Noise suppressor

Details Noise suppressor Noise suppressor

1992-12-30

1994-10-04

MacDonald, Allen R.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 46, 395 271, G10L 914

Patent

active

053534085

ABSTRACT:
A code conversion table, in which a code of a voice with noise added thereto and a code of a voice without noise are associated with each other in terms of probability, is referred to in a code converter. Using the code converter, a code is obtained in a vector quantizer by vector-quantizing cepstrum coefficients extracted from the voice with noise added thereto, and is converted into a code of a voice obtained by suppressing the noise in the voice with noise added thereto. Linear predictive coefficients are obtained from the code, and the voice signal is reproduced in a synthesis filter according to the linear predictive coefficients.

REFERENCES:
patent: 4696039 (1987-09-01), Doddington
patent: 4811404 (1989-03-01), Vilmur et al.
patent: 5012519 (1991-04-01), Adlersberg et al.
patent: 5168524 (1992-12-01), Kroecher et al.

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