Method and apparatus for entropy-coding/entropy-decoding video data using different binarization methods

摘要

Provided are a method and apparatus for entropy-encoding/entropy-decoding video data. The method of entropy-encoding video data includes binarizing coefficients of the frequency domain, which are generated by transforming a residual block of a current block into the frequency domain, using different binarization methods and performing binary arithmetic coding on the binarized coefficients. In this way, the coefficients are binarized adaptively according to whether the frequencies of the coefficients are high or low, thereby improving the compression efficiency of the video data.

主权项

1. An apparatus for entropy-coding video data, the apparatus comprising:
a binarizer configured to binarize a coefficient of a frequency domain, which are generated by transforming a residual block of a current block into the frequency domain, using at least one from among truncated binarization method and Exponential Golomb binarization method; and an arithmetic coder configured to perform arithmetic coding on the binarized coefficient including a first bin string related to the truncated binarization method, wherein: when the coefficient is binarized using the truncated binarization method and the Exponential Golomb binarization method, the binarized coefficient further includes a second bin string related to a maximum code value of the truncated binarization method, the second bin string is related to the Exponential Golomb binarization method, and the maximum code value of the truncated binarization method varies according to a position of the coefficient in the residual block, when the coefficient is less than or equal to the maximum code value of the truncated binarization method, the binarized coefficient does not include the second bin string, and when the coefficient is greater than the maximum code value of the truncated binarization method, the binarized coefficient includes the first bin string and the second bin string.