WO1998004079A3 - Echo canceler for non-linear circuits - Google Patents
Echo canceler for non-linear circuits Download PDFInfo
- Publication number
- WO1998004079A3 WO1998004079A3 PCT/US1997/012717 US9712717W WO9804079A3 WO 1998004079 A3 WO1998004079 A3 WO 1998004079A3 US 9712717 W US9712717 W US 9712717W WO 9804079 A3 WO9804079 A3 WO 9804079A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microphones
- echo canceler
- echo
- linear circuits
- loudspeaker
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/015—Reducing echo effects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
Abstract
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9710475A BR9710475A (en) | 1996-07-24 | 1997-07-21 | Process and circuit to cancel an echo signal |
DE69709363T DE69709363T2 (en) | 1996-07-24 | 1997-07-21 | ECHOCOMPENSATOR FOR NON-LINEAR CIRCUITS |
PL97331238A PL185318B1 (en) | 1996-07-24 | 1997-07-21 | Echo attenuating system in non-linear circuits |
EEP199900024A EE03842B1 (en) | 1996-07-24 | 1997-07-21 | Method for canceling an echo signal in an audio circuit |
JP50715598A JP4046197B2 (en) | 1996-07-24 | 1997-07-21 | Echo canceller for nonlinear circuits |
EP97934237A EP0914721B1 (en) | 1996-07-24 | 1997-07-21 | Echo canceler for non-linear circuits |
KR1019980710472A KR100338657B1 (en) | 1996-07-24 | 1997-07-21 | Echo Canceller for Nonlinear Circuits |
AU37342/97A AU719049B2 (en) | 1996-07-24 | 1997-07-21 | Echo canceler for non-linear circuits |
HK99105143A HK1019982A1 (en) | 1996-07-24 | 1999-11-09 | Echo canceler for non-linear circuits |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/685,495 US5796819A (en) | 1996-07-24 | 1996-07-24 | Echo canceller for non-linear circuits |
US08/685,495 | 1996-07-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998004079A2 WO1998004079A2 (en) | 1998-01-29 |
WO1998004079A3 true WO1998004079A3 (en) | 1998-03-19 |
Family
ID=24752439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/012717 WO1998004079A2 (en) | 1996-07-24 | 1997-07-21 | Echo canceler for non-linear circuits |
Country Status (13)
Country | Link |
---|---|
US (1) | US5796819A (en) |
EP (1) | EP0914721B1 (en) |
JP (1) | JP4046197B2 (en) |
KR (1) | KR100338657B1 (en) |
CN (1) | CN1169312C (en) |
AU (1) | AU719049B2 (en) |
BR (1) | BR9710475A (en) |
DE (1) | DE69709363T2 (en) |
EE (1) | EE03842B1 (en) |
HK (1) | HK1019982A1 (en) |
MY (1) | MY122083A (en) |
PL (1) | PL185318B1 (en) |
WO (1) | WO1998004079A2 (en) |
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Also Published As
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WO1998004079A2 (en) | 1998-01-29 |
BR9710475A (en) | 1999-08-17 |
KR20000065243A (en) | 2000-11-06 |
JP2000515345A (en) | 2000-11-14 |
EE03842B1 (en) | 2002-08-15 |
CN1226349A (en) | 1999-08-18 |
EE9900024A (en) | 1999-08-16 |
PL331238A1 (en) | 1999-07-05 |
PL185318B1 (en) | 2003-04-30 |
MY122083A (en) | 2006-03-31 |
AU3734297A (en) | 1998-02-10 |
DE69709363D1 (en) | 2002-01-31 |
HK1019982A1 (en) | 2000-03-03 |
EP0914721B1 (en) | 2001-12-19 |
DE69709363T2 (en) | 2002-08-22 |
CN1169312C (en) | 2004-09-29 |
KR100338657B1 (en) | 2002-09-19 |
EP0914721A2 (en) | 1999-05-12 |
JP4046197B2 (en) | 2008-02-13 |
US5796819A (en) | 1998-08-18 |
AU719049B2 (en) | 2000-05-04 |
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