Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1990-04-13
1992-08-11
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 38, 381 40, 381 49, 395 2, G10L 500
Patent
active
051386623
ABSTRACT:
A speech coding apparatus which selects an optimum code from a code book, the optimum code giving the minimum magnitude of error signal between the input signal and the reproduced signal obtained by a filter calculation using a linear prediction parameter from a linear predictive analysis unit with respect to the codes of the code book, wherein the code book is formed by thinning to 1/M (M being an integer of two or more) the plurality of sampling values constituting the codes. To compensate for the deterioration of the quality of the reproduced signal caused by thinning the sampling values in this way, an additional linear predictive analysis unit is further introduced and use made of an amended linear prediction parameter instead of the linear prediction parameter from the originally provided linear predictive analysis unit.
REFERENCES:
patent: 4817157 (1989-03-01), Gerson
Sharad Singhal "On Encoding Filter Parameters for Stochastic Coders" pp. 1633-1636 1987 IEEE.
M. R. Schroeder & B. S. Atal "Code-Excited Linear Prediction(CELP) High-Quality Speech at Very Low Bit Rates" pp. 937-940 1985 IEEE.
European Search Report Completed Feb. 28, 1991 by Examiner Armspach J.F.A.M. at The Hague.
Grant Davidson and Allen Gersho, Complexity Reduction Methods For Vector Excitation Coding, 1986 IEEE, pp. 3055-3058.
Akira Ichikawa, Shoichi Takeda and Yoshiaki Asakawa, "A Speech Coding Method Using Thinned-Out Residual", 1985 IEEE, pp. 961-964.
Richard C. Rose and Mark A. Clements, "All-Pole Speech Modeling With A Maximally Pulse-Like Residual", 1985 IEEE, pp. 481-484.
Amano Fumio
Ota Yasuji
Tanaka Yoshinori
Taniguchi Tomohiko
Unagami Shigeyuki
Fujitsu Limited
Kemeny Emanuel S.
LandOfFree
Speech coding apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Speech coding apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech coding apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-352995