发明名称 |
Efficient shot change detection on compressed video data |
摘要 |
A mask matching approach to detect shot changes in MPEG coded video uses reference ratio variances of macroblocks between MPEG coded frames. A function is designed to quantize the results into shot change probability values. Moreover, a conversion function modifies this probability computation to minimize misdetection and loss of detection under unusual image pattern situations. A shot change probability threshold is defined for the video to be examined. When a frame's modified shot change probability exceeds this threshold, the frame is considered to contain a shot change. With this approach, processing time is reduced by evaluating MPEG coded data directly, rather than the raw video.
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申请公布号 |
US5900919(A) |
申请公布日期 |
1999.05.04 |
申请号 |
US19960758784 |
申请日期 |
1996.12.02 |
申请人 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE |
发明人 |
CHEN, SHU-CHIN SU;NI, CHENG-YAO;KUO, TONY C. T.;LIN, Y. B.;CHEN, ARBEE L. P. |
分类号 |
G06T9/00;H04N5/14;H04N7/36;(IPC1-7):H04N7/24 |
主分类号 |
G06T9/00 |
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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