Very low rate speech encoder and decoder

Details Very low rate speech encoder and decoder Very low rate speech encoder and decoder

1987-09-08

1989-03-21

Salce, Patrick R.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 36, G10L 302

Patent

active

048151343

ABSTRACT:
A speech encoder is disclosed quantizing speech information with respect to energy, voicing and pitch parameters to provide a fixed number of bits per block of frames. Coding of the parameters takes place for each N frames, which comprise a block, irrespective of phonemic boundaries. Certain frames of speech information are discarded during transmission, if such information is substantially duplicated in an adjacent frame. A very low data rate transmission system is thus provided which exhibits a high degree of fidelity and throughput.

REFERENCES:
patent: 4216354 (1980-08-01), Esteban et al.
patent: 4386237 (1983-05-01), Virupaksha et al.
patent: 4718087 (1988-01-01), Papamichalis
patent: 4742550 (1988-05-01), Fette
Jayant, "Coding Speech at Low Bit Rates", IEEE Spectrum, Aug. 1986.

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