Clock recovery apparatus as for a compressed video signal
Patent 5381181 Issued on January 10, 1995. Estimated Expiration Date: 
May 13, 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.
May 13, 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 ReferencesMoving picture signal transmission system Self-correcting synchronization signal method and apparatus Timing recovery for variable bit-rate video on asynchronous transfer mode (ATM) networks Patent #: 5287182 InventorAssigneeApplicationNo. 060923 filed on 05/13/1993US Classes:348/423.1, Arrangements for multiplexing one video signal, one or more audio signals, and a synchronizing signal348/461, NONPICTORIAL DATA PACKET IN TELEVISION FORMAT348/474, For controlling video processing (e.g., digitally assisted video)348/500SYNCHRONIZATIONExaminersPrimary: Britton, Howard W.Attorney, Agent or FirmInternational ClassH04N 007/13AbstractApparatus for developing synchronization of an intermediate layer of signal such as the transport or multiplex layer of a multi-layered compressed video signal, includes at the encoding end of the system a modulo K counter which is clocked responsive to a system clock, and the count valued is embedded in the signal at the transport layer according to a predetermined schedule. At the receiving end of the system a similar counter is responsive to a controlled receiver clock signal and the count value of this counter is sampled at the arrival of the count values embedded in the transport layer. The differences of successive sampled count values of the receiver counter are compared with the differences of corresponding successive values of the embedded count values in the transport layer to provide a signal to control the receiver clock signal.Other References
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