DIGITAL SIGNAL CODING METHOD AND APPARATUS, DIGITAL SIGNAL DECODING APPARATUS, DIGITAL SIGNAL ARITHMETIC CODING METHOD AND DIGITAL SIGNAL ARITHMETIC DECODING METHOD

摘要

A digital decoding apparatus for receiving and decoding a compression-coded digital signal in predetermined transmission units is disclosed. The decoding apparatus includes an initialization unit for initializing an entropy coding process based on information of initializing a table of probability of occurrence which is multiplexed on a header of data for the predetermined transmission units, a context model determination unit for determining a context model to be used for each type of decoded data among a plurality of context models, a probability of occurrence generation unit for providing a probability of occurrence corresponding to the context model, and an entropy decoding unit for entropy decoding based on the generated probability of occurrence. A digital signal coding apparatus for making a compression coding of a digital signal is also disclosed.