JPS4710751A - - Google Patents
Info
- Publication number
- JPS4710751A JPS4710751A JP9116771A JP9116771A JPS4710751A JP S4710751 A JPS4710751 A JP S4710751A JP 9116771 A JP9116771 A JP 9116771A JP 9116771 A JP9116771 A JP 9116771A JP S4710751 A JPS4710751 A JP S4710751A
- Authority
- JP
- Japan
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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
- H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8963370A | 1970-11-16 | 1970-11-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4710751A true JPS4710751A (US20080094685A1-20080424-C00004.png) | 1972-05-30 |
| JPS5732530B1 JPS5732530B1 (US20080094685A1-20080424-C00004.png) | 1982-07-12 |
Family
ID=22218725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9116771A Pending JPS5732530B1 (US20080094685A1-20080424-C00004.png) | 1970-11-16 | 1971-11-16 |
Country Status (10)
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS497677A (US20080094685A1-20080424-C00004.png) * | 1972-05-27 | 1974-01-23 | ||
| JPS4913582A (US20080094685A1-20080424-C00004.png) * | 1972-05-20 | 1974-02-06 | ||
| JPS4989727U (US20080094685A1-20080424-C00004.png) * | 1972-11-21 | 1974-08-03 | ||
| JPS4989923A (US20080094685A1-20080424-C00004.png) * | 1972-12-29 | 1974-08-28 | ||
| JPS4992616A (US20080094685A1-20080424-C00004.png) * | 1972-12-30 | 1974-09-04 | ||
| JPS5019019A (US20080094685A1-20080424-C00004.png) * | 1973-05-29 | 1975-02-28 | ||
| JPS5047079A (US20080094685A1-20080424-C00004.png) * | 1974-08-21 | 1975-04-26 | ||
| JPS5048225U (US20080094685A1-20080424-C00004.png) * | 1973-08-28 | 1975-05-13 | ||
| JPS5117025A (US20080094685A1-20080424-C00004.png) * | 1974-07-24 | 1976-02-10 | Teves Gmbh Alfred | |
| JPS5120952A (US20080094685A1-20080424-C00004.png) * | 1974-08-16 | 1976-02-19 | Yuken Kogyo Co Ltd | |
| JPS5147613A (US20080094685A1-20080424-C00004.png) * | 1974-10-22 | 1976-04-23 | Sumitomo Precision Prod Co | |
| JPS5151683A (US20080094685A1-20080424-C00004.png) * | 1974-10-29 | 1976-05-07 | Daikin Ind Ltd | |
| JPS5232018U (US20080094685A1-20080424-C00004.png) * | 1975-08-29 | 1977-03-07 | ||
| JPS5459575A (en) * | 1966-12-13 | 1979-05-14 | Ind & Handelsmij | Fluid control valve |
| JPS54122425A (en) * | 1978-07-25 | 1979-09-22 | Daikin Ind Ltd | Direct current system electromagnetic changeeover valve |
| JPS5438720B1 (US20080094685A1-20080424-C00004.png) * | 1971-05-11 | 1979-11-22 | ||
| JPS551053U (US20080094685A1-20080424-C00004.png) * | 1979-03-22 | 1980-01-07 | ||
| JPS55115604A (en) * | 1980-02-27 | 1980-09-05 | Daikin Ind Ltd | Fluid control system |
| JPS55132403A (en) * | 1979-03-26 | 1980-10-15 | Renault | Hydraulic servo valve |
| JPS56154042A (en) * | 1980-03-06 | 1981-11-28 | Nissei Plastics Ind Co | Hydraulic device for opening and closing dies of molding machine |
| JPS5937305A (ja) * | 1983-04-07 | 1984-02-29 | Daikin Ind Ltd | 流体装置 |
| JPS5980504A (ja) * | 1983-04-07 | 1984-05-10 | Daikin Ind Ltd | 流体装置 |
| JPS60157574A (ja) * | 1984-01-28 | 1985-08-17 | Hitachi Constr Mach Co Ltd | 電磁比例弁 |
| JPS63110777U (US20080094685A1-20080424-C00004.png) * | 1987-01-09 | 1988-07-16 | ||
| JPS6443278U (US20080094685A1-20080424-C00004.png) * | 1987-09-11 | 1989-03-15 |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3894200A (en) * | 1973-10-10 | 1975-07-08 | Communications Satellite Corp | Adaptive echo canceller with digital center clipping |
| US3946170A (en) * | 1973-11-29 | 1976-03-23 | Brooks Fred A | Self regulating telephone sets |
