decoding device, encoding device

Abstract

A video decoding device (1) is configured to include an intermediate estimation prediction mode derivation unit (124) that converts the prediction modes of each adjacent partition into the union of prediction sets (PS), that is, included in the intermediate prediction set. an intermediate prediction mode; and an estimated prediction mode derivation unit (125) that estimates the prediction mode in the target partition based on the intermediate prediction mode of each adjacent partition obtained by the above conversion, thereby deriving the estimated prediction mode.

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 moving image 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 adopted by KTA software way 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] Also,...

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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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