Rate limited control mechanism for MPEG PCR dejittering

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels

Reexamination Certificate

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Reexamination Certificate

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10829568

ABSTRACT:
A system and method for guaranteeing an upper bound on output jitter while maintaining maximum loop bandwidth. At least a portion of a plurality of transport packets stored in a buffer include a first timestamp value. A first phase locked loop receives a stream of first timestamp values and generates a variable rate timing signal stream that conveys a variation rate and a phase accumulation rate of the stream of first timestamp values to the first loop. A second phase locked loop receives the variable rate timing signal stream and generates a stable rate timing signal stream conveying the average rate of the variable rate timing signal stream. A interval timer is responsive to the stable rate timing signal stream in order to release the transport packets from the buffer.

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Scientific-Atlanta, Inc. Pending Patent Application, U.S. Appl. No. 10/797,227, filed Mar. 10, 2004, entitled “Transport Stream Dejitterer,” Inventors: William D. Woodward, Jr. and Howard G. Pinder.
Jittering Smoothing and Traffic Modeling for MPEG-2 Video Transport over ATM Networks Claims 1-20 vol. 9. No. 5 pp. 332-339, 1998—Wenwu, Zhu, Yao Wang, Ya-Qin Zhang International Journal of Imaging Systems and Technology.
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Dejittering in the Transport of MPEG-2 and MPEG-4 Video—Claims 1-20 vol. 8, No. 3—p. 233, 235, Oct. 23, 2000—Mulit Media System Springer-Verlag Germany.

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