and the still image processing unit 3. Here, the frame memory 2 which is a memory for interpolation is composed of field memories 25 and 26. The output of the field memory 25 is input to the still image processing unit 3, and the output of the field memory 26 is the moving region detection unit 6.
And the inter-frame interpolation switch 8.

The inter-frame interpolating switch 8 outputs the output of the input processing unit 1 (current field signal) and the output of the frame memory 2 (signal one frame before) based on the phase of the sub-sampled signal transmitted as a control signal. Interframe interpolation is performed by switching (the signal in which the signal two frames before is interpolated). That is, the inter-frame interpolation switch 8 selects the signal one frame before from the signal one frame before and the signal two frames before output from the output of the field memory 26. The current field signal and the signal one frame before are output.
The still image processing unit 3 performs inter-field interpolation using the output of the inter-frame interpolation switch 8 and the output of the field memory 25 obtained by delaying the signal by one field. The moving image processing unit 4 performs field interpolation using only the current field signal. The outputs of the still image processing unit 3 and the moving image processing unit 4 are input to the mixing unit 5 and adaptively mixed according to the output of the moving area detection unit 6. The output of the mixing unit 5 is output via the output processing unit 7. In addition, although the still image processing unit 3 to the moving region detection unit 6 actually processes the luminance signal and the color difference signal separately, they are illustrated in a simplified manner here.

By the way, in the MUSE method, a process called motion vector correction is performed in the interpolation of the signal in the still region. In the signal processing of the moving area in the MUSE decoder, since the decoded signal is obtained by field interpolation, its resolution is inferior to the signal of the still area. However, the blur of a moving object is not a problem due to the human visual characteristic that it is not so noticeable. However, when a large part of the screen such as the panning of the camera moves at a constant speed and at a constant speed, this blur may be noticeable. Therefore, to prevent this, the encoder side detects the motion vector of the entire screen, transmits it in the form of a control signal, and the decoder side corrects the position during interpolation processing of the still image according to the value. , When most of the screen is moving in the same direction, it can be processed as a still image, and blurring can be reduced.

The position correction (motion vector correction) of the interpolation processing by the motion vector is usually a memory (frame memory 2 in FIGS. 6 and 7) for obtaining a signal used for still image interpolation on the decoder side. It is realized by controlling the read address of (1) by the motion vector correction amount by the motion vector signal transmitted as the control signal.

In the MUSE system, the motion vector correction is performed on the luminance signal, but the motion vector correction is not performed on the color difference signal due to the difference in time compression ratio with the luminance signal. Therefore, in the MUSE decoder, in order to apply the motion vector correction only to the luminance signal (in order not to apply the vector correction to the color difference signal),
1 frame before signal for still image processing and 2 for motion detection
The frame memory 2 for obtaining the signal before the frame usually has two output ports for one input port, and a read address can be controlled separately for each of the luminance signal and the color difference signal. Of memory is used.

Since this dedicated memory is not a general-purpose product,
It is a considerable burden from the viewpoint of cost when configuring the MUSE decoder. Therefore, as a method that does not use a dedicated memory, there is a method that uses a FIFO operation memory that is widely used for image processing. In this case, in order to apply the motion vector correction to the signal one frame before used for inter-frame interpolation, the phase of the write and read reset of the frame memory is controlled by the motion vector signal. A general-purpose FIFO memory has only one pair of input / output ports and cannot change the phase of writing and reading reset independently for each of the luminance signal and the color difference signal. It is impossible to pass it through a memory and delay it by one frame for use in interpolation.

Therefore, in order to prevent the motion vector correction from being applied to the chrominance signal, the frame memory 2 shown in FIGS. 6 and 7 is prepared separately for the chrominance signal and the luminance signal, and is used for still image interpolation. You have to get a signal for. A configuration example of the MUSE decoder in this case is shown in FIGS. First, for the MUSE decoder having the configuration shown in FIG. 6, the configuration of FIG. 8 in which two systems of the frame memory 2 are separately prepared for the color difference signal and the luminance signal will be described. FIG.
In, the control signal detection unit 9 detects the motion vector signal, and the brightness interpolation memory control unit 10 is detected according to the detected value.
The control of a is changed to control the reading of the frame memory 2A for the luminance signal configured by the FIFO memory to perform the motion vector correction. The frame memory 2A is composed of field memories 21a to 24a which are FIFO memories. The color difference interpolation memory control unit 10b, which controls the frame memory 2B for color difference signals, supplies a constant control pulse to the field memories 21b to 24b configured by the FIFO memory irrespective of the motion vector value to generate color difference signals. Does not apply motion vector correction.

The luminance signals are the luminance signal still image processing unit 3a, the luminance signal moving image processing unit 4b, and the luminance signal mixing unit 5.
a, the luminance signal moving area detection unit 6a performs the same processing as in FIG. 6 described above, and the color difference signals are color difference signal still image processing units 3b, color difference signal moving image processing units 4b, and color difference signal mixing units 5.
b, the color difference signal moving area detection unit 6b performs the same processing as in FIG. 6 described above. The outputs of the luminance signal mixing unit 5a and the color difference signal mixing unit 5b are output via the output processing unit 7.

Next, for the MUSE decoder having the configuration shown in FIG. 7, the configuration of FIG. 9 in which two systems of the frame memory 2 are separately prepared for the color difference signal and the luminance signal will be described. In this case, the frame memory 2A for the luminance signal is composed of the field memories 25a and 26a, and the frame memory 2B for the color difference signal is composed of the field memories 25b and 26b. Also in this case, the control signal detection unit 9 detects the motion vector signal, the control of the luminance interpolation memory control unit 10a is changed according to the value, the reading of the frame memory 2A configured by the FIFO memory is controlled, and the motion vector signal is controlled. Make a correction. The color difference interpolation memory control unit 10b, which controls the frame memory 2B for color difference signals, sends a constant control pulse to the frame memory 2B regardless of the motion vector value.
, So that the motion vector correction is not applied to the color difference signal.

The output of the input processing unit 1 is input to the inter-frame interpolation switch 8a for the luminance signal, the luminance signal moving image processing unit 4a, the luminance signal moving area detecting unit 6a, and the control signal detecting unit 9. The inter-frame interpolation switch 8a outputs the current field signal and the signal one frame before as described above. The luminance signal still image processing unit 3a performs inter-field interpolation by using the output of the inter-frame interpolation switch 8a and the output of the field memory 25a obtained by delaying the signal by one field. The luminance signal moving image processing unit 4a performs field interpolation using only the signal of the current field.
The outputs of the luminance signal still image processing unit 3a and the luminance signal moving image processing unit 4a are input to the luminance signal mixing unit 5a and adaptively mixed according to the output of the luminance signal moving area detection unit 6a.

