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

G - Physics

10

L

354/50

G10L 19/12 (2006.01) G10L 19/10 (2006.01) G10L 11/06 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2016462

RD-19,333 HYBRID SWITCHED MULTI-PULSE/STOCHASTIC SPEECH CODING TECHNIQUE ABSTRACT OF THE DISCLOSURE Improved unvoiced speech performance problem 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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