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ROBUST PROCESS FOR MANAGING FILTER COEFFICIENTS IN ADAPTIVE NOISE CANCELING SYSTEMS

  • US 20140072134A1
  • Filed: 09/09/2012
  • Published: 03/13/2014
  • Est. Priority Date: 09/09/2012
  • Status: Active Grant
First Claim
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1. A system for managing the changing state of an adaptive filter in an active noise control (ANC) system, comprising:

  • an adaptive filter state storage that is to store copies of prior states of the adaptive filter;

    a disturbance detector; and

    an adaptive filter state manager that is to a) signal that a copy of a current state of the adaptive filter be repeatedly written to the state storage so long as the disturbance detector is detecting normal ambient noise,and b) signal that the adaptive filter be restored to one of its prior states, from the copies stored in the state storage, when the disturbance detector detects abnormal noise.

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