DIGITAL SIGNAL CODING/DECODING APPARATUS

摘要

Digital decoding for receiving and decoding a
compression-coded digital signal in predetermined
transmission units comprises initializing an arithmetic
decoding 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 and information of initializing a register value
which shows the arithmetic decoding process. A context
model to be used for each type of decoded data is
determined. A binarization rule defined based on the
type of decoded data is generated. A probability of
occurrence generation unit for providing a probability of
occurrence corresponding to the context model determined
by the binarization rule is provided. Arithmetic
decoding is done based on the generated probability of
occurrence and the initialized register value.