Picture coding method and picture decoding method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKiyofumi Abe, Shinya Kadono, Satoshi Kondo, Makoto Hagai
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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.
Claims9
1-33. (canceled)
A coding method for coding an image on a block basis, the method comprising:
- determining a predictive value for a total number of non-zero coefficients in a current block to be coded based on a total number of non-zero coefficients in a coded block located on a periphery of the current block, wherein each non-zero coefficient has a value other than “0”;
- selecting a variable length coding method based on the determined predictive value;
- and
- coding the total number of non-zero coefficients in the current block by using the selected variable length coding method.
A coding method for coding an image on a block basis, the method comprising:
- determining a predictive value for a total number of non-zero coefficients included in a current block to be coded based on a total number of non-zero coefficients included in a coded block located adjacent to the current block, wherein each non-zero coefficient is a transform coefficient having a level value other than “0”;
- selecting a variable length coding method based on the determined predictive value;
- and
- coding the total number of non-zero coefficients included in the current block by using the selected variable length coding method.
A coding method for coding an image on a block basis, the method comprising:
- determining a predictive value for a total number of non-zero coefficients included in a current block to be coded based on a total number of non-zero coefficients included in a coded block located adjacent to the current block, wherein each non-zero coefficient is a transform coefficient having a level value other than “0”;
- selecting a variable length code table based on the determined predictive value;
- and
- coding the total number of non-zero coefficients included in the current block by using the selected variable length code table.
Dependencies are inferred from the claim text.