Picture coding method and picture decoding method
AssigneePanasonic Corporation
InventorsKiyofumi Abe, Shinya Kadono, Satoshi Kondo, Makoto Hagai
Life of this patent
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Abstract
The method includes the following units: a coefficient number detecting unit (109) for detecting the number of coefficients which has a value other than 0 for each block according to the generated coefficient, a coefficient number storing unit (110) for storing the number of coefficients detected, a coefficient number coding unit (111) for selecting a table for variable length coding based on the numbers of coefficients in the coded blocks located on the periphery of a current block to be coded with reference to the selected table for variable length coding so as to perform variable length coding for the number of coefficients.
Claims3
A picture coding method for coding, on a block-to-block basis, an image by transforming the image into coefficients showing spatial frequency components, the method comprising:
- a predicting step for calculating a predictive value of the number of coefficients other than 0 contained in a current block to be coded based on the numbers of coefficients other than 0 contained in coded blocks located on a periphery of the current block;
- a table selecting step for selecting tables for variable length coding based on the predictive value calculated in the predicting step;
- and
- a variable length coding step for performing variable length coding for the number of coefficients other than 0 contained in the current block, with reference to the tables for variable length coding selected in the table selecting step.
3-33. (canceled)
Dependencies are inferred from the claim text.