Method and apparatus for improved quality voice transcoding

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C704S220000, C704S200100, C704S222000, C704S223000, C704S229000

Reexamination Certificate

active

10754468

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: 5845244 (1998-12-01), Proust
patent: 6012024 (2000-01-01), Hofmann
patent: 6026356 (2000-02-01), Yue et al.
patent: 6188980 (2001-02-01), Thyssen
patent: 6249758 (2001-06-01), Mermelstein
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: 2002/0077812 (2002-06-01), Masano et al.
patent: 2004/0158647 (2004-08-01), Omura
patent: 00/48170 (2000-08-01), None
patent: 01/69936 (2001-09-01), None
patent: 02/080417 (2002-10-01), None
patent: 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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for improved quality voice 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 and apparatus for improved quality voice transcoding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for improved quality voice transcoding will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3839147

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.