JP2015146473A - Encoding device and decoding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manage memory for prediction information on a decoding device, and optimize the management to enable the reproduction of a larger amount of moving images at the same time.SOLUTION: In an encoding device 1A including picture memory 17 for prediction reference in order to perform prediction encoding to moving image information including a plurality of temporally continuous frames, a reversible compression processing unit 16 calculates a compressibility ratio CR through compression processing performed by the unit in a frame unit and supplies the compressibility ratio to a compressibility ratio update unit 20. When the compressibility ratio update unit 20 receives the input of a compressibility ratio CR smaller than the compressibility ratio CR held therein, updates the compressibility ratio CR held therein to the new compressibility ratio CR and stores the updated compressibility ratio CR. The compressibility ratio update unit 20 performs such processing over the frames constituting single moving images. Thus, by the time of the completion of the processing for a single moving image, the compressibility ratio update unit 20 will have the worst compressibility ratio WCR. The compressibility ratio update unit 20 outputs the worst compressibility ratio WCR to a second variable-length coding unit 21 in a moving image unit.

Description

  The present invention relates to an encoding device and a decoding device, and in particular, when encoding and decoding moving image information using predictive encoding, for a memory storing image information for prediction reference, The present invention relates to an encoding device and a decoding device that store the image information after compression processing.

  In the encoding process of moving picture information composed of a plurality of temporally continuous frames, a prediction code including motion compensation is used to increase the encoding efficiency by using the characteristic of similarity of images close in time. It is very common sense to make it. In order to realize such inter-frame predictive encoding, the encoded information of the already encoded frame is returned by decoding so that the information of the already encoded frame can be used for encoding of another frame. Thus, a memory (storage means) for temporarily storing the data is required. The same applies to the decoding device side, and the decoding information of the already decoded frame is temporarily stored in the memory so that the information of the already decoded frame can be used for decoding another frame. Keep it.

  Recently, for example, “4K”, moving images have become extremely fine, and the amount of information constituting one frame has become extremely large. Accordingly, the memory capacity as described above must be increased accordingly.

  On the other hand, particularly in the display of moving images in a gaming machine such as a pachinko machine, there is a process in which a plurality of moving image streams are superimposed on one screen or a plurality of screens, or are displayed simultaneously in parallel. Often done. Even in such a case, in the encoding apparatus (encoding process) and decoding apparatus described above, it is necessary to store necessary frame information in parallel for each moving picture. Therefore, from this point of view, it is necessary to devise how to use the limited capacity of the memory for predictive coding. In particular, it is highly necessary in a typical decoding apparatus that is configured by hardware to perform high-speed real-time processing.

  From the above situation, in recent years, the information is compressed and stored in a memory for storing information of a frame necessary for predictive coding, and when used, it is read and decompressed before use. Such a method is also adopted. Although the necessary processing or circuit increases, this is more meaningful from the viewpoint of reducing the memory capacity or effectively utilizing the limited memory bandwidth. Such a technique of compressing frame information necessary for predictive encoding and storing it in a memory is disclosed in Patent Document 1, for example. This document discloses a decoding device. For example, as shown in FIG. 1, the frame memory 102 for storing information of a frame used for predictive encoding includes an encoding circuit 101. The information compressed and encoded by is stored, and when it is used for prediction in the predicted image generation circuit 26, it is expanded and supplied by the second data expansion circuit 105b. The circuit that realizes the specific device shown in FIGS. 13 and 16 is the same as the base.

JP-A-9-261635

  By the way, in Patent Document 1, lossy compression is employed as a compression technique for storing frame information necessary for predictive coding in a memory (an orthogonal transform circuit 201 and a quantizer 202 in FIG. 2 and the like). ). The disadvantage of adopting this lossy compression is that when prediction is performed cumulatively between frames, the distortion of the image also increases accordingly. Therefore, when priority is given to a certain level of image quality, lossless compression can be adopted as the compression technique. However, it is inferior from the viewpoint of efficiently storing information in a limited memory capacity.

  Here, regardless of which lossy compression or lossless compression is adopted as a compression technique for storing frame information necessary for predictive coding in a memory, a memory capacity failure (especially decoding) It is necessary to design in advance so as not to bring the device side. In particular, in the case of lossless compression, since the compression rate after compression varies depending on the input image, it is necessary to secure a memory with an uncompressed size in consideration of the case where a material that cannot be compressed is input. The same applies to lossy compression that guarantees a certain image quality.

