Electrical audio signal processing systems and devices – Including amplitude or volume control – Automatic
Patent
1993-11-04
1996-07-02
Isen, Forester W.
Electrical audio signal processing systems and devices
Including amplitude or volume control
Automatic
381 56, H03G 300
Patent
active
055331360
ABSTRACT:
An attenuating circuit for attenuating commercial interruptions in an audio signal, the audio signal including at least a first channel audio signal and a second channel audio signal; the attenuating circuit including a first audio channel detection circuit and a second audio channel detection circuit, each of the audio channel detection circuits including a low pass filter mechanism for receiving the audio signal and for passing only low frequency components of the audio signal, with the low frequency components being beneath a determined frequency; a low frequency comparator circuit for generating a low frequency detection signal whenever the amplitude of the low frequency components exceed a first threshold value; a high pass filter mechanism for receiving the audio signal and for passing only high frequency components of the audio signal, the high frequency components being above the determined frequency; and a high frequency comparator circuit for generating a high frequency detection signal whenever the amplitude of said high frequency components exceed a second threshold value. Finally, the circuit includes a logic circuit for receiving the low frequency detection signals and the high frequency detection signals and for generating an attenuating signal if, and only if, both of the low frequency detection signals are active and both of the high frequency detection signals are null; and an attenuation circuit for receiving the attenuation signal and for substantially attenuating the strength of the audio signal whenever the attenuation signal is active.
REFERENCES:
patent: 3321581 (1967-05-01), Zryd et al.
patent: 3873926 (1975-03-01), Wright
patent: 4044309 (1977-08-01), Smith
patent: 4162457 (1979-07-01), Grodinsky
patent: 4292467 (1981-09-01), Odlen et al.
patent: 4414689 (1983-11-01), Enderson
patent: 4506377 (1985-03-01), Kishi et al.
patent: 4694497 (1987-09-01), Kasai et al.
patent: 5107539 (1992-04-01), Kato et al.
patent: 5170490 (1992-12-01), Cannon et al.
patent: 5301236 (1994-04-01), Iizuka et al.
Baker David L.
Isen Forester W.
Sullivan Sean F.
LandOfFree
Circuit for attenuating commercial interruptions during radio br does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit for attenuating commercial interruptions during radio br, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for attenuating commercial interruptions during radio br will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1514122