Hybrid switched multi-pulse/stochastic speech coding technique

Details Hybrid switched multi-pulse/stochastic speech coding technique Hybrid switched multi-pulse/stochastic speech coding technique

1989-05-18

1991-10-22

Shaw, Dale M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 36, G10L 500

Patent

active

050602691

ABSTRACT:
Improved unvoiced speech performance in low-rate multi-pulse coders is achieved by employing a multi-pulse architecture that is simple in implementation but with an output quality comparable to code excited linear predictive (CELP) coding. A hybrid architecture is provided in which a stochastic excitation model that is used during unvoiced speech is also capable of modeling voiced speech by use of random codebook excitation. A modified method for calculating the gain during stochastic excitation is also provided.

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