JP2010034802A - Moving image encoding device and method of controlling the same - Google Patents

Abstract

The present invention relates to an H.264 standard that can be mounted on a semiconductor integrated circuit by improving encoding processing speed, suppressing deterioration in image quality due to encoding, and mounting on a semiconductor integrated circuit. H.264 compliant video encoding apparatus is provided.
An image of one frame is divided into slices composed of a plurality of macroblocks, and each of the small blocks obtained by dividing the macroblock is divided into H.264 and H.264. H.264 intra prediction encoding is performed. At this time, by controlling the pipeline processing for each slice, the processing speed can be increased without increasing the circuit scale and without causing deterioration in image quality.
[Selection] Figure 4

Description

  The present invention relates to a moving image encoding apparatus and a control method thereof, The present invention relates to a moving picture coding apparatus that performs moving picture coding conforming to the H.264 standard and a control method thereof.

  Due to dramatic progress in digital signal processing technology in recent years, recording of moving images to a storage medium and transmission of moving images via a transmission path, which have been difficult in the past, are performed. In this case, a compression-encoding process is performed on each picture constituting the moving image, so that a code stream with a significantly reduced data amount is created. As such a moving image compression encoding method, H.264 is used. The standard of H.264 has been standardized.

  H. In addition to the H.264-compliant predictive encoding circuit, in general, when a moving image encoding apparatus is applied to a signal having a large amount of information such as an HDTV signal in high-detail television, a very high-speed operation is required. In response to such a request, a video encoding apparatus having the following configuration has been proposed.

  Hereinafter, the block configuration of the encoding process in the conventional moving image encoding apparatus is shown in FIG. 6 and described as the first conventional technique. As shown in the figure, the conventional moving image encoding apparatus includes an image dividing unit 301, N encoding units 300-1 to 300N, and buffers 306-1 to 306 corresponding to the N encoding units, respectively. -N and an output selection unit 305.

  The image dividing unit 301 divides an image corresponding to one frame of the input moving image into slices with a predetermined shape, and a unit of a macroblock configured by a rectangular area of 16 pixels in the horizontal direction and 16 pixels in the vertical direction. The macroblock of each slice is output simultaneously. The encoding units 300-1 to 300-N are assigned corresponding to the slices divided by the image dividing unit 301, and the image dividing unit 301 corresponds to each of the encoding units 300-1 to 300-N. , An image in units of macroblocks belonging to N slices is output.

  Each of the encoding units 300-1 to 300-N starts encoding when an image in units of macroblocks is input, and generates and outputs a code stream. Code streams in units of N macroblocks output from the encoding units 300-1 to 300-N are stored and held in the buffers 306-1 to 306-N, respectively. The output selection unit 305 outputs the code streams read from the N buffers 306-1 to 306-N in an arbitrary order.

  As described above, according to the first prior art, the processing speed can be increased N times by dividing an encoding target image into N slices and performing parallel encoding with N encoding units. It is. However, the circuit scale of the encoding unit is accordingly increased by N times, and the ratio occupied by the encoding unit in one semiconductor integrated circuit becomes very high. In view of such a problem, there is a method of reducing the signal processing speed in order to mount a moving image encoding device in a smaller range in a semiconductor integrated circuit of a restricted size. Hereinafter, this method will be described in detail as the second prior art.

  First, as shown in FIG. 7, when the color component of the input picture is composed of RGB, it is color-converted to YCbCr composed of luminance and color difference. The color difference samples are subjected to 4: 2: 0 or 4: 2: 2 sampling to thin out the number of data, thereby reducing the total number of data. FIG. 7 shows an example of sampling at 4: 2: 2. In this case, since the number of data after sampling is 0.5 times that of the input picture, encoding can be realized at half the processing speed of RGB data before conversion.

