Coding method, decoding method, and equipments for transform coefficients

摘要

Disclosed in the present invention are a coding method, decoding method and equipments for transform coefficients. The coding method, for example, comprises the following steps: coding transform coefficients of a transform coefficients block according to a preset scanning sequence, and coding setting number of transform coefficients in each group, until coding the last group of the transform coefficients block; storing the acquired non-zero transform coefficients distribution, absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients; when the last group is coded, coding the stored non-zero transform coefficients distribution and the non-zero transform coefficients distribution of the last group coding into a code stream after the non-zero transform coefficients distribution of the last group coding is acquired, and coding the stored absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients together with the absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients of the last group coding into a code stream after the absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients of the last group are acquired. It can improve the efficiency of coding and decoding.