Vocoder system

Details Vocoder system Vocoder system

1975-05-23

1977-08-30

Brown, Thomas W.

Registers

Coded record sensors

Particular sensor structure

235156, G10L 100

Patent

active

040456161

ABSTRACT:
The Laplace transform (s-plane) is obtained for contiguous or overlapping frames of speech (or other signals) and polepair parameters (frequency, damping, magnitude and phase) are selected for transmission so as to preserve maximum energy. Speech is reconstructed from the transmitted parameters, using, for example, a damped sine wave as the equivalent of a pole pair. No separate pitch determination is made, nor is a voiced/unvoiced decision required.

REFERENCES:
patent: 3360610 (1968-12-01), Flanagan
patent: 3484556 (1969-12-01), Flanagan
patent: 3581078 (1971-01-01), Robison
patent: 3624302 (1971-11-01), Atal
patent: 3638004 (1972-01-01), Sloane
patent: 3702393 (1973-01-01), Fuss
patent: 3925648 (1975-12-01), Speiser
Robinson et al, "A Computer Method of Z Transformers," IEEE Trans Aud and Electro AC, Mar., 1972.
Cooper et al, Methods of Signal and System Analysis, Holt, Rinehart & Winston, 1967.

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