  This encoding method can also be applied to still images. For example, when coding an image composed of cyan, magenta, yellow, and blocks (CMYK), the C and M images are sampled, and the total number of data is 0.65 times the input picture. It is possible to

As described above, according to the second prior art, the circuit scale of the encoding unit is reduced by sampling the input image and reducing the number of data to be encoded, and the proportion occupied on the semiconductor integrated circuit is reduced. Can be suppressed. Therefore, it is possible to reduce the price of the semiconductor integrated circuit, and to implement it in consideration of economy and encoding processing speed.
Japanese Patent Laid-Open No. 06-253289

  In the conventional moving picture coding apparatus, when the coding circuit according to the first prior art described above is used, although the processing speed is improved, the circuit scale is large, so that the mounting cost to the semiconductor integrated circuit is high. , Processing performance and price cannot be balanced.

  Further, when the encoding circuit according to the second prior art described above is used, the input image is sampled according to the processing speed of the mountable encoding unit, and the total number of data to be encoded is reduced. Therefore, it is possible to implement the encoding unit in consideration of the price. However, since the data is uniformly sampled regardless of the quality and state of the data included in the image, an image photographed at a high resolution is deteriorated by encoding.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a moving picture coding apparatus and its control method that realize the following functions. That is, by performing the moving image encoding by pipeline processing, it is possible to improve the encoding speed while suppressing deterioration in image quality due to encoding without increasing the circuit scale.

  As a means for achieving the above object, a moving picture encoding apparatus of the present invention comprises the following arrangement.

  That is, a moving picture coding apparatus that performs intra prediction coding processing in units of frames of a moving picture and outputs a code stream, divides an image of one frame into slices composed of a plurality of macroblocks, The macroblock is divided into small blocks, and the image dividing means for outputting the block image in units of small blocks by time division, one for each slice, and the block image output from the image dividing means correspond to each other. Predictive coding means for creating a coding coefficient by performing predictive coding based on an image of a coded adjacent block adjacent to the block image in the slice, and a coding coefficient created by the predictive coding means To generate a reconstructed image referred to as an image of the adjacent block in the predictive encoding means Image generating means; and variable length encoding means for performing variable length encoding for each slice on the coding coefficient generated by the predictive encoding means and outputting a code stream, and the image segmentation The means outputs the block image to the predictive coding means after the reconstructed image to be referred to in the predictive coding of the block image to be output is created by the reconstructed image creating means. The predictive coding unit and the reconstructed image creating unit respectively create the coding coefficient and the reconstructed image by pipeline processing for each slice.

  According to the present invention having the above-described configuration, it is possible to improve the encoding speed while suppressing deterioration in image quality without increasing the circuit scale by performing moving image encoding by pipeline processing.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. The configurations shown in the following embodiments are merely examples, and the present invention is not limited to the illustrated configurations.

  <First Embodiment>

● H. H.264 Overview In the present embodiment, H.264. 1 shows a moving picture coding apparatus compliant with the H.264 standard. In order to clarify the characteristic configuration in the present embodiment, first, a general H.264 standard. An overview of the encoding process in the H.264 compliant predictive encoding circuit will be described.

  H. In H.264, an image of one frame of a moving image is divided into slices of a predetermined shape, and for each slice, a macroblock composed of a rectangular area of 16 pixels in the horizontal direction and 16 pixels in the vertical direction is used as a coding unit. Encoding is performed. As this predictive coding method, two prediction methods of intra prediction and inter prediction are used.

  In the intra prediction method, the luminance sample calculates a prediction value and a prediction residual in units of a minimum block or macroblock obtained by dividing a macroblock into 4 pixels × 4 pixels. The color difference sample calculates a prediction residual in units of subblocks obtained by dividing a macroblock into 8 pixels × 8 pixels.

