Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Reexamination Certificate
2006-01-20
2008-09-16
Azad, Abul (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
C704S226000
Reexamination Certificate
active
07426465
ABSTRACT:
In a speech signal decoding method, information containing at least a sound source signal, gain, and filter coefficients is decoded from a received bit stream. Voiced speech and unvoiced speech of a speech signal are identified using the decoded information. Smoothing processing based on the decoded information is performed for at least either one of the decoded gain and decoded filter coefficients in the unvoiced speech. The speech signal is decoded by driving a filter having the decoded filter coefficients by an excitation signal obtained by multiplying the decoded sound source signal by the decoded gain using the result of the smoothing processing. A speech signal decoding apparatus is also disclosed.
REFERENCES:
patent: 5267317 (1993-11-01), Kleign
patent: 5752223 (1998-05-01), Aoyagi et al.
patent: 5848387 (1998-12-01), Nishiguchi et al.
patent: 5946651 (1999-08-01), Jarvinen et al.
patent: 6088670 (2000-07-01), Takada
patent: 6098036 (2000-08-01), Zinser, Jr. et al.
patent: 6122611 (2000-09-01), Su et al.
patent: 6202046 (2001-03-01), Oshikiri et al.
patent: 6377915 (2002-04-01), Sasaki
patent: 7050968 (2006-05-01), Murashima
patent: 2112145 (1994-06-01), None
patent: 0731348 (1996-09-01), None
patent: 9-244695 (1997-09-01), None
patent: 10-083200 (1998-03-01), None
patent: 10-124097 (1998-05-01), None
patent: 10-222194 (1998-08-01), None
patent: 11-133997 (1999-05-01), None
M. R. Schroeder, “Code-exited linear predictioon: High-quality speech at very low bit rates”,Proc. Of IEE Int. Conf. On Acoust., Speech and Signal Processing, pp. 937-940 (1985).
“Digital Cellular Telecommunication System; Adaptive Multi-Rate Speech Transcoding”,ETSI Technical ReportGSM 06-90 version 2.0.0, pp. 3-66, Jan. 1999.
K. Ozawa et al, “M-LCELP Speech Coding at 4 kb/s with Multi-Mode and Multi-Codebook”,IEICE Trans. On Commun., vol. E77-B, No. 9, pp. 1114-1121, (Sep. 1994).
L. R. Rabiner et al, “Digital processing of Speech Signals”, Prentice-Hall, pp. 396-419, (1978).
Taniguchi et al., “Enhancement of VSELP Coded Speech Under Background Noise,” 1995 IEEE Workshop on Speech Coding for Telecommunications, Sep. 20, 1995, pp. 67-68.
Ekudden et al., “The Adaptive Multi-rate Speech Coder,” Speech Coding Proceedings, 1999 IEEE Workshop on Porvoo, Finland Jun. 2-23, 1999, Piscataway, NJ, USA, IEEE, US, Jun. 20, 1999, pp. 117-119.
Azad Abul
Foley & Lardner LLP
NEC Corporation
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