DE3887786D1 - Elektronisches Fernmeldegerät mit Rauschunterdrückungsfunktion. - Google Patents

Elektronisches Fernmeldegerät mit Rauschunterdrückungsfunktion.

Info

Publication number: DE3887786D1
Authority: DE; Germany
Prior art keywords: noise reduction; telecommunication device; reduction function; electronic telecommunication; electronic
Prior art date: 1987-07-15
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.): Expired - Fee Related

Application number

DE88111401T

Other languages

English (en)

Other versions

DE3887786T2 (de

Inventor

Juro Ohga

Kensaku Fujii

Hiroyuki Masuda

Yuka Sato

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Fujitsu Ltd

Original Assignee

Fujitsu Ltd

Priority date (The priority date 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 date listed.)

1987-07-15

Filing date

1988-07-15

Publication date

1994-03-24

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26405394&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3887786(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1987-07-15 Priority claimed from JP62177679A external-priority patent/JPH06101760B2/ja

1988-03-17 Priority claimed from JP6427188A external-priority patent/JPH01236807A/ja

1988-07-15 Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd

1994-03-24 Application granted granted Critical

1994-03-24 Publication of DE3887786D1 publication Critical patent/DE3887786D1/de

1994-07-07 Publication of DE3887786T2 publication Critical patent/DE3887786T2/de

2008-07-16 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

Classifications

- 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
- H04M9/085—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 digital techniques

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Control Of Amplification And Gain Control (AREA)
Telephone Set Structure (AREA)

DE3887786T 1987-07-15 1988-07-15 Elektronisches Fernmeldegerät mit Rauschunterdrückungsfunktion. Expired - Fee Related DE3887786T2 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP62177679A JPH06101760B2 (ja)	1987-07-15	1987-07-15	電話端末
JP6427188A JPH01236807A (ja)	1988-03-17	1988-03-17	騒音抑圧増幅器

Publications (2)

Publication Number	Publication Date
DE3887786D1 true DE3887786D1 (de)	1994-03-24
DE3887786T2 DE3887786T2 (de)	1994-07-07

Family

ID=26405394

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE3887786T Expired - Fee Related DE3887786T2 (de)	1987-07-15	1988-07-15	Elektronisches Fernmeldegerät mit Rauschunterdrückungsfunktion.

Country Status (5)