  Assuming that the memory capacity is ensured in this way, in the decoding process of each video stream, the decoding device determines how much each video stream occupies the memory for prediction information, In other words, if information on how much the frame occupying the maximum memory of each video stream occupies and information on how much memory each frame of each video stream occupies is known in advance before decoding, It is sufficient to secure a memory in advance in that size, so that memory management becomes easy, and more moving images can be reproduced simultaneously with the same memory capacity.

  The present invention has been made for the above-mentioned circumstances, and an object of the present invention is to facilitate memory management of a memory for prediction information of a decoding device and to optimize the capacity with the same capacity. An object of the present invention is to provide an encoding device and a decoding device capable of simultaneously reproducing many moving images.

  In order to achieve the above object, the first encoding apparatus of the present invention inputs one piece of moving picture information composed of a plurality of temporally continuous frames or a plurality of pieces of moving picture information to be simultaneously processed. An encoding processing unit that performs predictive encoding processing and decoded image data generated by the encoding processing unit are input, and image data for prediction reference is compressed in a memory provided in the encoding device. A compression processing unit that performs the same compression processing as the predetermined compression processing at the time of storage, calculates and outputs a compression rate in units of frames, and outputs each compression frame to each frame that constitutes one moving image. And a compression rate update unit that obtains the worst compression rate from each compression rate, and outputs the worst compression rate together with the image data after compression encoding.

  In order to achieve the above object, the second encoding apparatus of the present invention performs prediction reference to perform interframe predictive encoding on moving image information composed of a plurality of temporally continuous frames. A memory for storing image data for use, a compression processing unit for performing a predetermined compression process on the image data in order to store the image data in the memory, and inputting the compressed image data from the memory And a decompression processing unit that performs decompression processing corresponding to the compression processing, and a predictive encoding process by inputting a single moving image or a plurality of moving images that are simultaneously processed in parallel, wherein the compression processing A compression rate updating unit that calculates and outputs a compression rate based on the predetermined compression process in units of the frame, and obtains the worst compression rate from the compression rates related to the frames constituting one moving image. Together with the image data after compression coding and summarized in that outputs the worst compression ratio.

  Here, it is preferable that the worst compression rate is stored in an option header in an output format in which encoded image data to be output is arranged in a predetermined manner.

  In order to achieve the above object, the third encoding device of the present invention inputs one piece of moving picture information composed of a plurality of temporally continuous frames or a plurality of pieces of moving picture information to be simultaneously processed. Then, the encoding processing unit that performs the predictive encoding process and the decoded image data generated by the encoding processing unit are input, and the image data for prediction reference is compressed in the memory provided in the encoding device A compression processing unit that performs the same compression processing as the predetermined compression processing when storing and stores and calculates and outputs the compression rate in units of frames, and forms one moving image together with the image data after compression encoding The gist is to output each compression rate related to each frame.

  In order to achieve the above object, the fourth encoding apparatus of the present invention performs prediction reference to perform interframe predictive encoding on moving image information composed of a plurality of temporally continuous frames. A memory for storing image data for use, a compression processing unit for performing a predetermined compression process on the image data in order to store the image data in the memory, and inputting the compressed image data from the memory And a decompression processing unit that performs decompression processing corresponding to the compression processing, and a predictive encoding process by inputting a single moving image or a plurality of moving images that are simultaneously processed in parallel, wherein the compression processing A compression rate based on the predetermined compression processing is calculated and output for each frame, and each compression rate related to each frame constituting one moving image is output together with the image data after compression encoding. And effect.

  Here, each compression rate is preferably stored in an option header for each frame in an output format in which output encoded image data is arranged in a predetermined manner.

  In any of the first to fourth encoding devices, the compression processing in the compression processing unit can be a lossless compression processing.

  In any of the first to fourth encoding devices, the compression processing in the compression processing unit can be irreversible compression processing.

  In order to achieve the above object, a first decoding device of the present invention inputs encoded image data output from the first or second encoding device, and performs prediction code in the encoding device. A decoding apparatus that performs a decoding process corresponding to the encoding process, the worst compression rate output from the encoding apparatus is input, from the compression processing unit corresponding to the compression process in the encoding apparatus, The gist of the present invention is to provide a memory management unit that performs memory management based on the worst compression rate when storing image data after compression processing in a memory corresponding to the memory in the encoding device. Here, for example, the memory management unit secures a storage area in the memory based on the worst compression rate.