On the other hand, the output of the input processing unit 1 includes the inter-frame interpolating switch 8b for the color difference signal and the color difference signal moving image processing unit 4
b, it is also input to the color difference signal moving area detection unit 6b. The inter-frame interpolation switch 8b outputs the signal of the current field and the signal of the previous frame as described above. The color difference signal still image processing unit 3b includes a field memory 2 in which the output of the inter-frame interpolation switch 8b and its signal are delayed by one field.
Inter-field interpolation is performed using the output of 5b. The color difference signal moving image processing unit 4b performs field interpolation using only the current field signal. The outputs of the color difference signal still image processing unit 3b and the color difference signal moving image processing unit 4b are input to the color difference signal mixing unit 5b and adaptively mixed according to the output of the color difference signal moving region detection unit 6b. The outputs of the luminance signal mixing unit 5a and the color difference signal mixing unit 5b are output via the output processing unit 7.

The conventional MUSE decoder shown in FIGS. 6 and 7 performs a motion vector correction process which is generally performed. By the way, if the signal of the current field is called the 0th field, and the signal obtained by delaying this by 1, 2 and 3 fields is called the signal of the 1st field, 2nd field and 3rd field, this is used for processing still images. Since the signals of the four fields from the 0th field to the 3rd field are used for the interpolation, the center phase of the decoded image is between the first field and the second field. On the other hand, since the signal of the 0th field is usually used for processing a moving image,
A shift of 1.5 fields occurs between the center phase of the moving image and the still image. In the motion vector correction by the MUSE decoder shown in FIGS. 6 and 7, there is a deviation between the center phase of the still image and the center phase of the motion vector correction.

Therefore, by using the signal of the second field for decoding the moving image and considering the second field as the center of the motion vector correction, the deviation between the center phase of the still image and the center phase of the motion vector correction is zero. There is a MUSE decoder designed to have .5 fields. When considering the second field as the center of motion vector correction,
It is necessary to correct the 0th field signal toward the 2nd field signal. In this case, it is necessary to correct the position of the signal of the 0th field and interpolate between frames while the signal of the 2nd field remains in its original position. For that purpose, it is necessary to pass the signal of the 0th field through the memory before inter-frame interpolation, and change the delay amount according to the value of the motion vector signal to correct the position. Further, since the signal of the 0th field is not in the original position when the position is corrected, the signal is delayed by 2 fields through the memory, and at the same time, the position is corrected in the opposite direction to the previous correction, and the original position is corrected. Return to. Such motion vector correction is called reverse motion vector correction.

FIGS. 10 and 11 are block diagrams showing a configuration example of the MUSE decoder adapted to perform the inverse motion vector correction processing described above. 10 and 11, the same parts as those in FIGS. 6 and 7 are designated by the same reference numerals, and the description thereof will be appropriately omitted. First, MUSE shown in FIG.
The decoder will be described. In FIG. 10, the incoming MUSE signal is subjected to pre-processing such as AD conversion and de-emphasis by the input processing unit 1 and supplied to the position correction memory 11 and the control signal detection unit 9. The control signal detector 9 detects a motion vector signal and a sub-sample signal. The motion vector signal is the position correction memory controller 1
2 and the 1-frame delay unit 13 that delays the motion vector signal by 1 frame. The sub-sampled signal is input to the 1-frame delay unit 14 that delays the sub-sampled signal by 1 frame.

The position correction memory control unit 12 controls the delay amount in the position correction memory 11 based on the motion vector signal detected by the control signal detection unit 9 to correct the position of the input signal. The output of the position correction memory 11 is supplied to the frame memory 2, the still image processing unit 3, and the moving area detection unit 6. The interpolation memory control unit 10 determines, based on the output of the 1-frame delay unit 13 that delays the motion vector signal used by the position correction memory control unit 12 by 1 frame,
The phase of the reset pulse for writing / reading of the field memory 2 is controlled and motion vector correction is applied.

The still image processing unit 3 and the moving image processing unit 4 have 1
The output of the frame delay unit 14 is supplied. The still image processing unit 3 passes through the field memories 21, 22 and 23 in addition to the signal of the 0th field whose position is corrected toward the signal one frame before in the position correction memory 11, and is the reverse of the previous correction. Inter-frame interpolation and inter-field interpolation are performed on the basis of the output of the one-frame delay unit 13 by using signals for a total of four fields, that is, the signals of the first field to the third field whose position is corrected in the direction. The moving image processing unit 4 uses the signal of the second field output from the field memory 22 to
Field interpolation is performed based on the output of the frame delay unit 14. The moving area detection unit 6 uses the signal of the 0th field output from the position correction memory 11 and the output of the frame memory 2 (field memory 24) to generate a 2-frame difference, a 1-frame difference, etc. To detect. The operation subsequent to this is the same as that in FIG. 6, and in reality, the luminance signal and the color difference signal are processed separately, as in FIG.

Next, the MUSE decoder shown in FIG. 11 will be described. 11, the operations of the input processing unit 1, the control signal detection unit 9, the position correction memory 11, the position correction memory control unit 12, the one-frame delay unit 13, and the one-frame delay unit 14 are the same as those in FIG. The output of the position correction memory 11 is input to the interframe interpolation switch 8. The output of the inter-frame interpolation switch 8 is output from the frame memory 2, the still image processing unit 3, the moving image processing unit 4, the moving area detection unit 6
Supplied to The interpolation memory control unit 10 uses the output of the 1-frame delay unit 12 that delays the motion vector signal used by the position correction memory control unit 12 by 1 frame to determine the phase of the reset pulse for writing / reading the field memories 25 and 26. Control and apply motion vector correction. Here, the output of the field memory 26 is position-corrected in the opposite direction to the correction by the position-correction memory 11.

The inter-frame interpolation switch 8 is set to 1 in the position correction memory 11 on the basis of the inter-frame sub-sampling phase of the output of the 1-frame delay unit 13 which delays the sub-sampling signal detected by the control signal detecting section 1 by 1 frame.
Interpolation between frames is performed by switching the position-corrected signal of the 0th field toward the signal before the frame and the output of the field memory 26 (the signal of the 2nd field and the signal of the 4th field interpolated). I do. That is,
The fourth field signal input from the field memory 26 is replaced with the 0th field signal and output.

The still picture processing unit 3 uses the output of the interframe interpolating switch 8 and the output of the frame memory 25 obtained by delaying the signal of the interframe interpolating switch 8 by one field, and the one frame delay unit 14
Inter-field interpolation is performed based on the output of. Video processing unit 4
The signal of the second field is extracted from the output of the inter-frame interpolation switch 8 based on the output of the one-frame delay unit 14, and the field interpolation is performed using only the signal of the one field. The moving area detection unit 6 uses the outputs of the inter-frame interpolation switch 8 and the frame memory 2 to generate a 2-frame difference, a 1-frame difference, etc., and detects a moving area. The operation subsequent to this is the same as that in FIG. 7, and in reality, the luminance signal and the color difference signal are processed separately, as in FIG. 7.

