Low-delay low-bit-rate speech coder

Details Low-delay low-bit-rate speech coder Low-delay low-bit-rate speech coder

1990-05-14

1992-08-25

Fleming, Michael R.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 36, G10L 908

Patent

active

051425831

ABSTRACT:
A vector quantizing speech coder includes a Short-Term-Predictive filter which receives originally sampled speech signal s(n) and decorrelates it into a residual signal r(n). A device is provided to quantize the residual signal r(n) at a low bit rate. The device also generates a reconstructed signal r(n) from which coefficients for adjusting the Short-Term-Predictive filter are dynamically derived.

REFERENCES:
patent: 4752956 (1988-06-01), Sluijter
patent: 4757517 (1988-07-01), Yatsuzuka
patent: 4924508 (1990-05-01), Crepy et al.
patent: 4933957 (1990-06-01), Bottau et al.
patent: 4965789 (1990-10-01), Bottau et al.
IBM TDB, vol. 29, No. 2, Jul. 1986, pp. 929-930 "Multipulse Excited Linear Predictive Coder".
ICASSP 86 (IEEE-IECEJ-ASJ) Int. Conf. on Acoustics, Speech & Signal Processing, Apr. 7-11, 1986, vol. 3, pp. 1693-1696.

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