Low-delay code-excited linear-predictive coding of wideband spee

Details Low-delay code-excited linear-predictive coding of wideband spee Low-delay code-excited linear-predictive coding of wideband spee

1990-06-29

1993-08-10

Knepper, David D.

G10L 900

Patent

active

052356698

ABSTRACT:
An improved digital communication system, e.g., a CELP code/decoder based system, is improved for use with a wide-band signal such as a high-quality speech signal by modifying the noise weighting filter used in such systems to include a filter section which affects primarily the spectral tilt of the weighting filter in addition to a filter component reflecting formant frequency information in the input signal. Alternatively, the weighting is modified to reflect perceptual transform techniques.

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