In FIGS. 10 and 11, the motion vector correction between fields is omitted for simplification. Further, not only field interpolation using a signal for one field for moving image processing but also processing between fields called a frame completion type may be performed.

Frame memory 2 in FIGS. 10 and 11
12 and 13 show the configuration when a general-purpose FIFO memory is used as the position correction memory 11. When a FIFO memory is used as the frame memory 2 and the position correction memory 11, the frame memory 2 and the position correction memory 11
It is necessary to separately prepare two systems for the color difference signal and the luminance signal. 12 and 13, the luminance signal is F
Luminance signal position correction memory 11 composed of IFO memory
a, input to the frame memory 2A for luminance signal. These memories 11a and 2A are controlled by the luminance signal position correction memory control unit 12a and the luminance interpolation memory control unit 10a to be read by the value of the motion vector signal, and the position correction toward the signal of the second field is performed. Done.

On the other hand, the color difference signal is input to the color difference signal simple delay memory 11b composed of a FIFO memory and the color difference signal frame memory 2B. These memories 11
b and 2B are controlled by the color difference signal memory control unit 12b and the color difference interpolation memory control unit 10b, respectively. That is,
The color difference signal memory control unit 12b and the color difference interpolation memory control unit 10b supply a constant control pulse to the memories 11b and 2B irrespective of the value of the motion vector signal so that the above position correction is not applied to the color difference signal. To do. Then, the brightness signal includes a brightness signal still image processing unit 3a and a brightness signal moving image processing unit 4
a, the luminance signal mixing unit 9a, the luminance signal moving area detection unit 6a, and the color difference signal is the color difference signal still image processing unit 3b,
The color difference signal moving image processing unit 4b, the color difference signal mixing unit 9b, and the color difference signal moving region detection unit 6b perform the same processing as in FIGS. 10 and 11, and output through the output processing unit 7.

[0026]

A MUSE decoder using a FIFO memory as the frame memories 2A and 2B as shown in FIGS. 8 and 9, and the frame memories 2A and 2B and luminance signals as shown in FIGS. FIFO as the position correction memory 11a and the color difference signal simple delay memory 11b
In a MUSE decoder using a memory, it is necessary to prepare separate FIFO memories for a luminance signal and a color difference signal for motion vector correction, which results in a considerable cost burden and an increase in board area. There is a problem that it ends up. The present invention has been made in view of the above problems, and a MUSE decoder that uses a general-purpose FIFO memory as an interpolating frame memory and a position correction memory and that can minimize the use of the FIFO memory is provided. The purpose is to provide.

[0027]

In order to solve the above-mentioned problems of the prior art, the present invention provides (1) a control signal detecting section for detecting a control signal included in a MUSE signal, and one frame before and two frames before. A frame memory for obtaining the previous video signal and a memory control for controlling the writing / reading of the frame memory by the motion vector signal in the control signal detected by the control signal detection unit to perform the motion vector correction. Section, a still image processing section that interpolates a luminance signal and a color difference signal, a moving image processing section that interpolates a luminance signal and a color difference signal, and a moving area detection that detects a motion component of an image. Section, according to the output signal of the moving area detection unit, for the luminance signal and the color difference signal,
In a MUSE decoder provided with a mixing unit that adaptively mixes the output signal of the still image processing unit and the output signal of the moving image processing unit, a FIFO memory is used as the frame memory, and a luminance signal and a color difference signal are stored in the frame memory. Both are input to perform motion vector correction on both the luminance signal and the color difference signal, and when the motion vector signal is detected by the control signal detection unit, only the output signal of the moving image processing unit is processed for the color difference signal. The present invention provides a MUSE decoder characterized by being configured by providing a means for processing all moving images by using (2) a control signal detection unit for detecting a control signal included in a MUSE signal, and a MUS.
Writing of the position correction memory by a delay correction variable position correction memory for correcting the position of the signal processed by the input processing unit and a motion vector signal in the control signal detected by the control signal detection unit A first memory control unit that controls reading to perform a first motion vector correction, a frame memory that delays the output of the position correction memory by one frame and two frames, and one frame of the motion vector signal Based on the delayed signal, writing to the frame memory
A second control for controlling reading so as to perform a second motion vector correction in a direction opposite to the first motion vector correction
Memory control unit, a still image processing unit that interpolates a luminance signal and a color difference signal, a moving image processing unit that interpolates a luminance signal and a color difference signal, and detects a motion component of an image A moving region detecting unit, and a mixing unit for adaptively mixing the output signal of the still image processing unit and the output signal of the moving image processing unit with respect to the luminance signal and the color difference signal in accordance with the output signals of the moving region detecting unit. In the MUSE decoder including, a FIFO memory is used as the position correction memory and the frame memory, and a luminance signal and a color difference signal are both input to these memories to perform motion vector correction on both the luminance signal and the color difference signal. At the same time, the color difference is calculated using the motion vector signal detected by the control signal detector and a signal obtained by delaying the signal by n (n is a positive integer) field. A color difference signal processing change processing section for generating a control signal for changing the signal processing method, and means for performing all moving image processing of the color difference signal processing using only the output signal of the moving image processing section according to the control signal. Provide a MUSE decoder characterized by being provided and configured, (3) MUS
A control signal detection unit for detecting a control signal included in the E signal, a position correction memory with a variable delay amount for correcting the position of the signal obtained by processing the MUSE signal in the input processing unit, and the control signal detection unit for detection. By the motion vector signal in the control signal
A first memory control unit that controls writing / reading of the position correction memory to perform a first motion vector correction, and a signal obtained by delaying the sub-sample signal detected by the control signal detection unit by one frame. Thus, the output of the position correction memory and the signal delayed by one frame are switched to obtain an interframe-interpolated signal, and the output of the interframe interpolation switch is delayed by one frame. Based on a frame memory to be controlled and a signal obtained by delaying the motion vector signal by one frame to control writing / reading of the frame memory to perform a second direction in the opposite direction to the first motion vector correction.
Second memory control unit that controls to perform the motion vector correction of the image, a still image processing unit that interpolates the luminance signal and the color difference signal, and a moving image that interpolates the luminance signal and the color difference signal, respectively. An output signal of the still image processing unit and the moving image for a luminance signal and a color difference signal according to an output signal of the processing unit, a moving region detection unit that detects a moving component of an image, and the moving region detection unit, respectively. In a MUSE decoder including a mixing unit that adaptively mixes output signals of a processing unit, a FIFO memory is used as the position correction memory and the frame memory, and a luminance signal and a color difference signal are both input to these memories to obtain a luminance signal. And the color difference signal are subjected to motion vector correction, and the phase of the inter-frame interpolation of the color difference signal in the inter-frame interpolation switch is set to the motion vector signal Color difference signal inter-frame phase control section controlled by the following, a motion vector signal detected by the control signal detection section, and a method of processing a color difference signal using the signal obtained by delaying the signal by n (n is a positive integer) field And a color difference signal processing change processing section for generating a control signal for changing the color difference signal, and means for processing all color moving picture signals according to the control signal using only the output signal of the moving picture processing section. The present invention provides a MUSE decoder characterized by the above.

