Device and method for image prediction encoding, device and method for image prediction decoding, and encoding/decoding system and method

Abstract

A picture prediction encoding device is provided, which includes: a region division unit for dividing an input picture into a plurality of blocks; a prediction signal generation unit for generating a prediction signal with respect to a pixel signal that is included in a subject block to be processed among the plurality of blocks; a residual signal generation unit for generating a residual signal between the pixel signal of the subject block and the generated prediction signal; a signal encoding unit for generating a compressed signal by encoding the residual signal; and a storage unit for decompressing the compressed signal and storing the decompressed signal as a reproduced pixel signal, wherein the prediction signal generation unit is configured to sub-divide the subject block into a plurality of small regions, at least one of the small regions is non-square, and a length of a first side of the non-square small region is longer than a length of a second side that is different from the first side.

Description

technical field [0001] The present invention relates to an image predictive encoding device, method and program, image predictive decoding device, method and program, and encoding / decoding system and method, and particularly relates to image predictive encoding / decoding with intra-frame prediction. Background technique [0002] In order to efficiently transmit and store still image data and moving image data, compression coding technology is used. In the case of moving images, MPEG1-4 or H.261-H.264 schemes are widely used. [0003] In these coding methods, coding / decoding processing is performed after dividing an image to be coded into a plurality of blocks. In MPEG4 or H.264, in order to further improve the encoding efficiency, in the predictive encoding within the picture, the adjacent reproduced image signal (the compressed image data after restoring the compressed image data) located in the same picture as the target block is used. Image signal) After generating the p...

AI Technical Summary

Problems solved by technology

In this case, for the upper pixel in the target block 1302 (for example, the pixel on the right side of the adjacent pixel I), the error is small even if it is approximated by the adjacent pixels A to D, but for the lower pixel in the target block 1302 Pixels (for example, pixels located on the right side of the adjacent pixel L) are far away from the adjacent pixels A~D, so when approximated by the adjacent pixels A~D, the error is large

As a result, the amount of encoding increases and the efficiency of compression decreases

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