Moving image coding device, moving image decoding device, moving image coding/decoding system, moving image coding method and moving image decoding method

Abstract

A frequency transformation determination unit determines whether a plurality of adjacent transformation target regions with the partition boundary interposed therebetween are integrated or not. A transformation coefficient generation unit generates, by applying one frequency transformation, a transformation coefficient for the transformation target regions where the frequency transformation determination unit determined to integrate.

1 - 40 . (canceled) 
     
     
         41 . A moving image coding device comprising:
 an image input unit which divides a frame of an input moving image into units of macro blocks;   a partition structure determination unit which further divides the macro block into partitions;   a frequency transformation region division unit which divides the macro block into transformation target regions, at least one transformation target region including regions across the partitions;   a transformation coefficient generation unit which applies a frequency transformation to each of the transformation target regions divided by the frequency transformation region division unit to generate a transformation coefficient; and   a coded data output unit which outputs coded data obtained by losslessly coding the transformation coefficient.   
     
     
         42 . The moving image coding device according to  claim 41 , comprising:
 a local decoded image storage unit which stores a local decoded image that is a decoded image of the macro block for which the transformation coefficient has been generated;   a predicted image generation unit which selects a reference image for each partition from among the local decoded images stored in the local decoded image storage unit and generates a predicted image based on the selected reference image; and   a prediction residual generation unit which generates a prediction residual that is a difference between pixel values of the predicted image and the macro block.   
     
     
         43 . The moving image coding device according to  claim 42 , wherein:
 the frequency transformation region division unit divides the macro block into transformation target regions according to the frequency transformation applied to each partition, and sets a region obtained by integrating the transformation target regions that are adjacent to each other and included in the different partitions as one of the transformation target regions across the partitions when it is determined that a spatial correlation between the prediction residuals in the integrated region is high.   
     
     
         44 . The moving image coding device according to  claim 43 , wherein the frequency transformation region division unit generates transformation integration information indicating a transformation target region across the partitions, and
 the coded data output unit contains the transformation integration information in the coded data and then outputs the transformation integration information.   
     
     
         45 . The moving image coding device according to  claim 43 , wherein:
 the frequency transformation region division unit generates integrated transformation selection information indicating a configuration of transformation target regions in the macro block and a frequency transformation applied to each transformation target region, and   the coded data output unit contains the integrated transformation selection information in the coded data and then outputs the integrated transformation selection information.   
     
     
         46 . The moving image coding device according to  claim 42 , wherein:
 the frequency transformation region division unit selects a division pattern applied to the macro block from a set of division patterns to divide the macro block into regions to which frequency transformations are applied, any of the regions to which the frequency transformations are applied including division patterns across the partitions, to thereby divide the macro block into regions including the regions across the partitions.   
     
     
         47 . The moving image coding device according to  claim 46 , wherein:
 the coded data output unit contains information indicating the division pattern selected by the frequency transformation region division unit in the coded data and then outputs the information.   
     
     
         48 . A moving image decoding device comprising:
 a lossless code decoding unit which performs lossless code decoding and division into the macro blocks on coded data obtained by coding a moving image;   a local decoded image generation unit which applies, to each of transformation target regions into which the macro block has been divided, at least one of the transformation target regions including a transformation target region across partitions, an inverse frequency transformation according to the transformation target region to generate a local decoded image; and   a moving image output unit which combines the local decoded images to generate a moving image and outputs the moving image.   
     
     
         49 . The moving image decoding device according to  claim 48 , comprising:
 a local decoded image storage unit which stores a local decoded image that is an image obtained by decoding the coded data in units of macro blocks;   a predicted image generation unit which selects a reference image from among the local decoded images stored in the local decoded image storage unit for each of partitions into which the macro block has been further divided, and generates a predicted image based on the selected reference image; and   a prediction residual rebuilding unit which applies, to each transformation target region, an inverse frequency transformation according to the transformation target region to generate a prediction residual,   wherein the local decoded image generation unit sums the predicted image and the prediction residual for each pixel to generate the local decoded image.   
     
