Inverse control system

Details Inverse control system Inverse control system

1986-03-14

1987-07-28

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, 381 83, 381 93, 381 66, H04B 1500, G10K 1116, G11B 300

Patent

active

046835903

ABSTRACT:
An inverse control system is disclosed, which comprises FIR filters provided between transmitting elements at n (n=2, 3, . . . ) input points of a linear FIR system and a common signal source, for an inverse control such as to provide desired impulse responses between the signal source and m (n>m) output points of the linear FIR system. A j-th (j=1, 2, . . . , n) one of the FIR filters has a number L.sub.j of taps which satisfies the relationships represented by ##EQU1## for all i=1, 2, . . . , m and j=1, 2 . . . , n where w.sub.ij is the number of discrete signals representing the impulse response g.sub.ij (k) between the j-th output point and i-output point and P.sub.i is the number of discrete signals representing the desired impulse response r.sub.i (k) between the signal source and i-th output point. The j-th FIR filters has a filter coefficient h.sub.j (k) satisfying the relationship ##EQU2## where .circle.* is a discrete convolution.

REFERENCES:
patent: 4493101 (1985-01-01), Muraoka
patent: 4536887 (1985-08-01), Kaneda
patent: 4589137 (1986-05-01), Miller
patent: 4596033 (1986-06-01), Swinbans
patent: 4622660 (1986-11-01), Cowans

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