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Class Information
Number: 370/289
Name: Multiplex communications > Duplex > Transmit/receive interaction control > Echo suppression or cancellation > Having residual echo cancellation or suppression
Description: Subject matter wherein an apparatus is provided to cancel or suppress the echo remaining after the main echo has been suppressed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5315585 |
Echo canceller using two residual echoes |
May. 24, 1994 |
| 5305307 |
Adaptive acoustic echo canceller having means for reducing or eliminating echo in a plurality of signal bandwidths |
Apr. 19, 1994 |
| 5283784 |
Echo canceller processing techniques and processing |
Feb. 1, 1994 |
| 5280473 |
Modem with echo cancellation |
Jan. 18, 1994 |
| 5274705 |
Nonlinear processor for an echo canceller and method |
Dec. 28, 1993 |
| 5263020 |
Echo canceller |
Nov. 16, 1993 |
| 5247512 |
Echo canceller |
Sep. 21, 1993 |
| 5237562 |
Echo path transition detection |
Aug. 17, 1993 |
| 5166924 |
Echo cancellation in multi-frequency differentially encoded digital communications |
Nov. 24, 1992 |
| 5157653 |
Residual echo elimination with proportionate noise injection |
Oct. 20, 1992 |
| 5136577 |
Sub-band acoustic echo canceller |
Aug. 4, 1992 |
| 5117418 |
Frequency domain adaptive echo canceller for full-duplex data transmission |
May. 26, 1992 |
| 5084865 |
Echo canceller having FIR and IIR filters for cancelling long tail echoes |
Jan. 28, 1992 |
| 5029204 |
Operational status controller for echo canceling |
Jul. 2, 1991 |
| 5018134 |
Method for cancelling echo in a transmitter and an apparatus therefor |
May. 21, 1991 |
| 5008923 |
Testable echo cancelling method and device |
Apr. 16, 1991 |
| 5007047 |
Adaptive rate control for echo cancelling modem |
Apr. 9, 1991 |
| 4896318 |
Method for cancelling echo in a transmitter and an apparatus therefor |
Jan. 23, 1990 |
| 4894820 |
Double-talk detection in an echo canceller |
Jan. 16, 1990 |
| 4862450 |
Arrangement for cancelling a composite echo signal |
Aug. 29, 1989 |
| 4785445 |
Method of manufacturing BaPb.sub.1-x Bi.sub.x O.sub.3 single crystal |
Nov. 15, 1988 |
| 4751730 |
Process and system for improving echo cancellation within a transmission network |
Jun. 14, 1988 |
| 4697261 |
Linear predictive echo canceller integrated with RELP vocoder |
Sep. 29, 1987 |
| 4549048 |
Digital echo canceller |
Oct. 22, 1985 |
| 4481385 |
Arrangement for cancelling echo signals |
Nov. 6, 1984 |
| 4362909 |
Echo canceler with high-pass filter |
Dec. 7, 1982 |
| 4334128 |
Echo canceler for homochronous data transmission systems |
Jun. 8, 1982 |
| 4072830 |
Variable phase shifter for adaptive echo cancellers |
Feb. 7, 1978 |
| 4064378 |
Echo cancelling system for multiplex telephone circuits |
Dec. 20, 1977 |
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