Method and apparatus for identifying speech in telephone signals

Details Method and apparatus for identifying speech in telephone signals Method and apparatus for identifying speech in telephone signals

1989-05-15

1990-12-18

Harkcom, Gary V.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 300

Patent

active

049792148

ABSTRACT:
Method and apparatus for identifying telephone signals which are produced by a human voice. The method includes determining a measure of the energy of predetermined frequency bins of the frequency spectrum of the signal for a frame comprised of a predetermined number of consecutive samples of the signal, if the signal is an analog signal; averaging the measure of the energy of the predetermined frequency bins over a predetermined number of frames to provide a frame group average energy measure; determining the sum of the absolute value of the difference between the frame group average energy measure for all pairs of frame groups which are consecutive in time; and comparing the sum with a predetermined amount to identify the signal as having been produced by a human voice if the sum exceeds the predetermined amount.

REFERENCES:
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patent: 4277645 (1981-07-01), May
patent: 4281218 (1981-07-01), Chuang et al.
patent: 4597098 (1986-06-01), Noso et al.
patent: 4677665 (1987-06-01), Walker
patent: 4688256 (1987-08-01), Yasunaga
patent: 4829578 (1989-08-01), Roberts
patent: 4932062 (1990-06-01), Hamilton

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