  Here, the processing order when predictive coding of luminance samples is set to the minimum block unit will be described. As shown in FIG. 8, a macro block of 16 pixels × 16 pixels is composed of 16 minimum blocks of 4 pixels × 4 pixels. In the macroblock shown in FIG. 8, if the vertical and horizontal coordinates with the minimum block as a unit are x and y, respectively, intra prediction is executed in the order indicated by the arrows in the figure. That is, (0,0) → (1,0) → (0,1) → (1,1) → (2,0) → (3,0) → (2,1) → (3,1) → (0,2) → (1,2) → (0,3) → (1,3) → (2,2) → (3,2) → (2,3) → (3,3) Become.

  Also, in intra prediction, the prediction value for each minimum block is calculated by referring to the reconstructed data of the encoded minimum block (adjacent block) adjacent to the left, top, top left, and top right of the minimum block. The Therefore, the intra prediction of the minimum block unit is started after the reconstructed image of the minimum block unit adjacent to the left, upper, upper left, and upper right in the same slice is constructed. Therefore, the general H.P. In the H.264 compliant predictive encoding circuit, processing data is waited until a reconstructed image in units of adjacent minimum blocks is constructed, so that an empty slot is generated.

  Here H. In the H.264 standard, there is no interdependency between slices, and each is encoded independently. Also, code streams of different slices may not be linked to one bit stream. In the present embodiment, such an H.264. Based on the H.264 standard, empty slots generated in the encoding process are effectively used. In other words, during the period from when the pixel of the minimum block unit (4 × 4) of a slice is predictively encoded to construct a reconstructed image, the encoding of the minimum encoding unit of another slice is performed using a processing circuit that is an empty slot. To generate a multi-stream.

System configuration of the present embodiment The present embodiment is an H.264 format that outputs a code stream by performing intra prediction encoding processing in units of frames of moving images. In the moving picture encoding apparatus compliant with the H.264 standard, the processing speed is improved without increasing the circuit scale.

  FIG. 1 shows an example of a basic block configuration of a moving image encoding apparatus according to this embodiment. In the figure, 101 is an image dividing unit, 102 is a predictive coding unit, 103-1 and 103-2 are variable length coding units, 104 is an input selection unit, and 105 is an output selection unit.

  The image dividing unit 101 divides an input moving image of one frame into slices, and sequentially outputs them in units of a minimum block composed of a rectangular area of 4 pixels × 4 pixels.

  Here, an image dividing method in the image dividing unit 101 will be described with reference to FIG. FIG. 2 shows an example of division in an image of 32 pixels × 32 pixels for ease of explanation.

  First, an image is divided into slices with a predetermined shape. Here, the slice must be a set of macroblocks composed of a rectangular area of 16 pixels × 16 pixels.

  In FIG. 2, in order to simplify the description, an image of one frame is divided into two slices (slice 0, slice 1) of 32 pixels × 16 pixels, and each slice is composed of two macro blocks. Indicates. The macroblock of each slice is divided into 16 rectangular areas each consisting of 4 pixels × 4 pixels, and this rectangular area is the minimum block to be encoded in the predictive encoding unit 102.

  The image dividing unit 101 outputs block data alternately from each slice by time division in units of the above-described minimum block. Here, when the minimum block unit in FIG. 2 is expressed by coordinates (S, X, Y) (S: slice number, X: vertical direction, Y: horizontal direction), the image dividing unit 101 displays an image of the minimum block unit. Each slice is output alternately in the following order. That is, (0,0,0) → (1,0,0) → (0,1,0) → (1,1,0) → (0,0,1) → (1,0,1) → (0,1,1) → (1,1,1) → (0,2,0) → (1,2,0). . . , In that order. The processing order in the minimum block unit for each slice is shown in FIG.

  The image of the minimum block unit output from the image dividing unit 101 is input to the predictive encoding unit 102.

  The prediction encoding unit 102 includes an intra prediction unit 1021, an inter prediction unit 1022, an integer conversion unit 1025, a quantization unit 1026, a deblocking filter 1031, and the like.

  In the predictive coding unit 102, the image in the minimum block unit from the image dividing unit 101 is input to the intra prediction unit 1021, the inter prediction unit 1022, and the prediction residual calculation unit 1024.