[0028]

DETAILED DESCRIPTION OF THE INVENTION A MUSE decoder of the present invention will be described below with reference to the accompanying drawings. 1 is a block diagram showing a first embodiment of the MUSE decoder of the present invention, FIG. 2 is a block diagram showing a second embodiment of the MUSE decoder of the present invention, and FIG. 3 is a third embodiment of the MUSE decoder of the present invention. FIG. 4 is a block diagram showing the fourth embodiment of the MUSE decoder of the present invention, and FIG. 5 is a MUSE decoder of the present invention.
It is a figure for demonstrating operation | movement of 4th Example of a decoder. 1 to 4, the same parts as those in FIGS. 6 to 13 are designated by the same reference numerals.

First, the principle of the present invention will be described. One possible method for constructing a structure in which separate FIFO memories are not used for the luminance signal and the color difference signal is to apply motion vector correction to the color difference signal. If the motion vector correction is performed on the color difference signal in the same manner as the brightness signal, both the brightness signal and the color difference signal as the TCI signal are passed through the same frame memory or position correction memory, and writing / reading is performed according to the motion vector amount. The motion vector correction for the luminance signal is realized only by controlling the resetting of the color signal, and the frame memory 2B (field memories 21b to 24b or 25b and 26b) for the color difference signals in FIGS. Color difference signal frame memory 2B and color difference signal simple delay memory 11
b is no longer needed.

However, a problem here is that a problem occurs due to the motion vector correction being applied to the color difference signals. Since the color difference signal and the luminance signal have different horizontal sampling rates (compression rates),
If the same amount of horizontal motion vector correction is applied, the chrominance signal moves four times as much as the luminance signal, and the interpolation processing of the still image of the chrominance signal fails. Moreover, since the color difference signals are line-sequentially multiplexed, the hue may change when vertical motion vector correction is applied and a still image is interpolated. For example, if the color difference signal is subjected to vector correction of +1 in the vertical direction and inter-frame interpolation is performed, since BY and RY are alternately multiplexed for each line, the still image interpolation is performed. The signals will be a mixture of BY and RY signals. Since the motion detection for this signal is not always determined as the moving region, the still image signal may be selected by the color difference signal mixing unit 5b, and the hue changes.

Therefore, in the case of the circuit configuration in which the motion vector correction is also applied to the color difference signal as described above, when the motion vector signal is detected, it is impossible to interpolate the still image processing for the color difference signal. , Signals for moving image processing (for example, field interpolation) are used for the color difference signals. The structure of the MUSE decoder of the present invention which performs such processing is shown in FIGS. 1 and 2 as a structure corresponding to FIGS. 8 and 9 and in FIGS. 3 and 4 as a structure corresponding to FIGS. , Will be described in detail.

First, the first embodiment shown in FIG. 1 will be described. In FIG. 1, the incoming MUSE signal is subjected to pre-processing such as AD conversion and de-emphasis by the input processing unit 1, and in the form of a TCI signal, a frame memory 2, a luminance signal still image processing unit 3a, a luminance signal moving image processing unit. 4a, a luminance signal moving area detecting unit 6a, a color difference signal still image processing unit 3b, a color difference signal moving image processing unit 4b, a color difference signal moving area detecting unit 6b, and a control signal detecting unit 9. The frame memory 2 which is a memory for interpolation is composed of field memories 21f to 24f which are FIFO memories. The interpolation memory control unit 10 controls the phase of the reset pulse for writing / reading of the frame memory 2 (field memories 21f to 24f) based on the motion vector signal detected by the control signal detection unit 9 to realize motion vector correction. To do. This motion vector signal is used as a color difference signal motion area detection unit 6b.
Is also entered.

The luminance signal still image processing unit 3a uses the signals for the current field output from the input processing unit 1 and the signals for a total of four fields that have passed through the field memories 21f, 22f, and 23f, so that the inter-frame Interpolation and inter-field interpolation. The luminance signal moving image processing unit 4a performs field interpolation using only the signal of the current field. The luminance signal moving area detection unit 6a uses the signal of the current field, the signal of one frame before output from the field memory 22f, and the signal of two frames before output from the field memory 24f to calculate a two-frame difference, a one-frame difference, and the like. Is generated and the moving area of the luminance signal is detected. The outputs of the luminance signal still image processing unit 3a and the luminance signal moving image processing unit 4a are input to the luminance signal mixing unit 5a and adaptively mixed according to the output of the luminance signal moving area detection unit 6a.

Similarly, the color-difference signal still image processing unit 3b uses the signals of the current field output from the input processing unit 1 and the signals of four fields in total passing through the field memories 21f, 22f, and 23f. Inter-frame interpolation and inter-field interpolation are performed. The color difference signal moving image processing unit 4b
Field interpolation is performed using only the current field signal. The color difference signal moving area detection unit 6b uses the signal of the current field, the signal of one frame before output from the field memory 22f, and the signal of two frames before output from the field memory 24f to calculate a two-frame difference, a one-frame difference, etc. Is generated and the moving area of the color difference signal is detected. The outputs of the color difference signal still image processing unit 3b and the color difference signal moving image processing unit 4b are input to the color difference signal mixing unit 5b and adaptively mixed according to the output of the color difference signal moving region detection unit 6b.

At this time, the color difference signal moving area detecting section 6b is
When the control signal detection unit 9 detects a motion vector signal, the color difference signal mixing unit 5b is controlled so that the color difference signal processing is the entire moving image processing. That is, when the motion vector signal is detected, in the color difference signal, only the output of the color difference signal moving image processing unit 4b is selected and only the field interpolation is performed. The outputs of the luminance signal mixing unit 5a and the color difference signal mixing unit 5b are output via the output processing unit 7. By performing the above-described processing, when the motion vector correction is applied, the color difference signal is processed as a moving image, so that it is possible to prevent a problem such as a change in hue. At this time, although the color resolution is reduced, the sensitivity of the human eye to the resolution of the color signal is not as good as that of the luminance signal, so that the adverse effect is small. Moreover, since the motion vector correction is applied to the luminance signal, the resolution does not change, and as a result, the amount of frame memory can be effectively reduced.

