Image encoding device, image decoding device, and data structure

Abstract

Disclosed is an image encoding device which includes; a first prediction parameter determination unit (53) which selects, from a basic set, prediction parameters for each prediction unit belonging to a first group; a second prediction parameter determination unit (55) which selects prediction parameters for each prediction unit belonging to a second group from a reduced set that comprises prediction parameters numbering fewer than the prediction parameters included in the basic set and that includes at least some of the prediction parameters selected by the first prediction parameter determination unit (53); and a prediction parameter encoding unit (243) which encodes whether the first prediction parameter determination unit (53) selected any prediction parameters and whether the second prediction parameter determination unit (55) selected any prediction parameters.

Description

technical field [0001] The present invention relates to an image encoding device that encodes an image to generate encoded data. Also, it relates to an image decoding device that decodes coded data generated using such an image coding device. Background technique [0002] In order to efficiently transmit or record moving pictures, moving picture encoding devices are used. As a specific video encoding method, for example, H.264 / MPEG-4AVC (Non-Patent Document 1) and the method adopted in KTA software, which is a codec jointly developed by VCEG (Video Coding Experts Group), etc., can be mentioned. . [0003] In such an encoding method, an image (picture) constituting a moving image is divided into slices obtained by dividing the image, macroblocks obtained by dividing the slice, and subblocks obtained by dividing the macroblock. Layer structure to manage, usually by encoding per sub-block. [0004] Also, in such an encoding method, generally, a predicted image is generated ...

AI Technical Summary

Problems solved by technology

[0012] However, in order to properly generate a predicted image in the moving picture decoding device, it is necessary to encode the prediction parameters used in the moving picture coding device and transmit them to the moving picture decoding device. growing problem

[0013] For example, in the above-mentioned conventional intra prediction, it is necessary to encode not only the above-mentioned difference data but also the prediction mode information indicating which prediction mode is selected for each prediction target area. Such problems are augmented by predictive model information

Images