×

Variable block size adaptation algorithm for noise-robust acoustic echo cancellation

  • US 5,546,459 A
  • Filed: 11/01/1993
  • Issued: 08/13/1996
  • Est. Priority Date: 11/01/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. An adaptive filter in a communications channel comprising:

  • noise computation means for monitoring noise content in the communications channel and for providing a monitor signal indicative of the noise content in the channel;

    block size selection means for determining a variable adaptation block size value in response to said monitor signal;

    filter coefficient computation means for receiving said variable adaptation block size value and for determining at least one filter tap correction value in response to said variable adaptation block size value; and

    filter means for receiving at said least one filter tap correction value and for filtering a signal present in communications channel in accordance with said at least one filter tap correction value.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×