Product code memory Itakura-Saito (MIS) measure for sound recogn

Details Product code memory Itakura-Saito (MIS) measure for sound recogn Product code memory Itakura-Saito (MIS) measure for sound recogn

1992-04-15

1993-12-28

Fleming, Michael R.

G10L 900

Patent

active

052747395

ABSTRACT:
A SOUND RECOGNITION PROCESS comprises training a sound recognition system to a shape Hidden Markov Model (HMM) from a shape codebook of shape codewords, and to a separate gain HMM from a gain codebook of gain codewords. An unknown token is assigned to the sound category associated with the shape HMM and gain HMM with the greatest probability product. Shape and gain codewords replacements for incoming Linear Predictive Coded (LPC) vectors are selected by choosing the codeword with minimum distortion between the codeword and a combination of the vector and some of the preceding codewords, exponentially weighted by time.

REFERENCES:
patent: 4718087 (1988-01-01), Papamichalis
patent: 4819271 (1989-04-01), Bahl et al.
patent: 4827521 (1989-05-01), Bahl et al.
patent: 4977598 (1990-12-01), Doddington et al.
patent: 5072452 (1991-12-01), Brown et al.

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