Next, a second embodiment shown in FIG. 2 will be described. The second embodiment is an MU having a configuration as shown in FIG.
The principle of the present invention is applied to an SE decoder. In FIG. 2, the incoming MUSE signal is subjected to preprocessing such as AD conversion and de-emphasis by the input processing unit 1, and T
Interframe interpolating switch 8, luminance signal still image processing unit 3a, luminance signal moving image processing unit 4b, luminance signal moving region detecting unit 6a, color difference signal moving image processing unit 4b, color difference signal moving region detecting unit 6b in the form of a CI signal, It is input to the control signal detector 9. The output of the inter-frame interpolation switch 8 is input to the frame memory 2, the luminance signal still image processing unit 3b, and the color difference signal still image processing unit 3b. Here, the frame memory 2 is FI
It is composed of field memories 25f and 26f which are FO memories. The interpolation memory controller 10 uses the motion vector signal detected by the control signal detector 9 to detect the frame memory 2 (field memories 25f, 26).
The phase of the reset pulse for writing / reading of f) is controlled to realize the motion vector correction. This motion vector signal is also input to the color difference signal motion area detection unit 6b.

The output of the field memory 25f is input to the luminance signal still image processing unit 3a, the luminance signal moving region detection unit 6a, the color difference signal still image processing unit 3b, and the color difference signal moving region detection unit 6b, and the output of the field memory 26f is It is input to the luminance signal moving area detecting unit 6a, the color difference signal moving area detecting unit 6b, and the inter-frame interpolation switch 8. Interframe switch 8
Is an output of the input processing unit 1 (current field signal) and an output of the frame memory 2 (one frame before signal and two frames before signal are interpolated based on the phase of the sub-sampled signal transmitted as the control signal). Interpolation is performed by switching between That is, the inter-frame interpolation switch 8 selects the signal one frame before from the signal one frame before and the signal two frames before output from the output of the field memory 26f. The current field signal and the signal one frame before are output.

The luminance signal still image processing unit 3a performs inter-field interpolation using the output of the inter-frame interpolation switch 8 and the output of the field memory 25f which delays the signal by one field. The luminance signal moving image processing unit 4a performs field interpolation using only the signal of the current field. The outputs of the luminance signal still image processing unit 3a and the luminance signal moving image processing unit 4a are input to the luminance signal mixing unit 5a and adaptively mixed according to the output of the luminance signal moving area detection unit 6a. On the other hand, the color-difference signal still image processing unit 3b performs inter-field interpolation using the output of the inter-frame interpolation switch 8 and the output of the field memory 25f obtained by delaying the signal by one field. The color difference signal moving image processing unit 4b performs field interpolation using only the current field signal. The outputs of the color difference signal still image processing unit 3b and the color difference signal moving image processing unit 4b are input to the color difference signal mixing unit 5b and adaptively mixed according to the output of the color difference signal moving region detection unit 6b.

At this time, the color difference signal moving area detecting section 6b
When the control signal detection unit 9 detects a motion vector signal, the color difference signal mixing unit 5b is controlled so that the color difference signal processing is the entire moving image processing. That is, when the motion vector signal is detected, in the color difference signal, only the output of the color difference signal moving image processing unit 4b is selected and only the field interpolation is performed. The outputs of the luminance signal mixing unit 5a and the color difference signal mixing unit 5b are output via the output processing unit 7. By performing the above-described processing, when the motion vector correction is applied, the color difference signal is processed as a moving image, so that it is possible to prevent a problem such as a change in hue. At this time, although the color resolution is reduced, the sensitivity of the human eye to the resolution of the color signal is not as good as that of the luminance signal, so that the adverse effect is small. Moreover, since the motion vector correction is applied to the luminance signal, the resolution does not change, and as a result, the amount of frame memory can be effectively reduced.

Further, the third and fourth embodiments shown in FIGS. 3 and 4 will be described. 3 and 4 show a general-purpose FI for the position correction memory 11 and the frame memory 2 in FIGS.
It is configured using a FO memory. In FIG. 3, the incoming MUSE signal is subjected to preprocessing such as AD conversion and de-emphasis by the input processing unit 1, and the position correction memory 11 and the control signal detection unit 9 in the form of a TCI signal.
Supplied to The position correction memory 11 is composed of a FIFO memory. The control signal detector 9 detects a motion vector signal and a sub-sample signal. The motion vector signal is input to the position correction memory control unit 12 and the 1-frame delay unit 13 that delays the vector signal by 1 frame. The sub-sampled signal is input to the 1-frame delay unit 14 that delays the sub-sampled signal by 1 frame.

The position correction memory control unit 12 controls the delay amount in the position correction memory 11 based on the motion vector signal detected by the control signal detection unit 9 to correct the position of the input signal. The output of the position correction memory 11 is the frame memory 2, the luminance signal still image processing unit 3a, the color difference signal still image processing unit 3b, the luminance signal moving area detection unit 6a,
It is supplied to the color difference signal moving area detection unit 6b. The frame memory 2 is a field memory 21f which is a FIFO memory.
24f. The interpolation memory control unit 10 uses the output of the 1-frame delay unit 13 that delays the motion vector signal used by the position correction memory control unit 12 by 1 frame to determine the phase of the reset pulse for writing / reading the field memories 21f to 24f. Control and apply motion vector correction.

The output of the one-frame delay unit 14 is supplied to the luminance signal still image processing unit 3a, the color difference signal still image processing unit 3b, the luminance signal moving image processing unit 4a, and the color difference signal moving image processing unit 4b. The luminance signal still image processing unit 3a includes the position correction memory 1
In addition to the signal of the 0th field whose position is corrected toward the signal one frame before by 1, the field memories 21, 2
Based on the output of the 1-frame delay unit 13, a total of four fields of signals of the first field to the third field, which have been position-corrected in the opposite direction to the previous correction, are passed through Interpolation and interfield interpolation are performed.
The luminance signal moving image processing unit 4a performs field interpolation based on the output of the 1-frame delay unit 14 using the second field signal output from the field memory 22f.
The luminance signal moving area detection unit 6a uses the signal of the 0th field output from the position correction memory 11 and the frame memory 2
Using the output of the (field memory 24f), a 2-frame difference, a 1-frame difference, etc. are generated to detect a moving area.

The outputs of the brightness signal still image processing unit 3a and the brightness signal moving image processing unit 4a are input to the brightness signal mixing unit 5a, and are adaptively mixed according to the output of the brightness signal moving area detection unit 6a.

On the other hand, with respect to the color difference signal, the same processing is performed in the color difference signal still image processing unit 3b, the color difference signal moving image processing unit 4b, the color difference signal mixing unit 5b, and the color difference signal moving area detection unit 6b.

