Abstract: A video input device senses a visual portion of a presentation and produces video signal information corresponding to the visual portion. A user interface is provided for inputting presentation identification information relating to a presentation. The audio signal information, video signal information and presentation identification information are stored as a presentation set. The system further includes a presentation management portion in communication with the presentation capture portion. The presentation management portion includes a character recognition device for generating text character information from the presentation set video signal information and adding the text character information to the set. The presentation set is stored in a database that includes a database indexing system for generating an index of text character information from the presentation set, and a database search program for searching the index for selected information contained therein.

Abstract: A data processing system is described for providing digital video information on subscriber demand, for very large video data files. The system enables rapid response to the requests by network subscribers, independent of the number of video files offered for selection. The data processing system is coupled through a data switch to a subscriber communications network.