     
         50 . The moving image decoding device according to  claim 49 , wherein:
 transformation integration information indicating transformation target regions across the partitions is contained in the coded data,   the moving image decoding device further comprises a transformation target region determination unit which determines the transformation target regions based on the transformation integration information, and   the prediction residual rebuilding unit applies an inverse frequency transformation to each transformation target region determined by the transformation target region determination unit to generate the prediction residual.   
     
     
         51 . The moving image decoding device according to  claim 49 , further comprising:
 a transformation target region determination unit which determines transformation target regions across the partitions based on an index indicating a spatial correlation between the regions,   wherein the prediction residual rebuilding unit applies an inverse frequency transformation to each transformation target region determined by the transformation target region determination unit to generate the prediction residual.   
     
     
         52 . The moving image decoding device according to  claim 49 , wherein:
 integrated transformation selection information indicating a configuration in the macro block of transformation target regions to which a moving image coding device having generated coded data has applied the frequency transformation is contained in the coded data, and   the prediction residual rebuilding unit applies an inverse frequency transformation to each transformation target region indicated by the integrated transformation selection information to generate the prediction residual.   
     
     
         53 . The moving image decoding device according to  claim 49 , wherein:
 the prediction residual rebuilding unit selects a division pattern applied to the macro block from a set of division patterns to divide the macro block into regions to which frequency transformations are applied, any of the regions to which the frequency transformations are applied including division patterns across the partitions, based on the same criterion as a moving image coding device having generated the coded data, and applies an inverse frequency transformation to the macro block based on the selected division pattern.   
     
     
         54 . The moving image decoding device according to  claim 53 , wherein:
 information indicating a division pattern applied to the macro block by the moving image coding device having generated the coded data is contained in the coded data, and   the prediction residual rebuilding unit sets the division pattern indicated by the information contained in the coded data as the division pattern to be applied to the macro block that is the processing target.   
     
     
         55 . The moving image decoding device according to  claim 53 , wherein:
 the predicted image rebuilding unit selects the division pattern to be applied to the macro block from the set of division patterns based on the configuration of the partitions in the macro block and the macro block.   
     
     
         56 . A moving image coding/decoding system comprising a moving image coding device which receives an input of a moving image and outputs coded data, and a moving image decoding device which decodes the coded data output by the moving image coding device to generate a moving image, wherein:
 the moving image coding device comprises:   an image input unit which divides a frame of the input moving image into units of macro blocks;   a partition structure determination unit which further divides the macro block into partitions;   a frequency transformation region division unit which divides the macro block into transformation target regions, at least one transformation target region including regions across the partitions;   a transformation coefficient generation unit which applies a frequency transformation to each of the transformation target regions divided by the frequency transformation region division unit to generate a transformation coefficient; and   a coded data output unit which outputs coded data obtained by losslessly coding the transformation coefficient, and   the moving image decoding device comprises:   a lossless code decoding unit which performs lossless code decoding and division into the macro blocks on the coded data;   a local decoded image generation unit which applies, to each of transformation target regions into which the macro block has been divided, at least one of the transformation target regions including a transformation target region across partitions, an inverse frequency transformation according to the transformation target region to generate a local decoded image; and   a moving image output unit which combines the local decoded images to generate a moving image and outputs the moving image.   
     
     
         57 . A moving image coding method comprising:
 dividing, by a moving image coding device, a frame of an input moving image into units of macro blocks;   further dividing, by the moving image coding device, the macro block into partitions;   dividing, by the moving image coding device, the macro block into transformation target regions, at least one transformation target region including regions across the partitions;   applying, by the moving image coding device, a frequency transformation to each of the transformation target regions divided in the frequency transformation region division to generate a transformation coefficient; and   outputting, by the moving image coding device, coded data obtained by losslessly coding the transformation coefficient.   
     
     
         58 . A moving image decoding method comprising:
 performing, by a moving image decoding device, lossless code decoding and division into the macro blocks on coded data obtained by coding a moving image;   applying, by the moving image decoding device, to each of transformation target regions into which the macro block has been divided, at least one of the transformation target regions including a transformation target region across a partition, an inverse frequency transformation according to the transformation target region to generate a local decoded image; and   combining, by the moving image decoding device, the local decoded images to generate a moving image and outputting the moving image.