A motion vector signal is input from the control signal detection unit 9 to the color difference signal processing change control unit 15. Based on the input motion vector signal, the color difference signal processing change control unit 15 generates a control signal for controlling the processing of the color difference signal in the color difference signal mixing unit 5b to be the entire moving image motion processing, and the color difference signal motion area detection unit 6b. Supply to. By the way, in the MUSE decoder configured as shown in FIG. 3, the position correction memory 11 performs motion vector correction on the signal of the 0th field toward the second field, and the signal of the 0th field passes through the field memories 21f and 22f. Since the position is corrected in the direction opposite to the previous direction while being delayed by one frame, the control signal generated by the color difference signal processing change control unit 15 is the input motion vector signal and the input motion vector signal n (n Is a positive integer) Among the signals delayed by the field, the signal is controlled as described above when at least one is not 0, and n must include at least 1 and 2.

When the motion vector signal is detected by the control signal detecting unit 9, the color difference signal mixing unit 5b selects only the signal of the color difference signal moving image processing unit 4b under the control of the color difference signal moving region detecting unit 6b, and the color difference signal The processing of the signal is only the field interpolation using the signal for one field, which is one frame before the input signal, and the whole moving picture processing is performed. In this embodiment, the control signal generated by the color difference signal processing change control unit 15 is supplied to the color difference signal moving area detection unit 6b.
It may be supplied to the color difference signal mixing unit 5b. In short, when the motion vector signal is detected, the color difference signal processing may be all moving image dynamic processing, and the embodiment thereof is arbitrary.

The output of the luminance signal mixing section 5a and the output of the color difference signal mixing section 5b thus processed are output through the output processing section 7.

Next, a fourth embodiment shown in FIG. 4 will be described. 4, the operations of the input processing unit 1, the control signal detection unit 9, the position correction memory 11, the position correction memory control unit 12, the one-frame delay unit 13, and the one-frame delay unit 14 are the same as those in FIG. The output of the position correction memory 11 is input to the interframe interpolation switch 8. The output of the inter-frame interpolation switch 8 is the frame memory 2, the luminance signal still image processing unit 3a, the color difference signal still image processing unit 3b, the luminance signal moving image processing unit 4a, the luminance signal moving area detection unit 6a, and the color difference signal moving area detection. It is supplied to the section 6b. Frame memory 2
Are field memories 25f and 26 which are FIFO memories.
It is composed of f. ,

The interpolation memory control unit 10 resets the writing / reading of the field memories 25f and 26f based on the output of the 1-frame delay unit 12 that delays the motion vector signal used in the position correction memory control unit 12 by 1 frame. Control the pulse phase and apply motion vector correction.

Unlike the configuration of FIG. 3, in the configuration of FIG. 4, after inter-frame interpolation is performed by the inter-frame interpolation switch 8, the interpolated signal is delayed by the frame memory 2,
Although the signal of the second field, which is the center of the motion vector correction, is obtained, one problem arises here. As described above, when the motion vector correction is applied to the color difference signals, only the signal of the second field, which is the central phase of the color difference signals, is in the correct phase, and therefore, the one that can be used for processing the color difference signals is the first phase. It is a two-field signal only. However, similarly to the circuit shown in FIG. 13, the position-corrected signal of the 0th field is interframe-interpolated by the interframe interpolating switch 8, and the signal is delayed by one frame in the frame memory 2 and, at the same time, in the previous direction. With the method of obtaining the signal of the second field by performing the position correction in the opposite direction to, it is not possible to obtain the signal of the second field in which the color difference signal has returned to the correct phase.

For the luminance signal, the motion vector is detected on the encoder side, the inter-frame interpolation phase is determined based on the value, and this is transmitted to the decoder side as a control signal, but the motion vector is added to the color difference signal. The correction is a phenomenon that occurs because the MUSE decoder shown in FIG. about this,
An example in which the motion vector is corrected in the horizontal direction by one pixel will be described with reference to FIG.

FIG. 5 shows the positional relationship of the subsample values of the color difference signal of the MUSE signal. FIG.
(A) is the signal of the 0th field of the 16.2 MHz rate before the inter-frame interpolation of the input to the position correction memory 11. In this signal, the inter-frame sub-sampling phase of the color difference signal obtained from the control signal is at the position indicated by the bold circle in the figure. When this signal is subjected to horizontal position correction in the position correction memory 11 for one pixel at a rate of 32.4 MHz, the result in FIG. 5B.

If the position-corrected signal is interpolated by the inter-frame interpolation switch 8 to the inter-frame sub-sampling phase obtained from the control signal, that is, the position of the bold circle in FIG. The signal of the 0th field is replaced with the signal of the 4th field which is the input signal from the memory 25f, and the sampling position of the signal output from the interframe interpolation switch 8 is shown in FIG.
(C). Circled 0 is the 0th field,
Indicates a signal in the second field, and indicates a signal in the fourth field.

When this is passed through the field memories 25f and 26f and the position is corrected in the opposite direction to the position correction performed by the position correction memory 11, the signal becomes a sample position as shown in FIG. The signal of the second field (the signal of 0 circled in FIG. 5D) that should be interpolated at the position of the bold circle in FIG. 5A before correction is in the opposite phase to that position. Will be in. In other words, regarding the color difference signal subjected to the motion vector correction, after the interframe interpolation, the interframe interpolation switch 8 is set so that the second field signal delayed by one frame through the field memories 25f and 26f returns to the correct phase. It is also necessary to control the phase of the interframe interpolation performed in.

Now, returning to FIG. 5B again, the interframe interpolating switch is set so that the positional relationship of the samples in the field is correct at the position where the position-corrected signal of the 0th field is moved in parallel. Interpolate by 8. That is, when the interpolation is performed so as to make the best use of the bold circle signals in FIG. 5B, the result is as shown in FIG. When the signal thus interpolated is passed through the field memories 25f and 26f to be delayed by one frame, and the position is corrected in the opposite direction to the position correction performed by the position correction memory 11, the signal of the second field becomes as shown in FIG. The position becomes 0 surrounded by a thick circle in (f), and the original correct phase can be restored.

That is, the position correction memory 11 is set to 1 in the horizontal direction.
In the inter-frame interpolation switch 8, the signal of the 0th field in which only the position of the pixel is corrected is compared with the signal in which the signal of the 2nd field and the signal of the 4th field, which are the inputs from the frame memory 2, are interpolated. Control signal detector 9
It should be replaced with a position (position with the signal of the second field) that is exactly opposite to the phase (position with the signal of the fourth field) to be interpolated based on the inter-sample sub-sampling phase of the color difference signal detected in. I have to.

