Method and system for CELP speech coding and codebook for use th

Details Method and system for CELP speech coding and codebook for use th Method and system for CELP speech coding and codebook for use th

1991-10-28

1994-12-06

MacDonald, Allen R.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 36, G10L 914

Patent

active

053718534

ABSTRACT:
Apparatus and method for encoding speech using a codebook excited linear predictive (CELP) speech processor and an algebraic codebook for use therewith. The CELP speech processor receives a digital speech input representative of human speech and performs linear predictive code analysis and perceptual weighting filtering to produce a short term speech information and a long term speech information. The CELP speech processor utilizes an organized, non-overlapping, algebraic codebook containing a predetermined number of vectors, uniformly distributed over a multi-dimensional sphere to generate a remaining speech residual. The short term speech information, long term speech information and remaining speech residual are combinable to form a quality reproduction of the digital speech input.

REFERENCES:
patent: 4797925 (1989-01-01), Lin
patent: 4868867 (1989-09-01), Davidson et al.
patent: 4907276 (1990-03-01), Aldersberg
patent: 5187745 (1993-02-01), Yip et al.
patent: 5195137 (1993-03-01), Swaminathan

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