Speech compressor using trellis encoding and linear prediction

Details Speech compressor using trellis encoding and linear prediction Speech compressor using trellis encoding and linear prediction

1996-06-18

1997-08-19

MacDonald, Allen R.

395251, 395214, G10L 302, G10L 900

Patent

active

056596596

ABSTRACT:
A speech compressor utilizing Trellis Encoding and Linear Prediction (TELP). A TELP speech compressor provides improved signal generation and search technique for a code-excited linear prediction (CELP) speech encoder. TELP is a frame oriented coding that breaks the quantized speech signals into frames of prescribed length N and each frame into subframes of prescribed length L, which are processed as dependent units utilizing an analysis-by-synthesis approach. The approach is based on constructing the best mean square linear predicting filter and searching the best exciting sequence for the filter in order to produce synthesized speech. A trellis encoder is used instead of a stochastic code book. The Q-ary analysis of a given subframe and previous excitations is proposed for a fast vector search in an adaptive code book. It simplifies the implementation of digital speech compression.

REFERENCES:
patent: 4472832 (1984-09-01), Atal et al.
patent: 4736428 (1988-04-01), Deprettere et al.
patent: 4790016 (1988-12-01), Mazor et al.
patent: 4817157 (1989-03-01), Gerson
patent: 4868867 (1989-09-01), Davidson et al.
patent: 4896361 (1990-01-01), Gerson
patent: 4912764 (1990-03-01), Hartwell et al.
patent: 4914701 (1990-04-01), Zibman
patent: 4924508 (1990-05-01), Crepy et al.
patent: 4932061 (1990-06-01), Kroon et al.
patent: 4944013 (1990-07-01), Gouvianakis et al.
patent: 4969192 (1990-11-01), Chen et al.
patent: 4980916 (1990-12-01), Zinser
patent: 5012518 (1991-04-01), Liu et al.
patent: 5060269 (1991-10-01), Zinser
patent: 5073940 (1991-12-01), Zinser et al.
patent: 5177799 (1993-01-01), Naitoh
patent: 5187745 (1993-02-01), Yip et al.
patent: 5195137 (1993-03-01), Swaminathan
patent: 5199076 (1993-03-01), Taniguchi et al.
patent: 5222189 (1993-06-01), Fielder
patent: 5233659 (1993-08-01), Ahlberg
patent: 5235671 (1993-08-01), Mazor
patent: 5255339 (1993-10-01), Fette et al.
patent: 5369724 (1994-11-01), Lim
patent: 5388181 (1995-02-01), Anderson et al.
patent: 5394508 (1995-02-01), Lim
patent: 5414796 (1995-05-01), Jacobs et al.
Zinser, Richard L., Koch, Steven R., "Celp Coding at 4.0 KB/SEC and Below: Improvements to FS-1016," IEEE, (1992), pp. I313-I316.
Lupini, Peter, Cox, Neil B., Cuperman, Vladimir, "A Multi-Mode Variable Rate Celp Coder Based on Frame Classification," pp. 406-409.
Wang, Shihua, Gersho, Allen, "Improved Phonetically-Segmented Vector Excitation Coding at 3.4 KB/S," IEEE, (1992), pp. I349-I352.
Xiongwei, Zhang, Xianzhi, Chen, "A New Excitation Model for LPC Vocoder at 2.4 KB/S," IEEE, pp. I65-I68.
Liu, Y.J., "On Reducing the Bit Rate of a Celp-Based Speech Coder," IEEE, (1992) pp. I49-I52.
Hussain, Yunus, Farvardin, Nariman, "Finite-State Vector Quantization Over Noisy Channels and its Application to LSP Parameters," IEEE, (1992) pp. II133-II136.
Haagen, Jesper, Neilsen, Henrik, Hansen, Steffen Duus, "Improvements in 2.4 KBPS High-Quality Speech Coding," IEEE, (1992) pp. II145-II148.
Babkin, V.F., "A Universal Encoding Method With Nonexponential Work Expenditure for a Source of Independent Messages," Translated from Problemy Peredachi Informatsii, vol. 7, No. 4, pp. 13-21, Oct.-Dec. 1971, pp. 288-294.
Trellis-Searched Adaptive Prediction Coding Malone et al., IEEE/ Dec. 1988.
Enumeration and Trellis Searched Coding Schemes for Speech LSP Parameters Malone et al., IEEE/Jul. 1993.
Joseph P. Campbell, Jr., The New 4800 bps Coding Standard, Nov. 14, 1989, Military & Government Speech Tech '89, pp. 1-4.
Bishnu S. Atal, Predictive Coding of Speech at Low Bit Rates, Apr. 1982, IEEE Transactions on Communications, vol. Com-30, No. 4, pp. 600-614.
Grant Davidson, complexity Reduction Methods For Vector Excitation Coding, 1986, IEEE, pp. 3055-3058.
Thomas J. Lynch, Data Compression Techniques And Applications, 1985, pp. 32-33.

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