Digital video and audio file system
Television information system
Tamper-resistant, expandable communications system
Cable television system selectively distributing pre-recorded video and audio messages
Telecommunication system with burst and continuous audio signals
Digital interactive communication system
Presentation player Patent #: 4829372
ApplicationNo. 579238 filed on 09/04/1990
US Classes:725/93, Control process725/116, Control process725/122Return path via telephone network
ExaminersPrimary: Ng, Jin F.
Assistant: Woo, Stella
International ClassH04N 007/10
AbstractAn audio-video presentation display system based on manipulation of digitized information is disclosed for use in an interactive communications system wherein a subscriber may select for viewing on a television screen a plurality of audio-video presentations consisting of particular sequences of selected video frames and accompanying audio information. The audio-video presentation display system is responsive to commands from a host computer which designates and prepares the presentation for playback to the television of the subscriber who has requested it. The audio-video presentation display system includes a digital mass storage subsystem which provides for digital storage of compressed video and digitized audio information, and a plurality of digital audio-video display subsystems which include mechanisms for retrieving the selected digitized information from the storage subsystem, a subsystem for expanding and reformatting the data into a format suitable for television transmission, and another subsystem for controlling the transmission of the information to the subscriber who has requested it.