  The intra prediction unit 1021 calculates a prediction value for the input minimum block image by referring to reconstruction data of an adjacent block having the same size as that block in the corresponding slice. Here, as described above, the adjacent block in the slice is the encoded minimum block adjacent to the left, upper, upper left, and upper right of the minimum block.

  One of the intra prediction result in the intra prediction unit 1021 and the inter prediction result in the inter prediction unit 1022 is selected by the selector 1023 according to the attribute (macroblock type) of the macroblock to which the input image belongs. The selection result is input to the prediction residual calculation unit 1024, and a prediction residual that is a difference with respect to the input image is calculated. Then, the prediction residual is converted into an integer by the integer conversion unit 1025 and further quantized by the quantization unit 1026. The quantized coefficient obtained here is output as an encoded coefficient.

  The predictive encoding unit 102 also performs inverse quantization on the quantization coefficient calculated by the quantization unit 1026 by the inverse quantization unit 1027, and the inverse integer transform unit 1028 performs inverse integer processing on the inverse quantization result. Perform local decoding by converting. Then, the reconstructed pixel calculation unit 1029 inputs the inverse integer conversion result (decode result) and the prediction image selected by the selector 1023, adds them to each other, and performs inverse intra prediction to calculate a reconstructed image. . This reconstructed image is stored in a frame buffer 1030 that functions as a frame holding unit. In the frame buffer 1030, reference image data for one frame is stored as reference image data of an adjacent block referred to in predictive coding.

  The reference image data for one frame held in the frame buffer 1030 is subjected to deblocking processing for removing noise near the block boundary in the deblocking filter 1031. The reference image data after the deblocking process is stored as a frame-by-frame reference image 106, and is referred to when inter prediction between a plurality of frames is performed in the inter prediction unit 1022.

  FIG. 4 shows the processing order (pipeline processing) in the minimum block unit in the predictive coding unit 102. According to the figure, for example, images (0, 0, 0) and (1, 0, 0) in the smallest block unit are sequentially input, and the quantized coefficients subjected to intra prediction, integer conversion, and quantization are locally decoded. Then, reconstructed images in units of minimum blocks are sequentially constructed. Then, the reconstruction of the reconstructed image of the minimum block image (0, 0, 0) is completed, and the reconstructed image of (1, 0, 0) is not reconstructed at the timing of (0, 0, 0). Processing of the minimum block image (0, 1, 0) using the reconstructed image as a reference image is started. That is, the image dividing unit 101 generates a reconstructed image to be referred to for predictive coding of the minimum block image to be output, and then outputs the minimum block image to the predictive coding unit 102. It will be. Further, according to FIG. 4, during the execution of the intra prediction process of the minimum block image (0, 1, 0), the inverse intra prediction process of the minimum block image (1, 0, 0) is also executed in parallel. I understand.

  As described above, the prediction encoding unit 102 realizes pipeline processing of processing for each slice by the configuration shown in FIG. 1 and realizes high-speed encoding.

  Note that the encoding processing speed in the predictive encoding unit 102 is the number of clock cycles required to locally decode the quantized coefficients that have been subjected to intra prediction, integer conversion, and quantization (see FIG. 4). (Corresponding to the period t). In other words, the maximum number of slices that can be processed in this embodiment is determined based on the number of clock cycles required from the input of the minimum block image to the construction of the reconstructed image.

  The quantization coefficient output from the prediction encoding unit 102 is output to the variable length encoding unit 103-1 or 103-2 via the input selection unit 104. In FIG. 1, in order to simplify the explanation, it is assumed that two slices are encoded, and therefore, an example in which two variable length encoding units are arranged in parallel is shown. Note that the number of variable length encoding units to be arranged in parallel is determined in advance by the number of slices in the frame image to be encoded.

