| Patent Number |
Title Of Patent |
Date Issued |
| 7599432 |
Method and apparatus for dynamically inserting gain in an adaptive filter system |
October 6, 2009 |
| A method and apparatus for dynamically inserting gain in an adaptive filter is taught. This selective insertion of gain may be used to allow an adaptive filter to converge more quickly and/or to overcome inherent limitations of the adaptive filter. An echo canceller (e.g. 20 and 22 in |
| 7555075 |
Adjustable noise suppression system |
June 30, 2009 |
| Methods and corresponding systems for suppressing noise in an input signal include setting a minimum overall gain in a noise reduction processor for processing a first frame of data associated with the input signal. In response to a new minimum overall gain being set, the minimum overall |
| 7529363 |
Tone detector and method therefor |
May 5, 2009 |
| A tone detector able to detect multicomponent tones for various tone formats is disclosed. An input signal is received and frequency and amplitude components, if any, of each sample of the incoming signal are estimated. In estimating the components, a current digit value is used to a |
| 7388954 |
Method and apparatus for tone indication |
June 17, 2008 |
| A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector wh |
| 7242762 |
Monitoring and control of an adaptive filter in a communication system |
July 10, 2007 |
| A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector wh |
| 7215765 |
Method and apparatus for pure delay estimation in a communication system |
May 8, 2007 |
| A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector wh |
| 7016488 |
Method and apparatus for non-linear processing of an audio signal |
March 21, 2006 |
| A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector wh |
| 6961423 |
Method and apparatus for performing adaptive filtering |
November 1, 2005 |
| A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector wh |
