| 摘要 |
The present invention relates to the audio-video recording of overhead projector based presentations. The apparatus (1) comprises an audio microphone (29), a logging means (8, 27) for logging when a presenter changes a viewable object such as an overhead transparency (6) on an overhead projector, and a recording apparatus (25), wherein: the microphone (29) generates an audio signal from the audio portion of the presentation; the logging means (8, 27) is activatable to generate a marker signal indicating the change of viewable object (6); and the recording apparatus (25) receives the audio signal from the microphone (29) and the marker signal from the logging means (8, 26) to record said signals as audio data and marker data so that audio data is correlated with the marker data.
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