The signal of the 0th field placed in the phase opposite to the original position passes through the frame memory 2 and is delayed by one frame, and the position is corrected in the direction opposite to the direction corrected by the position correction memory 11. Field memory 2
The signal of the second field at the output of 5f will return to the original phase. However, after this signal passes through the inter-frame interpolation switch 8, the signal of the next 0th field is replaced with the position of the second field as shown in FIG. Is not the output signal of the inter-frame interpolation switch 8 but the output signal of the frame memory 2 (the signal of the second field and the signal of the fourth field are interpolated in the normal case without motion vector correction). It is necessary to extract only the signal of the second field from the signal and interpolate the field.

By the way, the method of controlling the inter-frame interpolation phase of the color difference signal in the inter-frame interpolation switch 8 is as follows.
In FIG. 5, the case where the motion vector correction is applied in the horizontal direction by one pixel has been described, but the same can be applied to other correction amounts, and the inter-frame interpolation phase of the color difference signal is inverted every frame and every two lines. In consideration of this, 2SB (the second bit from the most significant bit) of 3 bits of the vertical vector signal of the motion vector signal and the LSB (least significant bit) of the 3 bits of the vertical vector signal change line by line. When the three 1-bit signals of the logical product of the signals and the LSB of the 4 bits of the horizontal vector signal are used and the number of the signals is 1 is an odd number, what is the original phase of interframe interpolation? It only has to be reversed.

In FIG. 4, this control is performed by the color difference signal inter-frame phase controller 16. Further, as described above, since the output of the inter-frame interpolation switch 8 cannot be used for the moving image processing of the color difference signal, the output of the frame memory 2 is supplied to the color difference signal moving image processing unit 4b.

In summary, the inter-frame interpolation switch 8 outputs the luminance signal frame output from the 1-frame delay unit 14 for delaying the sub-sample signal detected by the control signal detection unit 9 by 1 frame for the luminance signal. 1 in the position correction memory 11 based on the inter-subsample phase
Interpolation between frames is performed by switching the position-corrected signal of the 0th field to the signal before the frame and the output of the frame memory 2 (the signal of the 2nd field and the signal of the 4th field interpolated). . That is, the fourth field signal output from the frame memory 2 is replaced with the 0th field signal and output. On the other hand, regarding the color difference signal, the interpolation phase is controlled by the instruction of the color difference signal inter-frame phase control unit 16, and the signal of the fourth field is not necessarily replaced with the signal of the zero field and output.

The luminance signal still image processing unit 3a uses the output of the interframe interpolating switch 8 and the output of the field memory 25f which delays the signal by one field, based on the output of the one-frame delay unit 14 Interpolate. The luminance signal moving image processing unit 4a extracts the signal of the second field from the output of the inter-frame interpolation switch 8 based on the output of the one-frame delay device 14, and uses only the signal for the one field to interpolate the field. I do. The luminance signal moving area detection unit 6a uses the outputs of the inter-frame interpolation switch 8 and the frame memory 2 to calculate the difference between the two frames,
One frame difference or the like is generated to detect a moving area. The outputs of the luminance signal still image processing unit 3a and the luminance signal moving image processing unit 4a are input to the luminance signal mixing unit 5a and adaptively mixed according to the output of the luminance signal moving area detection unit 6a.

Regarding the color difference signal, the color difference signal still image processing unit 3b, the color difference signal moving image processing unit 4b, and the color difference signal mixing unit 5 are also included.
b, the color difference signal moving area detection unit 6b performs the same processing, but as described above, the output signal of the frame memory 2 is used for the processing of the color difference signal moving image processing unit 4b.

As in the case of FIG. 3, the color difference signal processing change control unit 15 uses the signal for one field one frame before the input signal for the color difference signal according to the value of the motion vector signal. Control is performed so that only moving images are processed by interpolation. The output of the luminance signal mixing unit 5a and the output of the color difference signal mixing unit 5b are output via the output processing unit 7.

By the way, the MUSE shown in FIG. 3 and FIG.
Like a decoder, a MUSE decoder having a circuit configuration in which motion vector correction is applied to the second field signal, a FIFO memory is used as the frame memory 2, and vector correction is also applied to color difference signals On the other hand, when the inter-field processing is performed by using not only the signal for one field before one frame but also the signals for the fields before and after that, the control output from the color difference signal processing change control unit 15 is performed. Only by controlling the processing of the color difference signal to the whole moving image processing by the signal, the signal of the moving area includes not only the signal of the second field but also the signals of the fields before and after the second field, which causes a failure in the decoded image. Come on. Therefore, in such a case, the processing of the color difference signal in the color difference signal moving image processing unit 4b is performed by the control signal output from the color difference signal processing change control unit 15 for one field one frame before the input signal. MUS is further provided with means for field interpolation using signals.
Configure an E decoder.

With the above processing, the color difference signals are processed as moving images when motion vector correction is applied.
Although the color resolution is reduced, the sensitivity of the human eye in the resolution of the color signal is not as good as that of the luminance signal, so that the harmful effect is small. Moreover, since the motion vector correction is applied to the luminance signal, the resolution does not change, and the amount of memory can be reduced.

[0066]

As described in detail above, the M of the present invention
The USE decoder uses a FIFO memory as a frame memory, inputs both a luminance signal and a color difference signal to the frame memory to perform motion vector correction on both the luminance signal and the color difference signal, and also uses a control signal detection unit to detect a motion vector. When a signal is detected, since the means for processing the moving image processing of the color difference signal is provided, the frame memory has a dedicated read address control for each of the luminance signal and the color difference signal. Since it is not necessary to use a memory, the cost can be reduced, and it is not necessary to provide separate FIFO memories for the luminance signal and the color difference signals, and it is sufficient to prepare a single-system frame memory common to the luminance signal and the color difference signals. It further contributes to cost reduction and substrate area reduction.

The position correction memory is also provided in the MUSE decoder which is provided with the position correction memory and the frame memory, and is configured so that the shift of the center phase between the moving image and the still image is 0.5 field by the position correction by these memories. A FIFO memory is used as a frame memory and a frame memory, and a luminance signal and a color difference signal are input to the position correction memory and the frame memory to perform motion vector correction on both the luminance signal and the color difference signal. When the motion vector signal is detected, the processing of the color difference signal is performed by providing a means for processing all moving images, so that the read address is controlled separately for each of the luminance signal and the color difference signal as a position correction memory or a frame memory. There is no need to use a dedicated memory that can Separate FI into a luminance signal and color difference signal
Since it is not necessary to provide an FO memory and one system of position correction memory and frame memory common to the luminance signal and the color difference signal may be prepared, the cost and the board area can be further reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a diagram for explaining the operation of the fourth exemplary embodiment of the present invention.

FIG. 6 is a block diagram showing a conventional example.

FIG. 7 is a block diagram showing a conventional example.