| US3941948A (en) * | 1973-11-29 | 1976-03-02 | Brooks Fred A | Four-wire interface regulator for long distance trunk circuits |
| US4144417A (en) * | 1975-03-07 | 1979-03-13 | Kokusai Denshin Denwa Kabushiki Kaisha | Echo cancelling system |
| US4031338A (en) * | 1976-02-10 | 1977-06-21 | Communications Satellite Corporation (Comsat) | Echo suppressor using frequency-selective center clipping |
| US4644108A (en) * | 1982-10-27 | 1987-02-17 | International Business Machines Corporation | Adaptive sub-band echo suppressor |
| DE3331928A1 (de) * | 1982-11-12 | 1984-06-14 | Comdial Consumer Communications Corp., El Monte, Calif. | Voll-duplex lautsprechertelefon |
| US4894820A (en) * | 1987-03-24 | 1990-01-16 | Oki Electric Industry Co., Ltd. | Double-talk detection in an echo canceller |
| DE3728109C1 (de) * | 1987-08-22 | 1989-03-16 | Telefonbau & Normalzeit Gmbh | Verfahren fuer die sprachgesteuerte Daempfungsregelung in Fernsprechuebertragungskreisen |
| US5305307A (en) * | 1991-01-04 | 1994-04-19 | Picturetel Corporation | Adaptive acoustic echo canceller having means for reducing or eliminating echo in a plurality of signal bandwidths |
| US5307405A (en) * | 1992-09-25 | 1994-04-26 | Qualcomm Incorporated | Network echo canceller |
| US5321848A (en) * | 1992-09-28 | 1994-06-14 | H.M. Electronics, Inc. | Drive-up station full duplex communication system and method of using same |
| US5471527A (en) * | 1993-12-02 | 1995-11-28 | Dsc Communications Corporation | Voice enhancement system and method |
| EP0847180A1 (en) * | 1996-11-27 | 1998-06-10 | Nokia Mobile Phones Ltd. | Double talk detector |
| SG71035A1 (en) * | 1997-08-01 | 2000-03-21 | Bitwave Pte Ltd | Acoustic echo canceller |
| US6031908A (en) * | 1997-11-14 | 2000-02-29 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having variable adaptive gain settings |
| US6198819B1 (en) * | 1997-11-14 | 2001-03-06 | Tellabs Operations, Inc. | Echo canceller having improved non-linear processor |
| US6442275B1 (en) | 1998-09-17 | 2002-08-27 | Lucent Technologies Inc. | Echo canceler including subband echo suppressor |
| KR100279825B1 (ko) * | 1998-12-23 | 2001-02-01 | 윤종용 | 교환기에서 에코 및 측음 현상을 제거하는 회로 |
| US6798881B2 (en) * | 1999-06-07 | 2004-09-28 | Acoustic Technologies, Inc. | Noise reduction circuit for telephones |
| US6963642B1 (en) * | 1999-12-30 | 2005-11-08 | Acoustic Technology, Inc. | Band-by-band full duplex communication |
| US10367948B2 (en) * | 2017-01-13 | 2019-07-30 | Shure Acquisition Holdings, Inc. | Post-mixing acoustic echo cancellation systems and methods |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3370294A (en) * | 1964-05-13 | 1968-02-20 | Leonard R. Kahn | Communications echo suppression |
| GB1108415A (en) * | 1966-05-06 | 1968-04-03 | Int Standard Electric Corp | Echo suppression in long distance telephone circuits |
| US3500000A (en) * | 1966-10-31 | 1970-03-10 | Myldred P Kelly | Self-adaptive echo canceller |
| GB1207368A (en) * | 1966-12-24 | 1970-09-30 | Consiglio Nazionale Ricerche | A system and device for selective echo suppression and noise reduction in telephone circuits |
| US3585311A (en) * | 1969-09-02 | 1971-06-15 | Bell Telephone Labor Inc | Speech processor using contiguous multiband center-clipping |
-
1970
- 1970-11-16 US US89633A patent/US3699271A/en not_active Expired - Lifetime
-
1971
- 1971-06-01 CA CA114506A patent/CA933690A/en not_active Expired
- 1971-11-09 SE SE7114324A patent/SE379467B/xx unknown
- 1971-11-10 AU AU35553/71A patent/AU459672B2/en not_active Expired
- 1971-11-12 BE BE775247A patent/BE775247A/xx not_active IP Right Cessation
