Intra prediction apparatus

Abstract

The present invention provides an intra prediction apparatus that helps to improve picture quality and coding efficiency and can reduce computational load. The intra prediction means (11) includes a candidate defining unit (111) for defining, from among a plurality of intra prediction directions, candidates for intra prediction directions applicable to a plurality of pixel blocks constituting the image data by adapting to characteristics of the image data, and using the An intra-prediction execution unit (112) that performs intra-prediction according to the intra-prediction direction defined by the candidate definition unit (111). As a result, the computational load can be reduced while contributing to the improvement of picture quality and coding efficiency.

Description

technical field [0001] The present invention relates to an internal prediction device that can be used for animation compression, etc., and also relates to a technology for reducing the calculation amount of internal prediction as an animation compression method. Background technique [0002] In recent years, with the popularization of communication infrastructure such as broadband and the decline in the prices of large-capacity storage devices such as personal computers, HDDs, and DVDs, memory cards, etc., the environment where ordinary consumers edit, store, transmit, and carry images Already available, more and more users. [0003] In this way, on the one hand, the scenes of image processing by ordinary consumers are increasing, but on the other hand, even if the performance of personal computers is continuously improved, better performance in image processing cannot be obtained. For example, if the amount of image information is very large, it takes a lot of time to com...

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Problems solved by technology

In addition, the present inventors have also noticed that if intra-prediction is performed without checking image characteristics, there is a problem of performing unnecessary processing such as prediction direction processing that does not contribute to coding efficiency.

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