8 is a block diagram showing a configuration when a FIFO memory is used in the conventional example shown in FIG.

FIG. 9 is a block diagram showing a configuration when a FIFO memory is used in the conventional example shown in FIG.

FIG. 10 is a block diagram showing another conventional example.

FIG. 11 is a block diagram showing another conventional example.

12 is a block diagram showing a configuration when a FIFO memory is used in the conventional example shown in FIG.

13 is a block diagram showing a configuration when a FIFO memory is used in the conventional example shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Input processing unit 2 Frame memory 3a Luminance signal still image processing unit 3b Color difference signal still image processing unit 4a Luminance signal moving image processing unit 4b Color difference signal moving image processing unit 5a Luminance signal mixing unit 5b Color difference signal mixing unit 6a Luminance signal moving region detection unit 6b Color difference signal moving area detecting section 7 Output processing section 8 Interframe interpolating switch 9 Control signal detecting section 10 Interpolation memory control section (second memory control section) 11 Position correction memory (FIFO memory) 12 Position correction memory control Section (first memory control section) 13,14 1 frame delay unit 15 color difference signal processing change control section 16 color difference signal inter-frame phase control section 21f to 24f, 25f, 26f field memory (FIFO memory)

Claims (6)

[Claims] 1. A control signal detector for detecting a control signal included in a MUSE signal, a frame memory for obtaining a video signal of one frame before and two frames before, and a control signal detected by the control signal detector. A memory control unit that controls the writing / reading of the frame memory to perform a motion vector correction by the motion vector signal in the above, and a still image processing unit that interpolates the luminance signal and the color difference signal, respectively. A moving image processing unit that respectively interpolates a signal and a color difference signal, a moving region detection unit that detects a moving component of an image, and a luminance signal and a color difference signal according to an output signal of the moving region detection unit. And a mixing unit adapted to adaptively mix the output signal of the still image processing unit and the output signal of the moving image processing unit. In the USE decoder, a FIFO memory is used as the frame memory, and a luminance signal and a color difference signal are both input to the frame memory to perform motion vector correction on both the luminance signal and the color difference signal. A MUSE decoder, characterized in that, when a motion vector signal is detected, processing for color difference signals is provided with means for processing all moving images using only the output signals of the moving image processing section. 2. A control signal detector for detecting a control signal included in a MUSE signal, a position correction memory with a variable delay amount for correcting the position of a signal obtained by processing the MUSE signal in an input processor, and the control. A first memory control unit that controls writing / reading of the position correction memory to perform a first motion vector correction by a motion vector signal in the control signal detected by the signal detection unit; and the position correction memory And a frame memory for delaying the output of the frame vector by one frame and two frames, and a direction opposite to the first motion vector correction by controlling writing / reading of the frame memory based on a signal obtained by delaying the motion vector signal by one frame. A second memory control unit that controls to perform the second motion vector correction of A still image processing unit that interpolates the signals and the color difference signals, a moving image processing unit that interpolates the luminance signals and the color difference signals, and a moving region detection unit that detects a motion component of the image, In a MUSE decoder including a mixing unit that adaptively mixes an output signal of the still image processing unit and an output signal of the moving image processing unit with respect to a luminance signal and a color difference signal according to an output signal of a moving region detection unit, respectively. FI as the position correction memory and the frame memory
A FO memory is used, and a luminance signal and a color difference signal are both input to these memories to perform motion vector correction on both the luminance signal and the color difference signal, and the motion vector signal detected by the control signal detection unit and its A color difference signal processing change processing unit that generates a control signal that changes the method of processing the color difference signal using a signal obtained by delaying the signal by n (n is a positive integer) field is provided. An MUSE decoder, characterized in that means for processing all moving images using only the output signal of the moving image processing section is provided. 3. A control signal detecting section for detecting a control signal included in the MUSE signal, a position correction memory with a variable delay amount for correcting the position of the signal obtained by processing the MUSE signal by the input processing section, and the control. A first memory control unit that controls writing / reading of the position correction memory to perform a first motion vector correction by a motion vector signal in the control signal detected by the signal detection unit, and the control signal detection Inter-frame interpolation for obtaining an inter-frame interpolated signal by switching between the output of the position correction memory and the signal obtained by delaying the sub-sample signal detected by the unit by one frame A switch and a frame memo for delaying the output of the interframe interpolating switch by one frame And a control for performing a second motion vector correction in a direction opposite to the first motion vector correction by controlling writing / reading of the frame memory based on a signal obtained by delaying the motion vector signal by one frame. Second memory control unit, a still image processing unit that interpolates the luminance signal and the color difference signal, a moving image processing unit that interpolates the luminance signal and the color difference signal, and a motion component of the image According to the output signal of the moving area detection unit for detecting the, the output signal of the still image processing unit and the output signal of the moving image processing unit are adaptively mixed with respect to the luminance signal and the color difference signal, respectively. And a FI as the position correction memory and the frame memory.
An FO memory is used, and a luminance signal and a color difference signal are both input to these memories to perform motion vector correction on both the luminance signal and the color difference signal, and the inter-frame interpolation of the color difference signal in the inter-frame interpolation switch is performed. A color difference signal inter-frame phase control unit for controlling the phase of the motion vector signal according to the value of the motion vector signal, a motion vector signal detected by the control signal detection unit, and a signal obtained by delaying the signal by n (n is a positive integer) field. And a color difference signal processing change processing unit that generates a control signal that changes the method of processing the color difference signal using, and the processing of the color difference signal is performed using only the output signal of the moving image processing unit according to the control signal. A MUSE decoder characterized by being provided with a means for processing a moving image. 4. The MU according to claim 2 or 3.
In the SE decoder, the color difference signal processing change processing unit includes a motion vector signal detected by the control signal detection unit and a signal obtained by delaying the signal by n (n is a positive integer) field,
The MUSE decoder, wherein the control signal is generated when at least one is not 0, and n includes at least 1 and 2. 5. The MUSE decoder according to claim 3, wherein the chrominance signal inter-frame phase control unit is 2SB of 3 bits of a vertical vector signal in the motion vector signal,
Three 1-bit signals of the logical product of the LSB of the vertical vector signal of 3 bits and the signal that changes for each line and the LSB of the horizontal vector signal of 4 bits are used, and the number of the signal value is 1. A MUSE decoder which controls so as to invert the phase of interframe interpolation when the number is odd. 6. The MU according to any one of claims 2 to 5.
In the SE decoder, the moving image processing unit outputs 1 to the input MUSE signal.
When the inter-field processing is performed by using not only the signal for one field before the frame but also the fields before and after that, the processing of the color difference signal in the moving image processing unit is performed according to the control signal. The MUSE decoder further comprises means for performing field interpolation using only the signal for one field before one frame with respect to the input MUSE signal.