IMAGE DECODER AND IMAGE CODER

摘要

PROBLEM TO BE SOLVED: To apply a high-speed decoding processing to a bit stream corresponding to objects such as images that are compression-coded by the MPEG 4 system and to minimize the cost of a hardware circuit conducting the decoding processing. SOLUTION: A decoding LSI in compliance with the MPEG 4 is provided with a supplement means that applies supplement processing to decoded texture data, an arithmetic decoding means that applies arithmetic decoding processing to coded shape data and a composition means that composites the texture data to generate composite image data. The supplement means, the arithmetic decoding means and the composition means are respectively composed of a hardware circuit (exclusive engine), an arithmetic decoding engine 12, a padding engine 13 and a composition engine 14.