  The variable length coding units 103-1 and 103-2 perform variable length coding on the input quantization coefficient of the minimum block unit by a CAVLC (Context Adaptive Variable Length Coding) method. The code stream generated by the encoding is stored and held in an internal buffer. Note that the variable length coding units 103-1 and 103-2 refer to a coding coefficient table (not shown) when performing variable length coding, but the table has no dependency between slices. It is not possible to refer to the same table. Therefore, the quantization coefficient of the minimum block unit is encoded by the variable length encoding unit corresponding to the slice to which the minimum block unit belongs.

  The input selection unit 104 determines whether the slice to which the quantization coefficient of the minimum block unit input from the prediction encoding unit 102 belongs belongs to slice 0 or slice 1 shown in FIG. If the coefficient belongs to slice 0, it is output to variable-length encoding section 103-1, and if it belongs to slice 1, it is output to variable-length encoding section 103-2. Note that the output relationship to the variable length coding unit by this slice may be reversed. That is, if the quantization coefficient of the minimum block unit belongs to slice 1, it may be outputted to variable length coding section 103-1, and if it belongs to slice 0, it may be outputted to variable length coding section 103-2. .

  Then, the output selection unit 105 reads the code stream of the minimum block unit in a desired slice by selecting the output of the variable length coding unit 103-1 or 103-2.

  As described above, according to the first embodiment, another slice is used by using a processing circuit that is an empty slot during the period from the prediction encoding of the pixel in the minimum block unit of a slice to the construction of a reconstructed image. The encoding of the minimum encoding unit is started. As a result, H.C. A multi-stream based on the H.264 standard is generated. Specifically, an H code in which processing speed is doubled by performing pipeline processing in one predictive encoding unit 102 and performing parallel processing in two variable length encoding units 103-1 and 103-2. . H.264 compliant video encoding apparatus is realized. Moreover, in the moving image encoding apparatus of this embodiment, since the sampling with respect to an encoding object image is not performed, the image quality degradation by encoding does not generate | occur | produce.

  According to such a moving image encoding apparatus, image quality degradation accompanying encoding is suppressed while satisfying an encoding processing speed required for general digital products. Further, since the circuit scale does not increase, mounting as a semiconductor integrated circuit is also worth the cost.

<Second Embodiment>
Hereinafter, a second embodiment according to the present invention will be described.

  FIG. 5 shows an example of a basic block configuration of a moving picture encoding apparatus according to the second embodiment. In the figure, the same reference numerals are assigned to the same components as those in FIG. 1 of the first embodiment described above, and the description thereof is omitted.

  As a characteristic configuration shown in FIG. 5, reference numeral 203 denotes a variable length encoding unit, 206-1 and 206-2 a buffer, 204 an input selection unit, and 205 an output selection unit.

  The minimum block unit quantization coefficient output from the predictive coding unit 102 is output to the buffer 206-1 or 206-2 via the input selection unit 204. In the second embodiment, the number of buffers that can be mounted in parallel is determined according to the number of slices into which one frame image is divided.

  The input selection unit 204 determines whether the slice to which the quantization coefficient of the minimum block unit input from the prediction encoding unit 102 belongs belongs to slice 0 or slice 1 shown in FIG. If the coefficient belongs to slice 0, it is output to buffer 206-1. If it belongs to slice 1, it is output to buffer 206-2. Note that the output relationship to the buffer by this slice may be reversed. That is, if the quantization coefficient of the minimum block unit belongs to slice 1, it may be output to buffer 206-1 and if it belongs to slice 0, it may be output to buffer 206-2.

  The buffers 206-1 and 206-2 store and hold the input quantization coefficient in units of the minimum block.

  Then, the output selection unit 205 selects the output of the buffer 206-1 or 206-2, reads out the quantization coefficient of the minimum block unit in the desired slice, and outputs it to the variable length coding unit 203.

