DIGITAL SIGNAL CODING/DECODING APPARATUS

摘要

A digital signal coding apparatus and method for making a compression coding of a digital signal, comprises coding the digital signal by determining a context model to be used for each type of coding data among a plurality of context models in a coding unit. When the digital signal is divided for each predetermined unit to be coded, the information representing an initial state of probability of occurrence of the context of model corresponding to the type of the coding data and information of initializing a register value which shows an arithmetic decoding process with a bit stream as part of the coded data of the predetermined unit is multiplexed into a bit stream.