发明名称 |
CONTEXT INITIALIZATION IN ENTROPY CODING |
摘要 |
A decoder for decoding a video from a data stream into which syntax elements are coded using binarizations of the syntax elements, comprises 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 |
CA2839569(A1) |
申请公布日期 |
2012.12.20 |
申请号 |
CA20122839569 |
申请日期 |
2012.06.18 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |
发明人 |
GEORGE, VALERI;BROSS, BENJAMIN;KIRCHHOFFER, HEINER;MARPE, DETLEV;NGUYEN, TUNG;PREISS, MATTHIAS;SIEKMANN, MISCHA;STEGEMANN, JAN;WIEGAND, THOMAS |
分类号 |
H04N19/91;H04N19/124;H04N19/61;H04N19/70 |
主分类号 |
H04N19/91 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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