Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent
1992-12-01
1994-01-18
Isen, Forester W.
Electrical audio signal processing systems and devices
Sound effects
Reverberators
381 98, 381 18, H03G 300, H03G 500, H04R 500
Patent
active
052805280
ABSTRACT:
A method and apparatus for generating control voltage signals in a surround sound processor is disclosed which utilizes a on-shot monostable multivibrator for minimizing intermodulation distortion while following rapid directional change yet minimizing intermodulation distortion. The apparatus includes means for smoothing the directional information signals derived from audio input signals each with a continuously variable time constant to generate a corresponding control voltage signal, such that each time constant depends inversely upon the magnitude of the difference between the directional information signal applied thereto and the corresponding control voltage signal generated thereby. A one-shot means temporarily reduces the value of the continuously variable time constant associated with each of the smoothing means to a predetermined minimum value for a short, predetermined time period so that each of the corresponding control voltage signals rapidly approaches the value of its corresponding directional information signal within this time period, the one-shot being activated when the difference between any one of the directional information signals and its corresponding control voltage signal exceeds a predetermined threshold value. Other improvements are incorporated in the surround sound processor to optimize its performance.
REFERENCES:
patent: 3632886 (1972-01-01), Scheiber
patent: 3708631 (1973-01-01), Bauer et al.
patent: 3746792 (1973-07-01), Scheiber
patent: 3836715 (1974-09-01), Ito et al.
patent: 3864516 (1975-02-01), Kameoka et al.
patent: 3883692 (1975-05-01), Tsurushima
patent: 3883832 (1975-05-01), Fosgate
patent: 3885099 (1975-05-01), Tsurushima
patent: 3943287 (1976-03-01), Gravereaux et al.
patent: 3944735 (1976-03-01), Willcocks
patent: 3959590 (1976-05-01), Scheiber
patent: 4306200 (1981-12-01), Takayama
patent: 4704728 (1987-11-01), Scheiber
patent: 4706287 (1987-11-01), Blackmer et al.
patent: 4891839 (1990-01-01), Scheiber
patent: 4932059 (1990-06-01), Fosgate
patent: 5046098 (1991-09-01), Mandell et al.
Isen Forester W.
Lee P. W.
McCombs David L.
LandOfFree
Band pass filter circuit for rear channel filtering in a surroun does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Band pass filter circuit for rear channel filtering in a surroun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Band pass filter circuit for rear channel filtering in a surroun will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1141585