Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1997-02-11
2000-01-11
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704220, G10L 914
Patent
active
060146192
ABSTRACT:
In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and the synthetic signal is selected. In order to reduce the complexity of the search for the best excitation signal, thee selection is done in two stages. First a preselection of a small number of excitation sequences is made using a reduced complexity synthesis filter. Thereafter, with this small number of excitation sequences, a full complexity search is made. Due to the reduced number of excitation sequences involved in the final selection the required computational complexity is reduced.
REFERENCES:
patent: 5384891 (1995-01-01), Asakawa et al.
patent: 5671327 (1997-09-01), Akamine et al.
patent: 5699483 (1997-12-01), Tanaka
patent: 5717823 (1998-02-01), Kleijn
patent: 5729655 (1998-03-01), Kolesnik et al.
patent: 5732389 (1998-03-01), Kroon et al.
Veeneman and Mazor, "An Efficient Code Structure and Search Strategy for Stochastic Coding at 8 kb/s," International Conference on Acoustics, Speech, and Signal Processing, ICASSP-90, vol. 1, pp. 481 to 484, Apr. 1990.
Galand et al., "Complexity reduction of CELP coders," SBT/IEEE International Telecommunications Symposium, pp. 181 to 185, Sep. 1990.
"Codebook Searching for 4.8 kbps CELP Speech Coder" W. Grieder et al, Communications, Computers & Power in the Modern Environment vol. May 1993 pp. 397-406.
De Bont Fransiscus M. J.
Kathmann Eric
Sluijter Robert J.
Wuppermann Friedhelm
Hudspeth David R.
Lerner Martin
Slobod Jack D.
U.S. Philips Corporation
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