Double mode long term prediction in speech coding

Details Double mode long term prediction in speech coding Double mode long term prediction in speech coding

1993-01-26

1996-09-03

MacDonald, Allen R.

395 23, 395 232, G10L 900

Patent

active

055531911

ABSTRACT:
A method of coding a sampled speech signal vector in an analysis-by-synthesis coding procedure includes the step of forming an optimum excitation vector comprising a linear combination of a code vector from a fixed code book and a long term predictor vector. A first estimate of the long term predictor vector is formed in an open loop analysis. A second estimate of the-long term predictor vector is formed in a closed loop analysis. Finally, each of the first and second estimates are combined in an exhaustive search with each code vector of the fixed code book to form that excitation vector that gives the best coding of the speech signal vector.

REFERENCES:
patent: 4868867 (1989-09-01), Davidson et al.
patent: 4932061 (1990-06-01), Kroon et al.
patent: 5097508 (1992-03-01), Valenzuela Stuede et al.
patent: 5199076 (1993-03-01), Taniguchi et al.
patent: 5233660 (1993-08-01), Chen
patent: 5271089 (1993-12-01), Ozawa
patent: 5359696 (1994-10-01), Gerson et al.
patent: 5414796 (1995-05-01), Jacobs et al.
Adavl et al., "Fast CELP Coding Based on Azgebrate Codes," ICASSP, Apr. 6-9, 1987, pp. 1957-60.
Schroeder et al., "Code-Excited Linear Prediction (CELP):High Quality Speech at Very Low Bit Rates" ICASSP, pp. 937-940, Mar. 1985.
Kroon et al., "Strategies for Improving SAE Performance of CELP Coders at Low Bit Rates" ICASSP, 1988, pp. 151-154.
P. Kabal et al., "Synthesis Filter Optimization and Coding: Applications to CELP" IEEE ICASSP-88, New York, 1988, pp. 147-150.
W. Kleijn et al., "Improved Speech Quality and Efficient Vector Quantization in SELP" IEEE ICASSP-88, New York, 1988, pp. 155-158.
P. Kroon et al., "On the Use of Pitch Predictors with High Temporal Resolution" IEEE Trans. on Signal Processing, vol. 39, No. 3, pp. 733-735 (Mar. 1991).
R. Ramachandran et al., "Pitch Prediction Filters in Speech Coding", IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. 37, No. 4, pp. 467-478 (Apr. 1989).

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