  In order to achieve the above object, the second decoding apparatus of the present invention inputs the encoded image data output from the third or fourth encoding apparatus, and performs prediction code in the encoding apparatus. A decoding apparatus that performs a decoding process corresponding to the encoding process, wherein each compression rate relating to each frame constituting one moving image output from the encoding apparatus is input, and the compression process in the encoding apparatus A memory management unit that performs memory management based on each compression rate when storing the compressed image data in the memory corresponding to the memory in the encoding device from the compression processing unit corresponding to The gist. Here, for example, the memory management unit secures a storage area in the memory based on the compression ratios.

  In both the first and second decoding apparatuses, the compression processing in the compression processing unit can be a lossless compression process.

  In both the first and second decoding apparatuses, the compression processing in the compression processing unit can be irreversible compression processing.

  According to the encoding device and the decoding device of the present invention, the memory management of the prediction information memory of the decoding device is facilitated, and the optimization enables the reproduction of more moving images simultaneously with the same capacity. become.

It is a figure which shows the structure of an example of the encoding apparatus in 1st Embodiment. It is a figure which shows the structure of the other example of the encoding apparatus in 1st Embodiment. It is a figure which shows the structure of an example of the decoding apparatus in 1st Embodiment. It is a figure which shows the structure of an example of the encoding apparatus in 2nd Embodiment. It is a figure which shows the structure of the other example of the encoding apparatus in 2nd Embodiment. It is a figure which shows the detailed structure of the lossy compression process part 23 and the corresponding expansion | extension process part 24 in 2nd Embodiment. It is a figure which shows the structure of an example of the decoding apparatus in 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
1-3 is a figure for demonstrating 1st Embodiment of the encoding apparatus and decoding apparatus of this invention. The first embodiment is a case where reversible compression processing is employed when storing a picture in a memory (picture memory) for storing a picture (picture) for prediction.

  FIG. 1 is a diagram illustrating a configuration of an example of an encoding device according to the first embodiment. The encoding apparatus 1A shown in FIG. 1 includes a subtraction unit 11, a compression processing unit 12, a first variable length encoding unit 13, an expansion processing unit 14, an addition unit 15, a lossless compression processing unit 16, and a picture. A memory 17, a corresponding decompression processing unit 18, a motion compensation prediction unit 19, a compression rate update unit 20, a second variable length coding unit 21, and a multiplexing unit 22 are provided. Note that the encoding apparatus 1A shown in FIG. 1 inputs moving image information composed of a plurality of temporally continuous frames in units of blocks. H.264 (MPEG (Moving Picture Experts Group) -4 AVC).

  The subtraction unit 11 subtracts the picture information of the macroblock sent from the motion compensation prediction unit 19 from the encoding target macroblock of the picture as the encoding target frame, and sends it to the compression processing unit 12 as a residual prediction signal. Supply. Note that the encoding target macroblock related to the I picture in the case of MPEG is directly sent to the compression processing unit 12 without passing through the subtraction unit 11.

  The compression processing unit 12 performs irreversible compression processing on the residual prediction signal of the target macroblock sent from the subtraction unit 11. Here, as the irreversible compression processing, there is an algorithm that performs orthogonal transformation processing and quantization processing like JPEG (Joint Photographic Experts Group) in a still image. Note that orthogonal transform processing includes discrete cosine transform (DCT) and Hadamard transform.

  The first variable length coding unit 13 performs lossless compression on the compressed image data output from the compression processing unit 12 by variable length coding such as Huffman coding or arithmetic coding for each block.

  Further, the decompression processing unit 14 performs irreversible decompression processing corresponding to the irreversible compression processing in the compression processing unit 12 on the compressed image data in units of macroblocks output from the compression processing unit 12, and is obtained by decompression. The macroblock is sent to the adder 15. The adding unit 15 adds the information related to the macroblock output from the decompression processing unit 14 to the information related to the preceding most highly correlated macroblock output from the motion compensation prediction unit 61, thereby performing subsequent prediction. Restore the provided macroblock. As described above, the macroblock related to the I picture in the case of MPEG does not go through the adding unit 15.

