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Class Information
Number: 370/290
Name: Multiplex communications > Duplex > Transmit/receive interaction control > Echo suppression or cancellation > Using a particular adaptive filter
Description: Subject matter having a filtering apparatus which adapts itself to the varying echo signal to suppress or cancel the echo in the main or primary signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7408891 |
Echo canceller employing H-register and storage register |
Aug. 5, 2008 |
| 7352687 |
Mixed domain cancellation |
Apr. 1, 2008 |
| 7280493 |
Method for hardware reduction in echo canceller and near-end crosstalk canceller |
Oct. 9, 2007 |
| 7277403 |
Duplexer with a differential receiver port implemented using acoustic resonator elements |
Oct. 2, 2007 |
| 7239660 |
Adaptive filter with GSPT LMS algorithm for reducing complexity |
Jul. 3, 2007 |
| 7155018 |
System and method facilitating acoustic echo cancellation convergence detection |
Dec. 26, 2006 |
| 7142518 |
Monitoring communications networks |
Nov. 28, 2006 |
| 7136471 |
Method and apparatus for detecting a secondary destination of a telephone call based on changes in the telephone signal path |
Nov. 14, 2006 |
| 7133442 |
Rapid identification of transmission media channel characteristics |
Nov. 7, 2006 |
| 7113491 |
Method and system for varying an echo canceller filter length based on data rate |
Sep. 26, 2006 |
| 7103015 |
DSL transmission system with means for ensuring local echo orthogonality |
Sep. 5, 2006 |
| 7085245 |
Coefficient domain history storage of voice processing systems |
Aug. 1, 2006 |
| 7065056 |
Transceiver circuit including an echo canceller |
Jun. 20, 2006 |
| 7058315 |
Fast decision threshold controller for burst-mode receiver |
Jun. 6, 2006 |
| 7031269 |
Acoustic echo canceller |
Apr. 18, 2006 |
| 7020068 |
Echo and crosstalk cancellation |
Mar. 28, 2006 |
| 7016487 |
Digital echo cancellation device |
Mar. 21, 2006 |
| 7006458 |
Echo canceller disabler for modulated data signals |
Feb. 28, 2006 |
| 7002897 |
Multiple channel interference cancellation |
Feb. 21, 2006 |
| 6980528 |
Voice and data exchange over a packet based network with comfort noise generation |
Dec. 27, 2005 |
| 6957109 |
Distributed control system and filtering method used in the distributed control system |
Oct. 18, 2005 |
| 6956830 |
Line echo cancellation system |
Oct. 18, 2005 |
| 6947395 |
Locating network echos |
Sep. 20, 2005 |
| 6928110 |
Adaptive equalizer training circuit, modem apparatus and communication apparatus |
Aug. 9, 2005 |
| 6912209 |
Voice gateway with echo cancellation |
Jun. 28, 2005 |
| 6894989 |
Separation circuit for an echo canceling system and method of operating the same |
May. 17, 2005 |
| 6873704 |
Apparatus for removing echo from speech signals with variable rate |
Mar. 29, 2005 |
| 6831900 |
Filter cell, method of deriving an echo component and an echo canceling system employing the same |
Dec. 14, 2004 |
| 6816592 |
Echo cancellation in digital data transmission system |
Nov. 9, 2004 |
| 6807228 |
Dynamic regulation of power consumption of a high-speed communication system |
Oct. 19, 2004 |
| 6804204 |
Apparatus for a digital echo canceller and method therefor |
Oct. 12, 2004 |
| 6804203 |
Double talk detector for echo cancellation in a speech communication system |
Oct. 12, 2004 |
| 6792107 |
Double-talk detector suitable for a telephone-enabled PC |
Sep. 14, 2004 |
| 6785327 |
Multiported register file for burst mode coefficient updating |
Aug. 31, 2004 |
| 6778601 |
Adaptive audio equalizer apparatus and method of determining filter coefficient |
Aug. 17, 2004 |
| 6771701 |
Adaptive filter divergence control in echo cancelers by means of amplitude distribution evaluation with configurable hysteresis |
Aug. 3, 2004 |
| 6771591 |
Method and system for processing orthogonal frequency division multiplexed signals |
Aug. 3, 2004 |
| 6754187 |
Performance enhancement system for digital PBX |
Jun. 22, 2004 |
| 6751313 |
Method and apparatus for an improved echo canceller |
Jun. 15, 2004 |
| 6744887 |
Acoustic echo processing system |
Jun. 1, 2004 |
| 6738358 |
Network echo canceller for integrated telecommunications processing |
May. 18, 2004 |
| 6738418 |
Method and apparatus for adaptive data allocation in a multi-carrier communication system |
May. 18, 2004 |
| 6738480 |
Method and device for cancelling stereophonic echo with frequency domain filtering |
May. 18, 2004 |
| 6735181 |
Wireless transceiver with subtractive filter compensating both transmit and receive artifacts |
May. 11, 2004 |
| 6697486 |
Echo canceler and operating method |
Feb. 24, 2004 |
| 6687288 |
NEXT cancellation for modem pools |
Feb. 3, 2004 |
| 6687373 |
Heusristics for optimum beta factor and filter order determination in echo canceler systems |
Feb. 3, 2004 |
| 6678254 |
Method and communication device for optimizing echo cancellation |
Jan. 13, 2004 |
| 6671374 |
ADAPTIVE FILTER FOR ECHO CANCELLATION, METHOD FOR OPERATING AN ADAPTIVE FILTER FOR ECHO CANCELLATION, AN ARTICLE OF MANUFACTURE FOR DETERMINING TAP WEIGHTS AND A LENGTH FOR AN ADAPTIVE FILTER |
Dec. 30, 2003 |
| 6654463 |
Round trip delay estimator and compensator for the echo canceller |
Nov. 25, 2003 |
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