  The variable length coding unit 203 performs variable length coding on the input quantization coefficient of the minimum block unit by the CAVLC method, and stores and holds the generated code stream in the internal buffer. Note that the variable length coding unit 203 refers to a coding coefficient table (not shown) when performing variable length coding, but the table refers to the same table because there is no dependency between slices. It is not possible. Therefore, in the second embodiment, a plurality of coding coefficient tables are prepared in advance, and when the quantization coefficient of the minimum block unit is variable-length encoded, by switching the table for each slice to which the minimum block belongs, Implement pipeline processing.

  As described above, according to the second embodiment, one predictive encoding unit 102 and one variable length encoding unit 203 perform pipeline processing, and two buffers 206-1 and 206-2 are arranged in parallel. Implement. As described above, in the second embodiment, the processing speed is doubled by a configuration different from that of the first embodiment described above. H.264 compliant video encoding apparatus is realized.

<Other embodiments>
The present invention can take the form of, for example, a system, apparatus, method, program, or storage medium (recording medium). Specifically, the present invention may be applied to a system composed of a plurality of devices (for example, a host computer, an interface device, a photographing device, a web application, etc.), or may be applied to a device composed of one device. good.

  The present invention also provides a software program that implements the functions of the above-described embodiments directly or remotely to a system or apparatus, and the system or apparatus computer reads out and executes the supplied program code. Achieved. The program in this case is a computer-readable program corresponding to the flowchart shown in the drawing in the embodiment.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention.

  In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, or the like.

  Recording media for supplying the program include the following media. For example, floppy disk, hard disk, optical disk, magneto-optical disk, MO, CD-ROM, CD-R, CD-RW, magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD- R).

  As a program supply method, the following method is also possible. That is, the browser of the client computer is connected to a homepage on the Internet, and the computer program itself (or a compressed file including an automatic installation function) of the present invention is downloaded to a recording medium such as a hard disk. It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention on a computer is also included in the present invention.

  In addition, the program of the present invention is encrypted, stored in a storage medium such as a CD-ROM, distributed to users, and key information for decryption is downloaded from a homepage via the Internet to users who have cleared predetermined conditions. It is also possible to make it. That is, the user can execute the encrypted program by using the key information and install it on the computer.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. Furthermore, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can also be realized by the processing.

  Further, the program read from the recording medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, and then executed, so that the program of the above-described embodiment can be obtained. Function is realized. That is, based on the instructions of the program, the CPU provided in the function expansion board or function expansion unit can perform part or all of the actual processing.

It is a block diagram which shows the structure of the moving image encoder in one Embodiment which concerns on this invention. It is a figure which shows the example of a division | segmentation of the image in this embodiment. It is a figure which shows the process order of the minimum block unit for every slice in this embodiment. It is a figure which shows the pipeline process in the prediction encoding part of this embodiment. It is a block diagram which shows the structure of the moving image encoder in 2nd Embodiment. It is a block diagram which shows the structure of the conventional moving image encoder. It is a figure which shows the example of the thinning-out of the data in the conventional moving image encoder. H. 2 is a diagram illustrating a processing order of a minimum block unit in H.264.

Claims (12)

