Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Reexamination Certificate
2011-06-14
2011-06-14
Chawan, Vijay B (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
C704S220000, C704S219000, C704S223000, C704S200100, C375S240000, C370S466000
Reexamination Certificate
active
07962333
ABSTRACT:
A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution. The method includes pre-computing weighting factors for a perceptual weighting filter optimized to a specific source and destination codec pair, pre-configuring the transcoding strategies, mapping CELP parameters in the CELP parameter space according to the selected coding strategy, performing Linear Prediction analysis if specified by the transcoding strategy, perceptually weighting the speech using with tuned weighting factors, and searching for adaptive codebook and fixed-codebook parameters to obtain a quantized set of destination codec parameters.
REFERENCES:
patent: 5491771 (1996-02-01), Gupta et al.
patent: 5495555 (1996-02-01), Swaminathan
patent: 5704001 (1997-12-01), Gardner
patent: 5751903 (1998-05-01), Swaminathan et al.
patent: 5845244 (1998-12-01), Proust
patent: 6012024 (2000-01-01), Hofmann
patent: 6026356 (2000-02-01), Yue et al.
patent: 6104992 (2000-08-01), Gao et al.
patent: 6188980 (2001-02-01), Thyssen
patent: 6249758 (2001-06-01), Mermelstein
patent: 6345255 (2002-02-01), Mermelstein
patent: 6604070 (2003-08-01), Gao et al.
patent: 6691085 (2004-02-01), Rotola-Pukkila et al.
patent: 6757649 (2004-06-01), Gao et al.
patent: 6829579 (2004-12-01), Jabri et al.
patent: 6961698 (2005-11-01), Gao et al.
patent: 7184953 (2007-02-01), Jabri et al.
patent: 2002/0016161 (2002-02-01), Dellien et al.
patent: 2002/0077812 (2002-06-01), Masano et al.
patent: 2003/0028386 (2003-02-01), Zinser et al.
patent: 2004/0002856 (2004-01-01), Bhaskar et al.
patent: 2004/0158647 (2004-08-01), Omura
patent: WO 00/48170 (2000-08-01), None
patent: WO 01/69936 (2001-09-01), None
patent: WO 02/080147 (2002-10-01), None
patent: WO 02/080417 (2002-10-01), None
patent: WO 03/058407 (2003-07-01), None
Chen et al., “Improving the Performance of the 16kb/s LD-CELP Speech Coder,” IEEE, Mar. 23, 1992, pp. 69-72.
Kim et al., “An Efficient Transcoding Algorithm for G.723.1 and EVRC Speech Coders”. Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE, VTS 54th, vol. 3, Oct. 7, 2001, pp. 1561-1564.
Chong-White Nicola
Ibrahim Michael
Jabri Marwan A.
Wang Jianwei
Chawan Vijay B
Hoffmann & Baron , LLP
Onmobile Global Limited
LandOfFree
Method for high quality audio transcoding 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 for high quality audio transcoding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for high quality audio transcoding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2721104