Synchronization of audio/video information
Patent 5396497 Issued on March 7, 1995. Estimated Expiration Date: 
March 16, 2013. 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.
March 16, 2013. 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 Method and apparatus for maintaining audio/ video synchronism in a television signal read-out from a digital buffer memory by a reference signal Information transmission system Synchronous residual time stamp for timing recovery in a broadband network Video coder/decoder with shift prevision for correctly decoded signal blocks Patent #: 5267036 InventorAssigneeApplicationNo. 032341 filed on 03/16/1993US Classes:375/240.25, Specific decompression process348/465, Data separation or detection370/506, Frame or bit stream justification375/362, Frequency or phase control using synchronizing signal375/376Phase locked loopExaminersPrimary: Olms, Douglas W.Assistant: Kizou, Hassan Attorney, Agent or FirmInternational ClassesH04J 003/06H04N 005/04 Foreign Application Priority Data1993-02-26 JPAbstractA compressed video signal and a compressed audio signal decoding apparatus which including a local access unit counter intended for digital AV applications where access unit headers (e.g. frame headers, audio unit headers or other kind of data unit headers) may be lost or generated by storage media or transmission errors. In order to prevent a resulting AV sync error a value called "access unit count" is included in each elementary stream. With this value each decoder can detect lost or false access unit headers, and correct the AV synchronization. In order to support editing, an extra bit can be added to indicate discontinuity in the access unit count.Field of SearchData separation or detection | |
