Digital signal coding method and apparatus, digital signal decoding apparatus, digital signal arithmetic coding method and digital signal arithmetic decoding method
A digital decoding apparatus and method for receiving and decoding a compression-coded digital signal in predetermined transmission units is disclosed. The decoding apparatus includes initialization unit for initializing an arithmetic 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 and information of initializing a register value which shows the arithmetic decoding process, 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 binarization unit for generating a binarization rule defined based on the type of decoded data, a probability of occurrence generation unit for providing a probability of occurrence corresponding to the context model determined by the binarization rule, and an arithmetic decoding unit for arithmetic decoding based on the generated probability of occurrence and the initialized register value.
1. A digital decoding apparatus for receiving and decoding a compression-coded digital signal in predetermined transmission units, comprising:
initialization unit for 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 said predetermined transmission units and information of initializing a register value which shows the arithmetic decoding process;
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 binarization unit for generating a binarization rule defined based on the type of decoded data;
a probability of occurrence generation unit for providing a probability of occurrence corresponding to the context model determined by the binarization rule; and
an arithmetic decoding unit for arithmetic decoding based on said generated probability of occurrence and said initialized register value.
2. A digital decoding method for receiving and decoding a compression-coded digital signal in predetermined transmission units, comprising:
initialization step for 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 said predetermined transmission units and information of initializing a register value which shows the arithmetic decoding process;
a context model determination step for determining a context model to be used for each type of decoded data among a plurality of context models;
a binarization step for generating a binarization rule defined based on the type of decoded data;
a probability of occurrence generation step for providing a probability of occurrence corresponding to the context model determined by the binarization rule; and
an arithmetic decoding step for arithmetic decoding based on said generated probability of occurrence and said initialized register value.
3. A digital decoding apparatus for receiving and decoding a compression-coded digital signal in predetermined transmission units, comprising:
initialization unit for 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 said predetermined transmission units and information of initializing a register value which shows the arithmetic decoding process;
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, which the context model is mutually determined by a context model used by an arithmetic coding process;
a binarization unit for generating a binarization rule defined based on the type of decoded data;
a probability of occurrence generation unit for providing a probability of occurrence corresponding to the context model determined by the binarization rule; and
an arithmetic decoding unit for arithmetic decoding based on said generated probability of occurrence and said initialized register value.
4. A digital decoding method for receiving and decoding a compression-coded digital signal in predetermined transmission units, comprising:
initialization step for 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 said predetermined transmission units and information of initializing a register value which shows the arithmetic decoding process;
a context model determination step for determining a context model to be used for each type of decoded data among a plurality of context models, which the context model is mutually determined by a context model used by an arithmetic coding process;
a binarization step for generating a binarization rule defined based on the type of decoded data;
a probability of occurrence generation step for providing a probability of occurrence corresponding to the context model determined by the binarization rule; and
an arithmetic decoding step for arithmetic decoding based on said generated probability of occurrence and said initialized register value.