发明名称 |
Video transcoder with spatial resolution reduction and drift compensation |
摘要 |
A method and system reduces the spatial resolution of a compressed bitstream of a sequence of frames of a video signal by first decoding the frames, and storing the decoded frames in a first frame buffer. While performing the decoding, motion compensating is performed with full resolution motion vectors of the stored decoded frames. The decoded frames are then down-sampled to a reduced resolution, and stored in a second frame buffer. The reduced resolution frames are partially encoded to produce a reduced resolution compressed bitstream of the video. While performing the partial encoding, motion compensation is performed with reduced resolution motion vectors of the stored reduced resolution frames.
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申请公布号 |
US2002181579(A1) |
申请公布日期 |
2002.12.05 |
申请号 |
US20020046366 |
申请日期 |
2002.01.14 |
申请人 |
VETRO ANTHONY;SUN HUIFANG;YIN PENG;LIU BEDE |
发明人 |
VETRO ANTHONY;SUN HUIFANG;YIN PENG;LIU BEDE |
分类号 |
H04N7/30;G06T3/40;G06T9/00;H03M7/30;H03M7/36;H04N7/26;H04N7/32;(IPC1-7):H04B1/66 |
主分类号 |
H04N7/30 |
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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