Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2008-07-01
2008-07-01
Duong, Frank (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C704S241000
Reexamination Certificate
active
07394833
ABSTRACT:
A device is disclosed that makes packetized and encoded speech data audible to a listener, as is a method for operating the device. The device includes a unit for generating a synchronization request for reducing an amount of synchronization delay, and further includes a speech decoder that is responsive to the synchronization delay adjustment request for executing a time-warping operation for one of lengthening or shortening a duration of a speech frame. In one embodiment the speech decoder comprises a code excited linear prediction (CELP) speech decoder, and the CELP decoder time-warping operation is applied to a reconstructed excitation signal u(k) to derive a time-warped reconstructed signal uw(k). The time-warped reconstructed signal uw(k) is input to a Linear Predictor (LP) synthesis filter to derive a CELP decoder time-warped output signal y^w(k). In another embodiment the speech decoder comprises a parametric speech decoder, and where an adaptation of the frame length N in the parametric speech decoder results in the use of a modified frame length Nw.
REFERENCES:
patent: 5583652 (1996-12-01), Ware
patent: 5704003 (1997-12-01), Kleijn et al.
patent: 6169970 (2001-01-01), Kleijn
patent: 6181712 (2001-01-01), Rosengren
patent: 6223151 (2001-04-01), Kleijn et al.
patent: 6259677 (2001-07-01), Jain
patent: 6452950 (2002-09-01), Ohlsson et al.
patent: 6504838 (2003-01-01), Kwan
patent: 6879955 (2005-04-01), Rao
patent: 7110416 (2006-09-01), Selin
patent: 2003/0043856 (2003-03-01), Lakaniemi et al.
patent: 0 921 666 (1999-06-01), None
patent: WO-01/11832 (2000-08-01), None
patent: WO 02/087137 (2002-10-01), None
Kleijn et al, Interpolation of the Pitch-Predictor Parameters in Analysis-by-Synthesis Speech Coders, IEEE, pp. 42-54.
Liu et al, Adaptive Delay Concealment for Internet Voice Application with Packet-Based Time-Scale Modification, IEEE, pp. 1461-1464, 2001.
Verheist, Overlap-Add Methods for Time-Scaling of Speech, University of Brussel, pp. 23, May 1999.
Kleijn et al., “Speech Coding and Synthesis”, 1995, Elsevier Science B.V., Chapter 4 pp. 121-173, Chapter 15 pp. 519-555.
Electronic Industries Alliance, “TR 45 TIA/EIA IS-641-A, TDMA Cellular/PCS—Radio Interface Enhanced Full-Rate Voice Codec, Revision A”, STD.EIA TIA/IS-641-A-Engl 1998, pp. 1-79.
3rdGeneration Partnership Project 2 “3GPP2”, “Enhanced Variable Rate Codec (EVRC)”, 3GPP2 C. S0014-0, Version 1.0, pp. i-C1.
E. Moulines and W. Verhelst, “Time-domain and frequency-domain techniques for prosodic modification of speech”, Speech Coding and Synthesis, Editors W. B. Kleijn and K.K. Paliwal, pp. 519-556, Elsevier Science B. V., 1995.
TIA/EIA/IS-127, “Enhanced variable rate codec, speech service option 3 for wideband spread spectrum digital systems”, Telecommunications Industry Association Draft Document, Feb. 1996
R. J. McAulay and T. F. Quatieri, “Sinusoidal coding”, Speech Coding and Synthesis, Editors W. B. Kleijn and K.K. Paliwal, pp. 121-174, Elsevier Science B. V., 1995.
Kleijn et al., “Speech Coding and Synthesis”, 1995, Elsevier Science B.V., Chapter 4 pp. 121-173, Chapter 15 pp. 519-555.
Electronic Industries Alliance, “TR 45 TIA/EIA IS-641-A, TDMA Cellular/PCS-Radio Interface Enhanced Full-Rate Voice Codec, Revision A”, STD.EIA TIA/IS-641-A-Engl 1998, pp. 1-79.
3rdGeneration Partnership Project 2 “3GPP2”, “Enhanced Variable Rate Codec (EVRC)”, 3GPP2 C. S0014-0, Version 1.0, pp. i-C1, 139 pages, 1999.
Heikkinen Ari
Lakaniemi Ari
Duong Frank
Harrington & Smith PC
Nokia Corporation
LandOfFree
Method and apparatus for reducing synchronization delay in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing synchronization delay in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing synchronization delay in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2791831