Clock recovery using a direct smoothing process

Details Clock recovery using a direct smoothing process Clock recovery using a direct smoothing process

2006-10-31

2006-10-31

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S326000, C713S400000

Reexamination Certificate

active

07130368

ABSTRACT:
A system and method for synchronizing a local clock to a reference clock using a linear model of the error between the local clock and the reference clock is disclosed. In one embodiment, a direct smoothing process is used in conjunction with the linear model to estimate a frequency offset by which the frequency of an oscillator of the local clock is adjusted. Also disclosed herein is a phased-lock loop (PLL) adapted to synchronize a local clock with a reference clock using the direct smoothing process, as well as a system implementing the PLL for timing the playout of data received from a transmitter.

REFERENCES:
patent: 6208643 (2001-03-01), Dieterich et al.
patent: 6449291 (2002-09-01), Burns et al.
patent: 6650719 (2003-11-01), Baker
patent: 6744764 (2004-06-01), Bigdeliazari et al.
patent: 6744782 (2004-06-01), Itakura et al.
patent: 6834057 (2004-12-01), Rabenko et al.
patent: 7020791 (2006-03-01), Aweya et al.
patent: 2002/0044620 (2002-04-01), Spijker et al.
patent: 2002/0141451 (2002-10-01), Gates et al.
Receiver buffer control for variable bit-rate real-time video; Lau, R.C. et al; Communications, 1992. ICC 92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications. IEEE International Conference on; Jun. 14-18, 1992 pp. 544-550 vol. 1.
On source timing recovery for circuit emulation in ATM networks Vakil, F.; Global Telecommunications Conference, 1989, and Exhibition. ‘Communications Technology for the 1990s and Beyond’. GLOBECOM '89., IEEE; Nov. 27-30, 1989 pp. 1820-1827 vol. 3.
ATM circuit emulation-a comparison of recent techniques; Ahmed, K.M.; Hluchyj, M.G.; Global Telecommunications Conference, 1991. GLOBECOM '91. Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services; Dec. 2-5, 1991 pp. 370-374 vol. 1.
Efficient linear-quadratic filtering; Yi-Chyun Tseng; Linebarger, D.A.; Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on [see also Circuits and Systems II: Express Briefs, IEEE Transactions on] vol. 43, Issue 5. May 1996 pp. 397-400.
R. Noro et al, “Circuit Emulation over IP Networks”, IFIP 6thInter. Workshop on Protocols for High-Speed Networks, Salem—MA, USA, Aug. 1999, pp. 187-201.
ATM Forum af-vtoa-0078.000, “Circuit Emulation Service Interoperability Specification Version 2.0”, Jan. 1997.
R. C. Lau et al., “Synchronous Techniques for Timing Recovery in BISDN”, Proc. IEEE Globecom, 1992, pp. 814-820.
G. F. Andreotti et al., “Clock Recovery and Reconstruction of PAL Pictures for MPEG Coded Streams Transported Over ATM Networks”, IEEE Trans. Circuits and Systems for Video Technology, vol. 5, No. 6, Dec. 1995, pp. 508-514.

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