Speech coding and decoding apparatus

Details Speech coding and decoding apparatus Speech coding and decoding apparatus

1995-11-22

2000-05-30

Tung, Kee M.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, 704223, 704262, 704264, G10L 900

Patent

active

RE0367214

ABSTRACT:
A speech signal is input to an excitation signal generating section, a prediction filter and a prediction parameter calculator. The prediction parameter calculator calculates a predetermined number of prediction parameters (LPC parameter or reflection coefficient) by an autocorrelation method or covariance method, and supplies the acquired prediction parameters to a prediction parameter coder. The codes of the prediction parameters are sent to a decoder and a multiplexer. The decoder sends decoded values of the codes of the prediction parameters to the prediction filter and the excitation signal generating section. The prediction filter calculates a prediction residual signal, which is the difference between the input speech signal and the decoded prediction parameter, and sends it to the excitation signal generating section. The excitation signal generating section calculates the pulse interval and amplitude for each of a predetermined number of subframes based on the input speech signal, the prediction residual signal and the quantized value of the prediction parameter, and sends them to the multiplexer. The multiplexer combines these codes and the codes of the prediction parameters, and send the results as an output signal of a coding apparatus to a transmission path or the like.

REFERENCES:
patent: 4736428 (1988-04-01), Deprettere et al.
patent: 4811396 (1989-03-01), Yatsuzuka
patent: 4864621 (1989-09-01), Boyd
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: 4964169 (1990-10-01), Ono
patent: 5060268 (1991-10-01), Asakawa et al.
ICASSP '89, Glasgow, 23-26 May 1989, V1 pp. 148-151, IEEE, NY Akamine et al "ARMA model based Speech Coding at 8KB/S".
EUROCON '88, Stockholm, 13-17 Jun., 1988, pp. 24-27, IEEE, NY Lever et al; "RPCELP: A high quality and low complexity scheme for narrow band coding of speech".
ICASSP '85, Tampa, Fla, 26-29 Mar. 85, V4, pp. 1429-1432 IEEE NY, Wake et al, "A multple LPC speech codec using DSP".
ICDSC-7 (7th Intl. Conf. on Digital Satellite Comm), Munich, 12-16 May 86 pp. 785-790, VDE-Verlag GmbH, Berlin, DE. Araseki et al, "A high quality multi pulse LPC Coder for Speech trans. below 16 KBPS".
IEEE Trans. ASSP-34, pp. 1034-1063, "RPE-A novel Approach to effective and Efficient Multipulse Coding of Speech." Kroon et al. Oct. 1986.
IEEE, ICASSP '85, pp. 937-940, "CELP-high quality speech a very low bid rates", Atal et al, 1985.
"High Quality Audio Coding Using Multi-pulse LPC " by Sharad Singhal, ICASSP '99: Acoustics, Speech & Signal Processing Conference, 1990.

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