Audio-video recording of overhead projector based presentations

A method of making an audio-video recording of a projection enhanced presentation, using an apparatus comprising an audio microphone, a logging element for logging when a presenter changes a viewable object on an overhead projector, and a recording apparatus, wherein the method comprises the steps of:

• a) using the microphone to generate an audio signal from an audio portion of the presentation;
• b) changing a viewable object on a projection plate, and activating the logging element to generate a marker signal indicating the change of viewable object;
• and
• c) using the recording apparatus to record the audio signal from the microphone and the marker signal from the logging element as respectively audio data and marker data so that audio data is correlated with the marker data.

An apparatus for making an audio-video recording of a projection enhanced presentation, said apparatus comprising a video camera;

• an audio microphone, a logging element for logging when a presenter changes a viewable object on an overhead projector, and a recording apparatus, wherein:
• the video camera generates video data of the presentation;
• the audio microphone generates an audio signal from an audio portion of the presentation;
• the logging element is activatable to generate a marker signal indicating the change of the viewable object;
• and the recording apparatus receives the video data from the video camera and the audio signal from the microphone and the marker signal from the logging element to record said audio and marker signals as audio data and marker data so that audio data is correlated with the marker data and to combine said video data with said audio and marker data.