Patent ID: 7355622

Claim:
A computer-implemented process for highlighting a current speaker in each frame of a low frame-rate video at a rate significantly faster than the video frame rate, comprising using a computer to perform the following process actions: obtaining audio and video of an event having multiple people in attendance; tracking the movements of the attendees and recording their positions when each frame of the video is obtained and their subsequent positions until the next video frame is obtained; periodically identifying which of the attendees is currently speaking at a rate significantly faster than the prescribed video frame rate; generating a data stream of video frames from the obtained video of the event comprising, keyframes generated at a prescribed frame rate, and delta frames, one or more of which are generated between the generation of each pair of consecutive keyframes, wherein each delta frame comprises just those changes needed to the last-generated keyframe as modified if all previously generated delta frames, if any, applicable to that keyframe were applied thereto, which highlight a region in that keyframe associated with the location of a current speaker as depicted in the last-generated keyframe in a way that visually distinguishes that attendee from all other currently non-speaking attendees also depicted in the last-generated keyframe; and generating an audio data stream from the obtained audio of the event.