Telephonic communications – Supervisory or control line signaling – Signalling integrity protection
Patent
1993-03-01
1995-09-12
Dwyer, James L.
Telephonic communications
Supervisory or control line signaling
Signalling integrity protection
379372, 379386, H04M 322
Patent
active
054504848
ABSTRACT:
Voice detector for detecting whether a telephone signal has been produced by a voice. The voice detector obtains, on a per frame basis, measures of the following quantities relating to the telephone signal: total energy; energy and frequency of two largest energy peaks in a frequency spectrum; and signal-to-noise ratio (SNR). If the measure of total energy exceeds a predetermined threshold, the voice detector increments running sums of the following measures: total energy; frequency of the largest peak in the frequency spectrum; and SNR. Until a predetermined number of frames, referred to as a window, has been reached, for each frame, the voice detector determines whether the telephone signal was produced by ringing (incrementing a ring count if it was) and whether there is a local energy maximum (incrementing a local energy maximum count if there was). When the window is reached, the voice detector determines whether, during the window, the telephone signal was produced by ringback (updating adaptive, signal-to-noise and energy parameters if it was). If the telephone signal was not produced by ringback, the voice detector determines whether the telephone signal was produced by a voice by analyzing the running sums, the ring count, the local energy maximum count, and the adaptive, signal-to-noise and energy parameters.
REFERENCES:
patent: 4281218 (1981-07-01), Chuang et al.
patent: 4296277 (1981-10-01), Daneffel
patent: 4667065 (1987-05-01), Bangerter
patent: 4742537 (1988-05-01), Jesurum
patent: 4764966 (1988-08-01), Einkauf et al.
patent: 4932062 (1990-06-01), Hamilton
patent: 4979214 (1990-12-01), Hamilton
patent: 4982341 (1991-01-01), Laurent
patent: 5023906 (1991-06-01), Novas
patent: 5218636 (1993-06-01), Hamilton
patent: 5239574 (1993-08-01), Brandman et al.
patent: 5255340 (1993-10-01), Arnaud et al.
patent: 5311575 (1994-05-01), Oh
patent: 5311588 (1994-05-01), Polcyn et al.
patent: 5319703 (1994-06-01), Drory
patent: 5321745 (1994-06-01), Drory et al.
patent: 5371787 (1994-12-01), Hamilton
"Voice Detection and Discrimination", IBM Technical Disclosure Bulletin, vol. 27 No. 11, Apr. 1985 pp. 6519-6520 (379/351).
"Error Reduction Method for a Digital Signal Processing Voice and Audible Tel. Ring Tone Detection Algorithm" IBM T.D.B., vol. 28, No. 9 Feb. 1986 (379/351).
Dialogic Corporation
Dwyer James L.
Einschlag Michael B.
Weaver Scott L.
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