Image encoding device and method

Abstract

An image encoding device includes: a prediction processing unit (22) for performing prediction processing for m component values among N components constituting a quantized block; a first CBP judgment unit (23) for judging presence / absence of a non-zero component in (N-m) components among the N components in the first operation mode and judging presence / absence of a non-zero component in (N-n) components among the N components in the second operation mode; a CBP judgment unit (24) for judging presence / absence of a non-zero component for m components after the subjected to the prediction processing by the prediction processing unit (22) in the first operation mode and judging presence / absence of a non-zero component for n components in the second operation mode; and a CBP generation unit (25) for generating a CBP code indicating whether all the components of the block are zero or not according to the judgment result of the first and the second judgment units (23, 24).

Description

technical field [0001] The present invention relates to an image encoding device such as moving image encoding. Background technique [0002] Conventional moving picture coding methods include MPEG (Moving picture expert group) standards such as MPEG1, MPEG2, and MPEG4. These are the specifications set to be able to correspond to various image sizes and media. For example, MPEG1 / MPEG2 is used for media with a relatively large image size such as DVD, and MPEG4 is used for media with a relatively small image size such as mobile phones. [0003] In the video coding, a video is divided into a processing unit called a macro block (MB; Macro Block) and processed. The MB includes four luma component blocks and two color difference component blocks. The luminance component block includes four components, namely Y0, Y1, Y2, and Y3, and the color difference component block includes two components, namely C0 and C1. Each Y, C component block includes 8x8 pixel values ​​or component...

AI Technical Summary

Problems solved by technology

In the above-mentioned background, the problem arises as follows: If different image encoding devices are installed for each moving image encoding process with a different processing structure, it will greatly affect the increase in the area of ​​the semiconductor integrated circuit, and it will be difficult to achieve cost reduction. This semiconductor integrated circuit is a device that includes an image encoding device and is capable of realizing moving image encoding processing.

Also, in the case of MPEG4, since DC / AC prediction processing is performed, the processing time is increased compared to MPEG1 / MPEG2 which does not perform DC / AC prediction processing

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