Muting apparatus for a compressed audio/video signal receiver
Patent 5467139 Issued on November 14, 1995. Estimated Expiration Date: 
May 17, 2014. 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.
May 17, 2014. 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 Re33535 Circuit for detecting the operational state of a television receiver Video signal decoder muting circuit and method of muting Patent #: 5381186 InventorAssigneeApplicationNo. 245113 filed on 05/17/1994US Classes:348/512, Locking of video or audio to reference timebase348/515, Audio to video375/240.01Television or motion video signalExaminersPrimary: Groody, James J.Assistant: Lee, Michael G. Attorney, Agent or FirmInternational ClassH04N 009/475AbstractA compressed audio/video, A/V, receiver provides A/V component timing reference signals (PTS's) coincident with reproduction of associated decompressed component signals. Synchronization apparatus generates a function of the difference of occurring component audio and video PTS's. This function, which is indicative of relative audio and video synchronization, is compared with a predetermined threshold value, and a mute control signal is generated when the threshold is exceeded. Muting circuitry, responsive to the control signal disables audio reproduction when the reproduced audio and video component signal timing deviate from mutual synchronization. | |