  The reversible compression processing unit 16 performs a predetermined reversible compression process on the image information output from the addition unit 15 or not passed through the addition unit 15, and the obtained compressed image data is compared with the subsequent processing. Is stored in the picture memory 17. Note that the lossless compression processing algorithm at this time may be arbitrarily selected according to the characteristics of the image to be processed. For example, there are GIF (Graphics Interchange Format) and PNG (Portable Network Graphics).

  In addition, the lossless compression processing unit 16 calculates the compression rate CR by its own compression processing in units of frames and supplies it to the compression rate update unit 20. The compression rate updating unit 20 compares the input compression rate CR with the compression rate CR related to the previous frame. If the compression rate CR related to the current frame is lower, it is updated and stored. The compression rate updating unit 20 performs such processing over each frame constituting one moving image. Therefore, when the processing for one moving image is completed, the compression rate update unit 20 holds the compression rate related to the frame having the worst compression rate (hereinafter referred to as “worst compression rate WCR”). The compression rate update unit 20 outputs the worst compression rate WCR to the second variable length coding unit 21 in units of moving images. The second variable length coding unit 21 performs lossless compression on the worst compression rate WCR information output from the compression rate update unit 20 by variable length coding such as Huffman coding or arithmetic coding.

  On the other hand, the motion compensated prediction unit 19 sequentially inputs each macroblock constituting the picture as the encoding target frame, and the macro having the highest correlation from the macroblocks of the picture related to the prediction frame stored in the picture memory 17. Search for a block. The corresponding decompression processing unit 18 corresponding to the processing of the lossless compression processing unit 16 performs decompression processing corresponding to the lossless compression processing in the lossless compression processing unit 16 on the data related to the macroblock retrieved by the motion compensation prediction unit 19. The result is supplied to the motion compensation prediction unit 19. The motion compensation prediction unit 19 supplies the information related to the macroblock with the highest correlation obtained in this way to the subtraction unit 11 and the addition unit 15 as described above. Although not shown, the motion compensation prediction unit 19 outputs the amount of movement as a motion vector when there is a part that moves integrally as a certain fixed area between two macroblocks for comparison. . The output motion vector is similarly subjected to variable length coding and supplied to the multiplexing unit 22.

  The multiplexing unit 22 multiplexes the encoded image data from the first variable length encoding unit 13, the information on the worst compression rate WCR from the second variable length encoding unit 21, and other information such as a motion vector. Output. At this time, there are several possible methods for outputting the worst compression rate WCR information together with the encoded image data. It can be incorporated in an optional header portion such as SEI (Supplemental Enhancement Information) of a file format such as MP4 that can store code data based on the H.264 standard. Of course, it can also be output as an independent file separate from the image data file.

  According to the encoding apparatus shown in FIG. 1, the worst compression rate for each of the designed moving pictures in the apparatus for storing image data by compressing the picture memory 17 for prediction by a predetermined lossless compression method. Can be supplied to the decoding device side. Each moving image is designed so that it can be stored in its picture memory through a decoding process in a decoding device to be described later. However, as will be described later, there is information on how bad each image occupies the picture memory. It is effective if it is known in advance. It is assumed that the decoding device has the same processing units as the lossless compression processing unit 16 and the corresponding expansion processing unit 18 in the encoding device 1A.

  FIG. 2 is a diagram illustrating a configuration of another example of the encoding device according to the first embodiment. Only parts different from the example shown in FIG. 1 will be described. In the encoding apparatus 1B shown in the figure, all the information on the compression rate of each frame of each moving image is supplied to the decoding apparatus side. That is, the compression rate update unit 20 is not provided, and all the compression rate information relating to each frame output from the lossless compression processing unit 16 is supplied to the second variable length coding unit 21. In this example, the multiplexing unit 22 may store the compression rate information for each frame in the option header for each frame of the file format of the encoded image data. Of course, it can be output as a separate file.

  Next, the decoding device side will be described. FIG. 3 is a diagram illustrating a configuration of an example of a decoding device according to the first embodiment. The decoding apparatus 3A shown in the figure includes a separation unit 31, a first variable length decoding unit 32, an expansion processing unit 33, an addition unit 34, a lossless compression processing unit 35, and a picture memory 36. An expansion processing unit 37, a motion compensation prediction unit 38, a second variable length decoding unit 39, and a memory management unit 40 are provided.

