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Class Information
Number: 379/406.03
Name: Telephonic communications > Echo cancellation or suppression > Combined diverse function > Additional signal enhancement (e.g., voice processing or recognition)
Description: Subject matter including means to improve the quality of the signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7555116 |
Real time processing and management method for cancelling out the echo between a loudspeaker and a microphone of a computer terminal |
Jun. 30, 2009 |
| 7536006 |
Method and system for near-end detection |
May. 19, 2009 |
| 7480377 |
Dual adaptive filter apparatus and method |
Jan. 20, 2009 |
| 7443978 |
Method and apparatus for audio coding with noise suppression |
Oct. 28, 2008 |
| 7428304 |
Method and apparatus for detecting subscriber alerting signal tones and customer premises equipment alerting signal tones to non-echo canceling modems |
Sep. 23, 2008 |
| 7330738 |
Apparatus and method for canceling residual echo in a mobile terminal of a mobile communication system |
Feb. 12, 2008 |
| 7236586 |
Synchronization of echo cancellers in a voice processing system |
Jun. 26, 2007 |
| 7146003 |
Noise level calculator for echo canceller |
Dec. 5, 2006 |
| 7120246 |
Computer apparatus having a multiway acoustic output and input system |
Oct. 10, 2006 |
| 7065206 |
Method and apparatus for adaptive echo and noise control |
Jun. 20, 2006 |
| 7050576 |
Double talk, NLP and comfort noise |
May. 23, 2006 |
| 7050545 |
Methods and apparatus for echo cancellation using an adaptive lattice based non-linear processor |
May. 23, 2006 |
| 7043014 |
Apparatus and method for time-alignment of two signals |
May. 9, 2006 |
| 7039181 |
Consolidated voice activity detection and noise estimation |
May. 2, 2006 |
| 7039182 |
Echo canceller having improved noise immunity |
May. 2, 2006 |
| 7027593 |
Apparatus and method for echo control |
Apr. 11, 2006 |
| 7003099 |
Small array microphone for acoustic echo cancellation and noise suppression |
Feb. 21, 2006 |
| 7003097 |
Synchronization of echo cancellers in a voice processing system |
Feb. 21, 2006 |
| 6999582 |
Echo cancelling/suppression for handsets |
Feb. 14, 2006 |
| 6996164 |
Self-interference removal using converter compensation in a relayed communication system |
Feb. 7, 2006 |
| 6970558 |
Method and device for suppressing noise in telephone devices |
Nov. 29, 2005 |
| 6963642 |
Band-by-band full duplex communication |
Nov. 8, 2005 |
| 6952473 |
System and method for echo assessment in a communication network |
Oct. 4, 2005 |
| 6947549 |
Echo canceller |
Sep. 20, 2005 |
| 6925174 |
Interaction between echo canceller and packet voice processing |
Aug. 2, 2005 |
| 6839427 |
Method and apparatus for echo canceller automatic gain control |
Jan. 4, 2005 |
| 6826279 |
Base band echo cancellation using laguerre echo estimation |
Nov. 30, 2004 |
| 6813352 |
Quadrature filter augmentation of echo canceler basis functions |
Nov. 2, 2004 |
| 6757384 |
Robust double-talk detection and recovery in a system for echo cancelation |
Jun. 29, 2004 |
| 6748542 |
Timed disconnect switch for data and telephone circuits |
Jun. 8, 2004 |
| 6744885 |
ASR talkoff suppressor |
Jun. 1, 2004 |
| 6744884 |
Speaker-phone system change and double-talk detection |
Jun. 1, 2004 |
| 6741874 |
Method and apparatus for reducing echo feedback in a communication system |
May. 25, 2004 |
| 6718041 |
Echo attenuating method and device |
Apr. 6, 2004 |
| 6718036 |
Linear predictive coding based acoustic echo cancellation |
Apr. 6, 2004 |
| 6694018 |
Echo canceling apparatus and method, and voice reproducing apparatus |
Feb. 17, 2004 |
| 6625284 |
Comfort noise generating apparatus |
Sep. 23, 2003 |
| 6614907 |
Echo canceller employing dual-H architecture having variable adaptive gain settings |
Sep. 2, 2003 |
| 6603836 |
Interactive voice response apparatus capable of distinguishing between user's incoming voice and outgoing conditioned voice prompts |
Aug. 5, 2003 |
| 6597787 |
Echo cancellation device for cancelling echos in a transceiver unit |
Jul. 22, 2003 |
| 6577731 |
Method and apparatus of cancelling multi-channel echoes |
Jun. 10, 2003 |
| 6560332 |
Methods and apparatus for improving echo suppression in bi-directional communications systems |
May. 6, 2003 |
| 6546099 |
Arrangement for suppressing an interfering component of an input signal |
Apr. 8, 2003 |
| 6526139 |
Consolidated noise injection in a voice processing system |
Feb. 25, 2003 |
| 6526140 |
Consolidated voice activity detection and noise estimation |
Feb. 25, 2003 |
| 6522746 |
Synchronization of voice boundaries and their use by echo cancellers in a voice processing system |
Feb. 18, 2003 |
| 6510224 |
Enhancement of near-end voice signals in an echo suppression system |
Jan. 21, 2003 |
| 6507653 |
Desired voice detection in echo suppression |
Jan. 14, 2003 |
| 6505163 |
Network and method for providing an automatic recall telecommunications service with automatic speech recognition capability |
Jan. 7, 2003 |
| 6498850 |
Multichannel echo canceller with a compander |
Dec. 24, 2002 |
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