Active controller using lattice-type filter and active control m

Details Active controller using lattice-type filter and active control m Active controller using lattice-type filter and active control m

1994-10-13

1998-06-30

Kuntz, Curtis

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Counterwave generation control path

381 941, 36472419, H03B 2900, A61F 1106

Patent

active

057745641

ABSTRACT:
An active controller suppressing an incoming acoustic wave by active control includes a signal processing unit filtering, an input signal corresponding to the incoming acoustic wave to generate an output signal, an error detecting portion detecting an error between the output signal and a desired response value, and an adapting portion adjusting a filtering characteristic of the signal processing portion according to the input signal, the output signal, and an error signal such that the error is minimized. The signal processing portion includes a non-recursive all zero digital filter filtering an input signal, and a lattice-type multi-stage all pole digital filter further filtering an output signal of the non-recursive all zero digital filter. The adapting portion updates a filter coefficient of the signal processing portion adaptively while clipping an absolute value exceeding one of a filter coefficient of the lattice-type multi-stage all pole digital filter.

REFERENCES:
patent: 4677677 (1987-06-01), Eriksson
patent: 5014232 (1991-05-01), Andre
patent: 5315621 (1994-05-01), Lucioni et al.
patent: 5337366 (1994-08-01), Eguchi et al.
patent: 5426597 (1995-06-01), Herchen, Jr. et al.
patent: 5499302 (1996-03-01), Nagami et al.
patent: 5581495 (1996-12-01), Adkins et al.
"Lattice Form Adaptive Recursive Digital Filters: Algorithms and Applications", S. Horvath, Jr., Institute of Applied Physics, IEEE Int'l. Conf. on Circuits & Systems, 1980, pp. 128-133.
"Recursive Lattice Forms for Spectral Estimation and Adaptive Control", B. Friedlaner, IEEE Conf. on Decision and Control, 1980, pp. 466-471.
Eriksson, L.J. "The Selection and Application of an IIR Adaptive Filter for Use in Active Sound Attenuation" IEEE Apr. 1987.

Affiliated with

Also associated with

Rating

Active controller using lattice-type filter and active control m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Active controller using lattice-type filter and active control m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active controller using lattice-type filter and active control m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1868705