| 摘要 |
<p>An apparatus for detecting scene changes (as distinct from shot cuts or edit points) in audio/video signals is disclosed, together with video recording and logging apparatus employing such detection. The means for detecting scene changes comprises a filtering arrangement (20) which receives and filters the audio soundtrack accompanying the video signal to periodically determine a background audio signal level. By comparison (24) of current and previously determined (22) background levels, a scene change (SC) is flagged when the current background audio level differs from a previous background level by more than a predetermined amount. A table of scene change locations may then be built up and stored with the video and audio data.</p> |