  The separation unit 31 separates the encoded data that is sent into encoded image data, encoded information related to the compression rate, a motion vector, and the like. The first variable length decoding unit 32 to which the encoded image data is input is a variable length decoding unit corresponding to the variable length encoding process by the first variable length encoding unit 13 shown in FIGS. Process. Thus, for example, Huffman decoding or arithmetic decoding. Similarly, the second variable length decoding unit 39 reproduces the worst compression rate WCR or each compression rate CR by performing variable length decoding processing on the encoded information related to the compression rate. Also, a motion vector (not shown) is subjected to variable length decoding processing and supplied to the motion compensation prediction unit 38.

  The decompression processing unit 33 that has received the image data from the first variable length decoding unit 32 is an irreversible compression process corresponding to the irreversible compression processing in the compression processing unit 12 of the encoding devices 1A and 1B shown in FIGS. Perform decompression processing. The residual prediction signal obtained by such processing is sent to the addition unit 34 and the motion compensation prediction unit 38.

  The motion compensation prediction unit 38 processes the macroblock data of the preceding image data stored in the picture memory 36 using the residual prediction signal from the decompression processing unit 33 and the motion vector, and sends the processed data to the addition unit 34. . The adding unit 34 adds the residual prediction signal from the decompression processing unit 33 and the macroblock data from the motion compensation prediction unit 38, and outputs decoded image data in macroblock units.

  The image information output from the adder 34 is subjected to a reversible compression process by a reversible compression processor 35 having the same configuration as the reversible compression processor 16 shown in FIGS. Thus, the obtained compressed image data is stored in the picture memory 36 for comparison with subsequent processing. On the other hand, the memory management unit 40 provided for managing the storage of information in the picture memory 36 is based on the worst compression rate WCR or each compression rate CR input from the second variable length decoding unit 39, and the lossless compression processing unit The storage of the compressed image data obtained by 35 in the picture memory 36 is controlled. Specifically, a continuous area is secured in advance in the picture memory 36 based on the worst compression rate WCR or each compression rate CR. As a result, the memory management of the picture memory 36 is facilitated, and the optimization makes it possible to simultaneously reproduce more moving images with the same capacity.

  The motion compensation prediction unit 38 sequentially inputs each macro block obtained by the expansion processing by the expansion processing unit 33, and the macro block having the highest correlation from the macro blocks of the picture related to the prediction frame stored in the picture memory 36. Search for. The corresponding decompression processing unit 37 having the same configuration as the corresponding decompression processing unit 18 shown in FIGS. 1 and 2 performs lossless compression in the lossless compression processing unit 35 on the data related to the macroblock retrieved by the motion compensation prediction unit 38. The decompression process corresponding to the process is performed, and the result is supplied to the motion compensation prediction unit 19.

  In FIGS. 1 and 2, the compression rate is obtained in the process of predictive coding processing for the image data in the coding devices 1 </ b> A and 1 </ b> B. As another example, the coding device is a conventional one. In other words, the compression rate update unit 20 is not provided, the lossless compression processing unit does not output the compression rate CR, and dedicated software or device provided at the subsequent stage of the encoding device is used as the encoding device. Based on the encoded image data output from the (processing unit), the degree to which each frame is compressed by the lossless compression processing unit 16 in the encoding devices 1A and 1B is determined, and the worst compression rate WCR or each compression is obtained. The rate CR may be supplied to the decoding device 3A side.

  Specifically, the encoded image data generated by an encoding device (processing unit) having a lossless compression processing unit that does not include the compression rate update unit 20 and does not output the compression rate CR is input, and the encoding is performed. A compression processing unit that performs the same compression processing as the predetermined compression processing when compressing and storing predictive reference image data in the picture memory 17 provided in the apparatus, and calculates and outputs a compression rate in units of frames And a compression rate update unit for obtaining the worst compression rate from each compression rate related to each frame constituting one moving image, which is output from the compression processing unit, and the worst image together with the image data after compression encoding What is necessary is just to output a compression rate. Alternatively, the compression rate update unit is not provided, and each compression rate relating to each frame constituting one moving image may be output together with the image data after compression encoding.

