Apparatus for the detection of voice signals

Details Apparatus for the detection of voice signals Apparatus for the detection of voice signals

1980-09-25

1982-11-16

Kemeny, Emanuel S.

179 1VC, H04B 1500

Patent

active

043596045

ABSTRACT:
A detection apparatus for receiving an input signal containing noise and for detecting the presence of voice signals therein comprises means for attenuating the input signal and a comparator of the amplitude of the attenuated input signal relative to a variable threshold voltage. This threshold voltage is generated by control means which make the threshold voltage dependent on the peak amplitude value of the input signal. A control signal corresponding to the detection of voice signals is supplied by decision means which carry out a time analysis of the output signal of the comparator.

REFERENCES:
patent: 3712959 (1973-01-01), Fariello
patent: 3832491 (1974-08-01), Sciulli et al.
patent: 4052568 (1977-10-01), Jankowski
patent: 4187396 (1980-02-01), Luhowy

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