APPARATUS AND METHOD FOR ARITHMETIC ENCODING AND ARITHMETIC DECODING BASED CONTEXT

摘要

PURPOSE: The arithmetic coding device of the context base and method and arithmetic decoding apparatus and method reduce the need space of the memory by enhancing the coding efficiency. CONSTITUTION: The N- tuple context decision unit(1104) decides the context of the N- tuple encoded. The extrication code encoding part(1107) is proceed the coding based on the N- tuple context about the extrication code. The MSB context decision unit(1105) decides the upper bit context corresponding to the high class bit symbol comprising the N- tuple.