Method and apparatus for entropy encoding/decoding
AssigneeSamsung Electronics Co., Ltd.
InventorsAlexander Alshin, Elena Alshina
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Abstract
Provided are methods and apparatuses for entropy-encoding and entropy-decoding an image. The method for entropy-encoding an image includes operations of arithmetically encoding a binary value of a current coding symbol, by using a probability of a predefined binary value which is determined based on previously-coded symbols that are encoded before the current coding symbol; and updating the probability of the predefined binary value by using a plurality of scaling factors, according to the binary value of the current coding symbol.
Claims15
A method of entropy-encoding an image, the method comprising:
- arithmetically encoding a binary value of a current coding symbol, by using a probability of a predefined binary value which is determined based on previously-coded symbols that are encoded before the current coding symbol;
- and
- updating the probability of the predefined binary value by using a plurality of scaling factors, according to the binary value of the current coding symbol.
An entropy encoding apparatus for entropy-encoding an image, the entropy encoding apparatus comprising:
- a binary arithmetic coder for arithmetically encoding a binary value of a current coding symbol, by using a probability of a predefined binary value which is determined based on previously-coded symbols that are encoded before the current coding symbol;
- and
- a context modeler for updating the probability of the predefined binary value by using a plurality of scaling factors, according to the binary value of the current coding to symbol.
A method of entropy-decoding an image, the method comprising:
- arithmetically decoding a binary value of a current coding symbol, by using a probability of a predefined binary value which is determined based on previously-coded symbols that are decoded before the current coding symbol;
- and
- updating the probability of the predefined binary value by using a plurality of scaling factors, according to the binary value of the current coding symbol.
An entropy decoding apparatus for entropy-decoding an image, the entropy decoding apparatus comprising:
- a binary arithmetic decoder for arithmetically decoding a binary value of a current coding symbol, by using a probability of a predefined binary value which is determined based on previously-coded symbols that are decoded before the current coding symbol;
- and
- a context modeler for updating the probability of the predefined binary value by using a plurality of scaling factors, according to the binary value of the current coding symbol.
Dependencies are inferred from the claim text.