1974-07-18
1976-04-20
Claffy, Kathleen H.
179 1SA, G10L 100
Patent
active
039521648
ABSTRACT:
A speech transmission system employing a semi-vocoder comprising a spectral analyzer and a spectral synthesizer for the upper frequency range of the speech signal. The speech signal in the low frequency range base band is transmitted by using delta modulation and the delta-modulated base band signal is used directly in the receiver as a voice excitation signal for the spectral synthesizer.
REFERENCES:
patent: 3030450 (1962-04-01), Shroeder
patent: 3750024 (1973-07-01), Dunn et al.
Cartier Michel
David Guy Albert Jules
Ferrieu Gilbert Marie Marcel
Lorand Pierre
Claffy Kathleen H.
Etat Francais
Kemeny E. S.
Steckler Henry I.
Telecommunications Radioelectriques et Telephoniques T.R.T.
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