| 摘要 |
PURPOSE: A method for controlling the playback speed of a video is provided to automatically control the playback speed depending on the scene change distribution of a multi-media stream while indexing and editing the multi-media stream. CONSTITUTION: A scene change distribution detecting instrument(20) detects the scene change distribution in a multi-media stream from a video source(10) for measuring the scene change speed of the video stream. Herein, the scene change distribution is detected by using a key frame distribution, a scene boarder distribution, and an image difference distribution between frames for the multi-media stream. The scene change detected in the scene change distribution detecting instrument is outputted as a relative speed data according to the distribution of accumulative difference. A playback speed deciding instrument(30) receives the relative speed data for deciding a playback speed. Herein, the playback speed is slowed down in the dense portion of scene change distribution. On the contrary, the playback speed is sped up in the sparse portion of scene change distribution.
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