Method and apparatus for adjusting a spectrum shape of a speech

Details Method and apparatus for adjusting a spectrum shape of a speech Method and apparatus for adjusting a spectrum shape of a speech

1996-09-17

1999-01-26

Knepper, David D.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

104224, 104217, 104219, G10L 900

Patent

active

058647988

ABSTRACT:
Adjusting the shape of a spectrum of a speech signal includes the steps of using a first filter with pole-zero transfer function A(z)/B(z) for subjecting a speech signal to a spectrum envelop emphasis and a second filter cascade-connected with the first filter, for compensating for a spectral tilt due to the first filter, independently deriving two filter coefficients used in the second filter for compensating for the spectral tilt from the pole-zero transfer function, and compensating for the spectral tilt corresponding to the pole-zero transfer function according to the derived filter coefficients.

REFERENCES:
patent: 5235669 (1993-08-01), Ordentlich et al.
IEEE Transactions on Speech and Audo Processing, vol. 3, No. 1, pp. 59-71, Jan. 1995, Juin-Hwey Chen, et al., "Adaptive Postfiltering For Quality Enhancement Of Coded Speech".
Pro. IEEE ICASSP, pp. 155-1158, Apr. 1988, W.B. Kleijn, et al., "Improved Speech Quality And Efficient Vector Quantization In Selp".

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