发明名称 |
Context initialization in entropy coding |
摘要 |
A decoder includes an entropy decoder configured to derive a number of bins of the binarizations from the data stream using binary entropy decoding by selecting a context among different contexts and updating probability states associated with the different contexts, dependent on previously decoded portions of the data stream; a desymbolizer configured to debinarize the binarizations of the syntax elements to obtain integer values of the syntax elements; a reconstructor configured to reconstruct the video based on the integer values of the syntax elements using a quantization parameter, wherein the entropy decoder is configured to distinguish between 126 probability states and to initialize the probability states associated with the different contexts according to a linear equation of the quantization parameter, wherein the entropy decoder is configured to, for each of the different contexts, derive a slope and an offset of the linear equation from first and second four bit parts of a respective 8 bit initialization value. |
申请公布号 |
US9455744(B2) |
申请公布日期 |
2016.09.27 |
申请号 |
US201314108132 |
申请日期 |
2013.12.16 |
申请人 |
GE VIDEO COMPRESSION, LLC |
发明人 |
George Valeri;Bross Benjamin;Kirchhoffer Heiner;Marpe Detlev;Nguyen Tung;Preiss Matthias;Siekmann Mischa;Stegemann Jan;Wiegand Thomas |
分类号 |
H03M7/42;H04N19/52;H04N19/50;H04N19/70;H04N19/13;H04N19/61;H04N19/124 |
主分类号 |
H03M7/42 |
代理机构 |
Pillsbury Winthrop Shaw Pittman LLP |
代理人 |
Pillsbury Winthrop Shaw Pittman LLP |
主权项 |
1. Decoder for decoding a video from a data stream into which syntax elements are coded using binarizations of the syntax elements, comprising
an entropy decoder configured to derive a number of bins of the binarizations from the data stream using binary entropy decoding by selecting a context among different contexts and updating probability states associated with the different contexts, dependent on previously decoded portions of the data stream; a desymbolizer configured to debinarize the binarizations of the syntax elements to acquire integer values of the syntax elements; and a reconstructor configured to reconstruct the video based on the integer values of the syntax elements using a quantization parameter, wherein the entropy decoder is configured to distinguish between 126 probability states and to initialize the probability states associated with the different contexts according to a linear equation of the quantization parameter, wherein the entropy decoder is configured to, for each of the different contexts, derive a slope and an offset of the linear equation from first and second four bit parts of a respective 8 bit initialization value. |
地址 |
Albany NY US |