Decoding device and coding device

Abstract

Provided is a moving image decoding device (1) which is structured so as to be equipped with an interim estimated prediction mode derivation unit (124) for transforming a prediction mode for each adjacent partition to an interim prediction mode contained in an interim prediction set which is a union of prediction sets (PS), and an estimated prediction mode derivation unit (125) for deriving an estimated prediction mode by estimating a prediction mode for each partition to be processed on the basis of the interim prediction mode for each adjacent partition obtained by the transformation.

Description

technical field [0001] The present invention relates to an encoding device for encoding images and a decoding device for decoding encoded images. Background technique [0002] In order to efficiently transmit or record moving images, a moving image encoding device that generates encoded data by encoding a moving image, and a moving image decoding device that generates a decoded image by decoding the encoded data are used. As a specific video encoding method, for example, H.264 / MPEG-4.AVC (Non-Patent Document 1) and VCEG (Video Coding Expert Group; Video Coding Expert Group) jointly developed encoder, that is, KTA Software The method used, etc. [0003] In such an encoding method, an image (picture) constituting a moving image consists of slices obtained by dividing the image, macroblocks obtained by dividing the slice, and macroblocks obtained by dividing the macroblock. The resulting block (block) is managed in a hierarchical structure and coded for each block. [0004] ...

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Problems solved by technology

[0038] Therefore, in Figure 24 When the shown prediction set PS400 is a prediction set of adjacent blocks, the prediction mode whose prediction direction is F1 (the prediction mode of the prediction mode IMP401 of the prediction set PS400 ) cannot be used when estimating the prediction mode. question

[0039] That is, in the technology of Non-Patent Document 2, there is a problem that the prediction mode derived as the estimated prediction mode is not limited to the above-mentioned representative prediction mode.

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