Method for speech coding based on a code excited linear predicti

Details Method for speech coding based on a code excited linear predicti Method for speech coding based on a code excited linear predicti

1997-06-26

2000-06-06

Wieland, Susan

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704223, G10L 914

Patent

active

060730927

ABSTRACT:
The invention provides a method for speech coding using Code-Excited Linear Prediction (CELP) producing toll-quality speech at data rates between 4 and 16 Kbit/s. The invention uses a series of baseline, implied and adaptive codebooks, comprised of pulse and random codebooks, with associated gain vectors, to characterize the speech. Improved quantization and search techniques to achieve real-time operation, based on the codebooks and gains, are also provided.

REFERENCES:
patent: 5664055 (1997-09-01), Kroon
patent: 5717824 (1998-02-01), Chhatwal
patent: 5787391 (1998-07-01), Moriya et al.

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