Second Embodiment
4-7 is a figure for demonstrating 2nd Embodiment of the encoding apparatus and decoding apparatus of this invention. In the first embodiment, reversible compression processing is adopted as a compression method for storing in a picture memory, but in this second embodiment, lossy compression processing is adopted. When lossy compression is used in this way, there is a drawback that when the prediction is performed cumulatively between frames, the distortion of the image also increases accordingly. Since the compression rate is higher than when adopting the method, the capacity of the picture memory can be used more efficiently than the lossless compression. Furthermore, when the lossy compression method is adopted as the compression method, the compression parameter (quantization coefficient) can be changed for each frame. In this case, information on the worst compression rate or each compression rate is obtained. Sending it would be meaningless. Therefore, here, it is assumed that a constant image quality is maintained over one moving image, and the compression parameter is constant over one moving image. As a result, even in this case, based on the capacity of each moving image processed in parallel, the lossy compression technique to be employed, the capacity of the picture memory, etc. Each video needs to be designed.

  FIG. 4 is a diagram illustrating a configuration of an example of the encoding device according to the second embodiment, and corresponds to the encoding device according to the first embodiment illustrated in FIG. 1. The same parts as those in FIG. Therefore, in the encoding device 1C illustrated in FIG. 4, instead of the lossless compression processing unit 16 and the corresponding expansion processing unit 18 in the encoding device 1A illustrated in FIG. 1, the lossy compression processing unit 23 and the corresponding expansion processing unit 24 is provided.

  FIGS. 6A and 6B are diagrams illustrating detailed configurations of the lossy compression processing unit 23 and the corresponding decompression processing unit 24, respectively. The irreversible compression processing unit 23 shown in FIG. 5A is an orthogonal transformation unit 231 that performs a predetermined orthogonal transformation process on the image data input from the addition unit 15, and for the data after the orthogonal transformation, A quantization unit 232 that selects an appropriate quantization coefficient from the quantization table 234 and performs quantization processing, and performs variable length coding processing such as Huffman coding and arithmetic coding on the quantized data. And a variable length coding unit 233.

  Also, the corresponding decompression processing unit 24 shown in FIG. 5B performs variable length decoding corresponding to variable length coding in the variable length coding unit 233 on the compressed image data read from the picture memory 17. Supports variable length decoding unit 241 that performs processing, inverse quantization unit 242 that performs inverse quantization processing corresponding to quantization in quantization unit 232 based on quantization table 244, and orthogonal transform in orthogonal transform unit 231 And an inverse orthogonal transform unit 243 that performs the inverse orthogonal transform process.

  FIG. 5 is a diagram illustrating a configuration of another example of the encoding device according to the second embodiment, and is a device corresponding to the encoding device according to the first embodiment illustrated in FIG. 2. The same parts as those in FIG. Therefore, in the encoding device 1D illustrated in FIG. 5, instead of the lossless compression processing unit 16 and the corresponding expansion processing unit 18 in the encoding device 1B illustrated in FIG. 2, the lossy compression processing unit 23 and the corresponding expansion processing unit 24 is provided.

  FIG. 7 is a diagram illustrating a configuration of an example of a decoding device according to the second embodiment, and corresponds to the decoding device according to the first embodiment illustrated in FIG. 3. The same parts as those in FIG. Therefore, in the decoding device 3B shown in FIG. 7, an irreversible compression processing unit 41 and a corresponding expansion processing unit are used instead of the lossless compression processing unit 35 and the corresponding expansion processing unit 37 in the decoding device 3A shown in FIG. 42 is provided.

  As described above, also in the second embodiment that employs lossy compression processing as a compression method for storing in the picture memory, the same effects as in the first embodiment can be obtained.

  INDUSTRIAL APPLICABILITY The encoding device and decoding device of the present invention can be used for processing moving images displayed on a gaming machine such as a pachinko machine or a game machine.

1A, 1B, 1C, 1D Encoder 11 Subtraction unit 12 Compression processing unit 13 First variable length coding unit 14 Decompression processing unit 15 Addition unit 16 Lossless compression processing unit 17 Picture memory 18 Corresponding expansion processing unit 19 Motion compensation prediction unit 20 compression rate update unit 21 second variable length coding unit 22 multiplexing unit 23 lossy compression processing unit 24 corresponding expansion processing unit 3A, 3B decoding device 31 separation unit 32 first variable length decoding unit 33 expansion processing unit 34 Adder 35 Lossless compression processing unit 36 Picture memory 37 Corresponding decompression processing unit 38 Motion compensation prediction unit 39 Second variable length decoding unit 40 Memory management unit 41 Lossy compression processing unit 42 Corresponding decompression processing unit