A video encoding device that performs intra prediction encoding processing in units of frames of a video and outputs a code stream,
An image of one frame is divided into slices composed of a plurality of macro blocks, the macro block is further divided into small blocks, and the block images in units of small blocks are output in time division, one for each slice. Image segmentation means,
Predictive coding means for performing coding on the block image output from the image dividing means based on an image of a coded adjacent block adjacent to the block image in a corresponding slice to generate a coding coefficient When,
A reconstructed image creating means for decoding a coding coefficient created by the predictive coding means and creating a reconstructed image referred to as an image of the adjacent block in the predictive coding means;
Variable length coding means for performing variable length coding for each slice on the coding coefficient created by the predictive coding means and outputting a code stream;
The image dividing means, after the reconstructed image to be referred to at the time of predictive coding of the block image to be output is created by the reconstructed image creating means, the block image is subjected to the predictive coding Output to the means,
The moving picture coding apparatus, wherein the predictive coding unit and the reconstructed image creating unit respectively create the coding coefficient and the reconstructed image by pipeline processing for each slice. The variable length encoding means includes
A plurality of encoding means for performing variable length encoding with reference to the respective encoding coefficient table for each slice to which the encoding coefficient created by the predictive encoding means belongs,
The moving picture encoding apparatus according to claim 1, comprising: The variable length encoding means includes
A plurality of holding means for holding the coding coefficient output from the predictive coding means according to the slice to which the coding coefficient belongs;
A plurality of coding coefficient tables corresponding to each of the plurality of holding means;
Coding means for performing variable length coding on the coding coefficients held in each of the holding means with reference to a corresponding coding coefficient table;
The moving picture encoding apparatus according to claim 1, comprising:   The maximum number of slices for the one-frame image in the image dividing means is until the block image is input to the predictive encoding means and the reconstructed image of the block image is created in the reconstructed image creating means. 2. The moving picture coding apparatus according to claim 1, wherein the moving picture coding apparatus is determined on the basis of the number of clock cycles required. The predictive encoding means includes
Intra prediction means for performing predictive coding on the block image output from the image dividing means based on an image of an encoded adjacent block adjacent to the block image in a corresponding slice and outputting an intra prediction result; ,
Prediction residual calculation means for calculating a prediction residual which is a difference between the intra prediction result and the block image;
Integer conversion means for converting the calculated prediction residual into an integer;
Quantizing means for outputting a quantized coefficient obtained by quantizing the integer as the coded coefficient;
5. The moving picture encoding apparatus according to claim 1, comprising: The reconstructed image creating means includes:
Inverse quantization means for performing inverse quantization on the quantization coefficient output from the quantization means;
Inverse integer transform means for performing an inverse integer transform on the inverse quantization result;
Reconstructed image calculation means for calculating the reconstructed image by performing inverse intra prediction based on the inverse integer conversion result and the intra prediction result output from the intra prediction means;
Frame holding means for holding one frame of the calculated reconstructed image;
The moving picture coding apparatus according to claim 5, further comprising: The reconstructed image creating means further includes:
Deblocking means for performing deblocking processing to remove noise near a block boundary on the reconstructed image for one frame held in the frame holding means;
Reference image holding means for holding the reconstructed image for one frame after the deblocking process as a reference image to be referred to in inter prediction between a plurality of frames;
The moving picture coding apparatus according to claim 6, wherein:   The encoded adjacent block adjacent to the block image is an encoded block of the same size as the block adjacent to the left, upper, upper left, and upper right of the block image in the corresponding slice. The moving picture encoding apparatus according to any one of claims 1 to 7. The macroblock is a rectangular area of 16 pixels × 16 pixels,
9. The moving picture coding apparatus according to claim 1, wherein the small block is a rectangular area of 4 pixels × 4 pixels. A control method of a moving image encoding apparatus that performs intra prediction encoding processing in units of frames of a moving image and outputs a code stream,
An image of one frame is divided into slices composed of a plurality of macro blocks, the macro block is further divided into small blocks, and the block images in units of small blocks are output in time division, one for each slice. Image segmentation step,
Predictive coding step of performing prediction coding on the block image output in the image division step based on an image of an adjacent block that has been coded and is adjacent to the block image in a corresponding slice to generate a coding coefficient When,
Decoding the coding coefficient created in the predictive coding step, creating a reconstructed image that creates a reconstructed image referred to as the adjacent block in the predictive coding step;
A variable length coding step for performing variable length coding for each slice on the coding coefficient output in the predictive coding step and outputting a code stream;
In the image segmentation step, after the reconstructed image to be referred to at the time of predictive coding of the block image to be output is created in the reconstructed image creating step, the block image is output. ,
The predictive encoding step and the reconstructed image creating step each perform creation of the coding coefficient and the reconstructed image by pipeline processing for each slice. Control method.   A program for causing a computer to function as the moving image encoding apparatus according to any one of claims 1 to 9.   The computer-readable recording medium which recorded the program of Claim 11.

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