Re-phasing of decoder states after packet loss

Details Re-phasing of decoder states after packet loss Re-phasing of decoder states after packet loss

2011-08-23

2011-08-23

Chawan, Vijay (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Synthesis

C704S229000, C704S230000, C704S258000, C704S220000, C455S070000, C455S045000, C455S205000, C455S307000, C341S143000, C700S094000

Reexamination Certificate

active

08005678

ABSTRACT:
A technique is described herein for updating a state of a decoder configured to decode a series of frames representing an encoded audio signal. In accordance with the technique, an output audio signal associated with a lost frame in the series of frames is synthesized. The decoder state is set to align with the synthesized output audio signal at a frame boundary. An extrapolated signal is generated based on the synthesized output audio signal. A time lag is calculated between the extrapolated signal and a decoded audio signal associated with a first received frame after the lost frame in the series of frames, wherein the time lag represents a phase difference between the extrapolated signal and the decoded audio signal. The decoder state is then reset based on the time lag.

REFERENCES:
patent: 4935963 (1990-06-01), Jain
patent: 6351730 (2002-02-01), Chen
patent: 6408267 (2002-06-01), Proust
patent: 6549587 (2003-04-01), Li
patent: 6665637 (2003-12-01), Bruhn
patent: 7031926 (2006-04-01), Makinen et al.
patent: 7047187 (2006-05-01), Cheng et al.
patent: 7047190 (2006-05-01), Kapilow
patent: 7177804 (2007-02-01), Wang et al.
patent: 7233893 (2007-06-01), Sung et al.
patent: 7272554 (2007-09-01), Serizawa et al.
patent: 7467072 (2008-12-01), Adam
patent: 7467082 (2008-12-01), Sung et al.
patent: 7502734 (2009-03-01), Jelinek
patent: 7619995 (2009-11-01), El-Hennawey et al.
patent: 7693710 (2010-04-01), Jelinek et al.
patent: 7707034 (2010-04-01), Sun et al.
patent: 7805293 (2010-09-01), Takada et al.
patent: 2002/0080779 (2002-06-01), LeBlanc
patent: 2002/0102942 (2002-08-01), Taori et al.
patent: 2002/0123887 (2002-09-01), Unno
patent: 2003/0074197 (2003-04-01), Chen
patent: 2003/0200083 (2003-10-01), Serizawa et al.
patent: 2004/0078194 (2004-04-01), Liljeryd et al.
patent: 2005/0015242 (2005-01-01), Gracie et al.
patent: 2005/0154584 (2005-07-01), Jelinek et al.
patent: 2006/0045138 (2006-03-01), Black et al.
patent: 2007/0147518 (2007-06-01), Bessette
patent: 2007/0150262 (2007-06-01), Mori et al.
patent: 2007/0174047 (2007-07-01), Anderson et al.
patent: 2007/0213976 (2007-09-01), Sung et al.
patent: 2007/0225971 (2007-09-01), Bessette
patent: 2008/0027711 (2008-01-01), Rajendran et al.
patent: 2008/0027715 (2008-01-01), Rajendran et al.
patent: 2008/0033585 (2008-02-01), Zopf
patent: 2008/0046233 (2008-02-01), Chen et al.
patent: 2008/0046236 (2008-02-01), Thyssen et al.
patent: 2008/0046248 (2008-02-01), Chen et al.
patent: 2008/0046249 (2008-02-01), Thyssen et al.
patent: 2008/0046252 (2008-02-01), Zopf et al.
patent: 2008/0092019 (2008-04-01), Lakaniemi et al.
patent: 2008/0126086 (2008-05-01), Vos et al.
patent: 2009/0232228 (2009-09-01), Thyssen
patent: 2009/0240492 (2009-09-01), Zopf et al.
patent: 2009/0299755 (2009-12-01), Ragot et al.
patent: 2009/0319264 (2009-12-01), Yoshida et al.
patent: 2010/0121646 (2010-05-01), Ragot et al.
patent: 2010/0228541 (2010-09-01), Oshikiri
patent: 1096477 (2001-05-01), None
patent: 1288916 (2003-03-01), None
patent: 1684267 (2006-07-01), None
patent: 2008022176 (2008-02-01), None
patent: 2008022176 (2008-02-01), None
patent: 2008022181 (2008-02-01), None
patent: 2008022181 (2008-02-01), None
patent: 2008022184 (2008-02-01), None
patent: 2008022184 (2008-02-01), None
patent: 2008022200 (2008-02-01), None
patent: 2008022200 (2008-02-01), None
patent: 2008022207 (2008-02-01), None
patent: 2008022207 (2008-02-01), None
Chibani, Mohamed et al., “Resynchronization of the Adaptive Codebook in a Constrained CELP CODEC After a Frame Erasure”, Acoustics, Speech and Signal Processing, ICASSP 2006 Proceedings, IEEE International Conference, Toulouse, (May 14-19, 2006), pp. 1-13.
Thyssen, Jes et al., “A Candidate for the ITU-T G.722 Packet Loss Concealment Standard”, ICASSP, (Apr. 15, 2007), pp. 549-552.
Serizawa, Masahiro et al., “A Packet Loss Concealment Method Using Pitch Waveform Repetition and Internal State Update on the Decoded Speech for the Sub-band ADPCM Wideband Speech CODEC”, Speech Coding, IEEE Workshop Proceedings, (Oct. 6-9, 2002), pp. 68-70.
Shetty, Niranjan et al., “Improving the Robustness of the G.722 Wideband Speech Codec to Packet Losses for Voice over WLANS”, Acoustics, Speech and Signal Processing, ICASSP Proceedings, IEEE International Conference, Toulouse, (May 14-19, 2006), pp. V365-V368.
Thyssen, Jes et al., “Detailed Description of the Broadcom G. 722 PLC Candidate Algorithm”, ITU Study Group 16, (Nov. 2006), 37 pages.
“Coding of Speech at 16 kbit/s using low-delay code excited linear prediction”, Frame or Packet loss concealment for the LD—celp decoder, (May 1, 1999), 20 pages.
“KHz audio-coding within 64 kbit/s G.722 (Nov. 1988)”, ITU-T Standard in Force (I), (Nov. 25, 1988), 76 pages.
Goodman et al, “Waveform Substitution Techniques for Recovering Missing Speech Segments in Packet Voice Communications”, IEEE Transactions on Acoustics, Speech and Signal Processing, Dec. 1986, vol. 34, No. 6, pp. 1440-1448.

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