Image decoding device

Abstract

An image encoding device includes a first prediction parameter determination section (53) for selecting, for each of prediction units belonging to a first group, a prediction parameter from a basic set; a second prediction parameter determination section (55) for selecting, for each of prediction units belonging to a second group, a prediction parameter from a reduced set (i) including at least a part of the prediction parameter(s) selected by the first prediction parameter determination section (53) and (ii) is constituted by a prediction parameter(s), the number of which is not more than the number of prediction parameters included in the basic set; and a prediction parameter encoding section (243) for encoding (i) information indicating which one of prediction parameters is selected by the first prediction parameter determination section (53) and (ii) information indicating which one of prediction parameters is selected by the second prediction parameter determination section (55).

Description

[0001] This application is a divisional application of an invention patent application with an application date of December 27, 2010, an application number of 201080064667.8, and an invention title of "image coding device and image decoding device". technical field [0002] 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 [0003] 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. . [0004] In such an encoding method, an image (picture) constituting a moving image is divided into slices obtained by dividing the...

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Problems solved by technology

[0013] 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

[0014] 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 region, so there is a code amount of coded data. Such problems are augmented by predictive model information

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