Claims (14)

An encoding processing unit for performing predictive encoding processing by inputting one of moving image information composed of a plurality of temporally continuous frames or a plurality of moving image information to be simultaneously processed;
The same compression as the predetermined compression process when the decoded image data generated by the encoding processing unit is input and the image data for prediction reference is compressed and stored in the memory provided in the encoding device A compression processing unit that performs processing and calculates and outputs a compression rate in units of frames;
A compression rate update unit for obtaining the worst compression rate from each compression rate related to each frame constituting one moving image output from the compression processing unit;
And an output device that outputs the worst compression rate together with the image data after compression encoding. A memory for storing image data for prediction reference in order to perform predictive encoding between frames for moving image information composed of a plurality of temporally continuous frames;
A compression processing unit that performs a predetermined compression process on the image data in order to store the image data in the memory;
A decompression processing unit that inputs compressed image data from the memory and performs decompression processing corresponding to the compression processing;
An encoding device that performs predictive encoding processing by inputting one moving image or a plurality of moving images that are processed in parallel,
In the compression processing unit, a compression rate update unit that calculates and outputs a compression rate based on the predetermined compression processing in units of the frame and obtains the worst compression rate from the compression rates related to each frame constituting one moving image. And an output device that outputs the worst compression rate together with the compressed and encoded image data.   The encoding apparatus according to claim 1 or 2, wherein the worst compression rate is stored in an option header in an output format in which encoded image data to be output is arranged in a predetermined manner. An encoding processing unit for performing predictive encoding processing by inputting one of moving image information composed of a plurality of temporally continuous frames or a plurality of moving image information to be simultaneously processed;
The same compression as the predetermined compression process when the decoded image data generated by the encoding processing unit is input and the image data for prediction reference is compressed and stored in the memory provided in the encoding device A compression processing unit that performs processing and calculates and outputs a compression rate in units of frames;
And a compression apparatus for outputting each compression rate relating to each frame constituting one moving image together with the image data after compression encoding. A memory for storing image data for prediction reference in order to perform predictive encoding between frames for moving image information composed of a plurality of temporally continuous frames;
A compression processing unit that performs a predetermined compression process on the image data in order to store the image data in the memory;
A decompression processing unit that inputs compressed image data from the memory and performs decompression processing corresponding to the compression processing;
An encoding device that performs predictive encoding processing by inputting one moving image or a plurality of moving images that are processed in parallel,
In the compression processing unit, a compression rate based on the predetermined compression processing is calculated and output for each frame, and each compression rate relating to each frame constituting one moving image is output together with the image data after compression encoding. An encoding apparatus characterized by that.   6. The encoding apparatus according to claim 4, wherein each compression rate is stored in an option header for each frame in an output format in which encoded image data to be output is arranged in a predetermined manner.   The encoding apparatus according to claim 1, wherein the compression processing in the compression processing unit is a reversible compression process.     The encoding apparatus according to claim 1, wherein the compression processing in the compression processing unit is an irreversible compression process. A decoding device that inputs encoded image data output from the encoding device according to claim 1 or 2 and performs a decoding process corresponding to a predictive encoding process in the encoding device,
The worst compression rate output from the encoding device is input, and an image after compression processing is input from a compression processing unit corresponding to the compression processing in the encoding device to a memory corresponding to the memory in the encoding device. A decoding apparatus comprising: a memory management unit that performs memory management based on the worst compression ratio when storing data.   The decoding device according to claim 9, wherein the memory management unit reserves a storage area in the memory based on the worst compression rate. A decoding device that inputs encoded image data output from the encoding device according to claim 4 or 5 and performs a decoding process corresponding to a predictive encoding process in the encoding device,
Input each compression rate related to each frame constituting one moving image output from the encoding device, and correspond to the memory in the encoding device from the compression processing unit corresponding to the compression processing in the encoding device A decoding device, comprising: a memory management unit that performs memory management based on each compression rate when storing image data after compression processing in the memory.   The decoding device according to claim 11, wherein the memory management unit reserves a storage area in the memory based on the compression ratios.   The decoding device according to any one of claims 9 to 12, wherein the compression processing in the compression processing unit is a lossless compression processing. The decoding device according to any one of claims 9 to 12, wherein the compression processing in the compression processing unit is an irreversible compression processing.

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