发明名称 |
Methods and apparatus for statistical multiplexing during dual pass encoding |
摘要 |
Methods and apparatus for statistical multiplexing in a dual pass encoding scheme are provided. A first pass encoder encodes alternate slices of anchor frames as I-slices and P-slices respectively in order to generate statistics for both I and P frame encoding for the same anchor frame. A second pass encoder determines the encoding complexity estimates for a plurality of frames in a look-ahead pipeline and sums the encoding complexity estimates of selective frames in the look-ahead pipeline to determine the initial need parameter for a current frame to be encoded. The second pass encoder computes a need parameter for encoding the current frame based on the initial need parameter. The need parameter is used by a statmux processor to determine the encoding bit rate for second pass encoding of the current frame.
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申请公布号 |
US7251275(B2) |
申请公布日期 |
2007.07.31 |
申请号 |
US20020183197 |
申请日期 |
2002.06.25 |
申请人 |
GENERAL INSTRUMENT CORPORATION |
发明人 |
WU SIU-WAI;LIU VINCENT;HE YONG |
分类号 |
H04N7/12;H04B1/66;H04J3/04;H04N7/24;H04N7/26;H04N7/50;H04N7/58 |
主分类号 |
H04N7/12 |
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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