Telecommunication system with burst and continuous audio signals
Patent 4780758 Issued on October 25, 1988. Estimated Expiration Date: 
February 24, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 24, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3746780 Data communication system Videotex system Video subsystem for a hybrid videotex facility Cable television system selectively distributing pre-recorded video and audio messages Patent #: 4734764 InventorsAssigneeApplicationNo. 07/153941 filed on 02/24/1988US Classes:725/144, Headend348/484, Sound signal725/114, Server or headend725/131, Receiver (e.g., set-top box)725/151, Receiver (e.g., set-top box)725/87Video-on-demandExaminersPrimary: George, Keith E.Attorney, Agent or FirmInternational ClassesH04N 7/088 (20060101)H04N 7/087 (20060101) H04N 7/084 (20060101) H04N 7/173 (20060101) H04N 1/00 (20060101) AbstractA telecommunication system for transmitting video and plural audio information on a transmission medium includes a facility and an addressable terminal. The facility includes arrangements for providing addressed video frames containing information corresponding to still images and for providing addressed audio frames containing information corresponding to audio bursts. There is also means for providing non-addressed signals containing information corresponding to at least one channel of continuous audio. The addressed video frames, addressed audio frames, and non-addressed signals are coupled to the transmission medium and sent to the terminal. The addressable terminal includes means for detecting said addressed video frames, addressed audio frames, and non-addressed signals on said transmission medium. Circuits select video frames and audio frames in response to their corresponding addresses. Arrangements are made for storing still images contained by selected video frames and for storing and playing audio bursts contained by selected audio frames. Circuits provide continuous audio signals contained by said non-addressed signals. A circuit attenuates the continuous audio signals in response to playing of an audio burst.Other References
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