Low bit rate voice coding method and device

Details Low bit rate voice coding method and device Low bit rate voice coding method and device

1989-07-03

1993-07-27

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 38, Q10L 500

Patent

active

052316696

ABSTRACT:
In a voice coding system, the baseband or residual signal is encoded at a lower rate by finding a best estimate at a lower rate. The voice terminal signal x(n) is split into a low-pass filtered band signal y1(n) and a high-pass filtered band signal y2(n). Both y1(n) and y2(n) signals are coded into lower-rate sub-sequences of samples x1(n), x2(n) and x3(n), x4(n) respectively. The sequence of samples to be representative of x(n) is selected among x1(n), x2(n), x3(n) and x4(n) for being the closest to x(n).

REFERENCES:
patent: 4771465 (1988-09-01), Bronson et al.
patent: 4811398 (1989-03-01), Copperi et al.

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