发明名称 |
ADAPTIVE COEFFICIENT SCANNING FOR VIDEO CODING |
摘要 |
This disclosure describes techniques for scanning coefficients of video blocks. In particular, the techniques of this disclosure adapt a scan order used to scan a two dimensional block of coefficients into a one dimensional coefficient vector based on statistics associated with one or more previously coded blocks. For example, statistics that indicate the likelihood that a given coefficient value in each position of a two dimensional block is zero or non zero may be collected for one or more previously coded blocks. At some point, an adjustment to the scan order can be made in order to better ensure that non-zero coefficients are grouped together near the front of the one dimensional coefficient vector, which can improve the effectiveness of entropy coding. The collection of statistics and adjustment of scan order may be made separately for each possible prediction mode. |
申请公布号 |
WO2008157431(A2) |
申请公布日期 |
2008.12.24 |
申请号 |
WO2008US67020 |
申请日期 |
2008.06.13 |
申请人 |
QUALCOMM INCORPORATED;YE, YAN;KARCZEWICZ, MARTA |
发明人 |
YE, YAN;KARCZEWICZ, MARTA |
分类号 |
H04N7/26;H04N7/30;H04N7/34;H04N7/36 |
主分类号 |
H04N7/26 |
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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