Multi-pulse coding system

Details Multi-pulse coding system Multi-pulse coding system

1987-07-30

1990-03-13

Harkcom, Gary V.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 40, G10L 302

Patent

active

049088637

ABSTRACT:
A digital speech signal sampled at a predetermined interval is stored in a memory. An LPC (Linear Prediction Coefficient) DDK is developed from the speech signal and thus developed LPC coefficient specifies coefficients of a recursive filter. The speech signal read out from the memory is backwardly supplied to the recursive filter in the reverse order to the sampling order of the speech signal. A plurality of multi-pulses are determined on the basis of the crosscorrelation coefficients (between the speech and an impulse response of the recursive filter) obtained by the recursive filter.

REFERENCES:
patent: 4076958 (1978-02-01), Fulghum
patent: 4282405 (1981-08-01), Taguchi
patent: 4301329 (1981-11-01), Taguchi
patent: 4669120 (1987-05-01), Ono
patent: 4720861 (1988-01-01), Bertrand

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