- 1971-11-15 IT IT70731/71A patent/IT951701B/it active
- 1971-11-15 FR FR7140816A patent/FR2113979B1/fr not_active Expired
- 1971-11-15 DE DE19712156647 patent/DE2156647A1/de not_active Ceased
- 1971-11-16 GB GB5303271A patent/GB1343656A/en not_active Expired
- 1971-11-16 JP JP9116771A patent/JPS5732530B1/ja active Pending
-
1974
- 1974-10-11 US US05/513,991 patent/USRE28919E/en not_active Expired - Lifetime
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5464274A (en) * | 1966-12-13 | 1979-05-23 | Ind & Handelsmij | Device of controlling hydraulic pressure driving gear |
| JPS5459575A (en) * | 1966-12-13 | 1979-05-14 | Ind & Handelsmij | Fluid control valve |
| JPS5438720B1 (US20080094685A1-20080424-C00004.png) * | 1971-05-11 | 1979-11-22 | ||
| JPS4913582A (US20080094685A1-20080424-C00004.png) * | 1972-05-20 | 1974-02-06 | ||
| JPS497677A (US20080094685A1-20080424-C00004.png) * | 1972-05-27 | 1974-01-23 | ||
| JPS4989727U (US20080094685A1-20080424-C00004.png) * | 1972-11-21 | 1974-08-03 | ||
| JPS4989923A (US20080094685A1-20080424-C00004.png) * | 1972-12-29 | 1974-08-28 | ||
| JPS4992616A (US20080094685A1-20080424-C00004.png) * | 1972-12-30 | 1974-09-04 | ||
| JPS5019019A (US20080094685A1-20080424-C00004.png) * | 1973-05-29 | 1975-02-28 | ||
| JPS5048225U (US20080094685A1-20080424-C00004.png) * | 1973-08-28 | 1975-05-13 | ||
| JPS5117025A (US20080094685A1-20080424-C00004.png) * | 1974-07-24 | 1976-02-10 | Teves Gmbh Alfred | |
| JPS5120952A (US20080094685A1-20080424-C00004.png) * | 1974-08-16 | 1976-02-19 | Yuken Kogyo Co Ltd | |
| JPS5047079A (US20080094685A1-20080424-C00004.png) * | 1974-08-21 | 1975-04-26 | ||
| JPS5147613A (US20080094685A1-20080424-C00004.png) * | 1974-10-22 | 1976-04-23 | Sumitomo Precision Prod Co | |
| JPS5151683A (US20080094685A1-20080424-C00004.png) * | 1974-10-29 | 1976-05-07 | Daikin Ind Ltd | |
| JPS5232018U (US20080094685A1-20080424-C00004.png) * | 1975-08-29 | 1977-03-07 | ||
| JPS54122425A (en) * | 1978-07-25 | 1979-09-22 | Daikin Ind Ltd | Direct current system electromagnetic changeeover valve |
| JPS551053U (US20080094685A1-20080424-C00004.png) * | 1979-03-22 | 1980-01-07 | ||
| JPS55132403A (en) * | 1979-03-26 | 1980-10-15 | Renault | Hydraulic servo valve |
| JPS55115604A (en) * | 1980-02-27 | 1980-09-05 | Daikin Ind Ltd | Fluid control system |
| JPS56154042A (en) * | 1980-03-06 | 1981-11-28 | Nissei Plastics Ind Co | Hydraulic device for opening and closing dies of molding machine |
| JPS5937305A (ja) * | 1983-04-07 | 1984-02-29 | Daikin Ind Ltd | 流体装置 |
| JPS5980504A (ja) * | 1983-04-07 | 1984-05-10 | Daikin Ind Ltd | 流体装置 |
| JPS60157574A (ja) * | 1984-01-28 | 1985-08-17 | Hitachi Constr Mach Co Ltd | 電磁比例弁 |
| JPS63110777U (US20080094685A1-20080424-C00004.png) * | 1987-01-09 | 1988-07-16 | ||
| JPS6443278U (US20080094685A1-20080424-C00004.png) * | 1987-09-11 | 1989-03-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| AU459672B2 (en) | 1975-04-10 |
| CA933690A (en) | 1973-09-11 |
| SE379467B (US20080094685A1-20080424-C00004.png) | 1975-10-06 |
| IT951701B (it) | 1973-07-10 |
| DE2156647A1 (de) | 1972-05-31 |
| FR2113979A1 (US20080094685A1-20080424-C00004.png) | 1972-06-30 |
| BE775247A (fr) | 1972-03-01 |
| USRE28919E (en) | 1976-07-27 |
| FR2113979B1 (US20080094685A1-20080424-C00004.png) | 1975-02-07 |
| AU3555371A (en) | 1973-05-17 |
| JPS5732530B1 (US20080094685A1-20080424-C00004.png) | 1982-07-12 |
| US3699271A (en) | 1972-10-17 |
| GB1343656A (US20080094685A1-20080424-C00004.png) | 1974-01-16 |
