发明名称 |
METHOD AND CLOSED-LOOP TRANSCODER FOR REDUCED SPATIAL RESOLUTION TRANSCODING OF COMPRESSED BITSTREAM OF SEQUENCE OF FRAMES OF VIDEO SIGNAL |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and closed-loop transcoder for reducing 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. <P>SOLUTION: While performing decoding, motion compensating is performed with full resolution motion vectors of the stored decoded frames. The decoded frames are then down-sampled to 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. <P>COPYRIGHT: (C)2003,JPO |
申请公布号 |
JP2003219430(A) |
申请公布日期 |
2003.07.31 |
申请号 |
JP20020381469 |
申请日期 |
2002.12.27 |
申请人 |
MITSUBISHI ELECTRIC RESEARCH LABORATORIES INC |
发明人 |
ANTHONY VETRO;SUN HUIFANG;YIN PENG;LIU BEDE |
分类号 |
H04N19/147;H03M7/30;H03M7/36;H03M7/40;H04N19/19;H04N19/30;H04N19/40;H04N19/423;H04N19/48;H04N19/50;H04N19/513;H04N19/59;H04N19/61;H04N19/625;H04N19/91 |
主分类号 |
H04N19/147 |
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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