Country	Link
US (1)	US4908855A (de)
EP (1)	EP0299507B1 (de)
AU (1)	AU601861B2 (de)
CA (1)	CA1291837C (de)
DE (1)	DE3887786T2 (de)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AU634510B2 (en) *	1989-01-26	1993-02-25	Plantronics, Inc.	Voice communication link interface apparatus
US5235637A (en) *	1989-01-26	1993-08-10	Plantronics, Inc.	Voice communication link interface
US5125026A (en) *	1989-12-21	1992-06-23	H & K Devices, Inc.	Internal telephone intercom system
DE4012175C2 (de) *	1990-04-14	1995-04-13	Telefunken Microelectron	Freisprecheinrichtung
US5239578A (en) *	1990-05-15	1993-08-24	Plantronics, Inc.	Noise cancelling apparatus for a telephone handset
DE69220255T2 (de) *	1991-01-18	1997-11-20	Nec Corp	Schaltung zur Unterdrückung von weissem Rauschen
JP3076072B2 (ja) *	1991-02-19	2000-08-14	日本電気株式会社	拡声電話装置および該装置に用いる騒音抑圧回路
US5202918A (en) *	1991-05-21	1993-04-13	Maxcom Electronics, Inc.	Duplex transducer for simultaneous voice broadcast and reception
WO1992021198A1 (en) *	1991-05-21	1992-11-26	Maxcom Electronics, Inc.	Duplex transducer for simultaneous voice broadcast and reception
DE4130045A1 (de) *	1991-09-10	1993-03-18	Standard Elektrik Lorenz Ag	Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes
US5732143A (en) *	1992-10-29	1998-03-24	Andrea Electronics Corp.	Noise cancellation apparatus
US5625684A (en) *	1993-02-04	1997-04-29	Local Silence, Inc.	Active noise suppression system for telephone handsets and method
JP2576690B2 (ja) *	1993-03-11	1997-01-29	日本電気株式会社	ディジタル携帯電話機
FI108830B (fi) *	1993-12-23	2002-03-28	Nokia Corp	Menetelmä ja laite kaiun vaimentamiseksi puhelinlaitteessa
US5526419A (en) *	1993-12-29	1996-06-11	At&T Corp.	Background noise compensation in a telephone set
US5485515A (en) *	1993-12-29	1996-01-16	At&T Corp.	Background noise compensation in a telephone network
JPH0823373A (ja) *	1994-07-08	1996-01-23	Kokusai Electric Co Ltd	通話器回路
JP2606171B2 (ja) *	1994-12-12	1997-04-30	日本電気株式会社	受話音量自動可変回路
US5615412A (en) *	1995-07-31	1997-03-25	Motorola, Inc.	Digital squelch tail system and method for same
US6744882B1 (en)	1996-07-23	2004-06-01	Qualcomm Inc.	Method and apparatus for automatically adjusting speaker and microphone gains within a mobile telephone
JPH10304030A (ja)	1997-04-28	1998-11-13	Saitama Nippon Denki Kk	携帯電話装置
GB2340334B (en)	1998-07-29	2003-06-25	Ericsson Telefon Ab L M	Telephone apparatus
US6347147B1 (en) *	1998-12-07	2002-02-12	The United States Of America As Represented By The Sceretary Of The Navy	High noise suppression microphone
US6363345B1 (en)	1999-02-18	2002-03-26	Andrea Electronics Corporation	System, method and apparatus for cancelling noise
US6594367B1 (en)	1999-10-25	2003-07-15	Andrea Electronics Corporation	Super directional beamforming design and implementation
US20020013519A1 (en) *	2000-06-14	2002-01-31	Scott Adams	Secure test and test result delivery system
US7130705B2 (en) *	2001-01-08	2006-10-31	International Business Machines Corporation	System and method for microphone gain adjust based on speaker orientation
WO2006099708A1 (en) *	2005-03-23	2006-09-28	AVERBUG, André	Communication system for use in public transportation vehicles

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3410958A (en) *	1965-03-25	1968-11-12	Executone Inf Sys Inc	Noise controlled sound reproducing system
US3588360A (en) *	1969-02-03	1971-06-28	Post Office	Telecommunication systems
CA976677A (en) *	1973-03-12	1975-10-21	Northern Electric Company	Loudspeaking communication terminal apparatus and method of operation
JPS5154703A (de) *	1974-11-08	1976-05-14	Oki Electric Ind Co Ltd
JPS5797262A (en) *	1980-12-09	1982-06-16	Nippon Telegr & Teleph Corp <Ntt>	Loud speaker telephone set system
JPS59117849A (ja) *	1982-12-24	1984-07-07	Nippon Telegr & Teleph Corp <Ntt>	電話機における防騒音回路
GB8317706D0 (en) *	1983-06-29	1983-08-03	Standard Telephones Cables Ltd	Telephone subsets
GB2161047B (en) *	1984-06-28	1987-09-16	Stc Plc	Improvements in telephone instruments
US4696032A (en) *	1985-02-26	1987-09-22	Siemens Corporate Research & Support, Inc.	Voice switched gain system
DE3629596A1 (de) *	1986-08-30	1988-03-03	Standard Elektrik Lorenz Ag	Schaltungsanordnung zur entkopplung der uebertragungszweige einer freisprecheinrichtung

1988
- 1988-07-13 CA CA000571870A patent/CA1291837C/en not_active Expired - Lifetime
- 1988-07-15 AU AU19078/88A patent/AU601861B2/en not_active Ceased
- 1988-07-15 US US07/219,607 patent/US4908855A/en not_active Expired - Fee Related
- 1988-07-15 DE DE3887786T patent/DE3887786T2/de not_active Expired - Fee Related
- 1988-07-15 EP EP88111401A patent/EP0299507B1/de not_active Expired - Lifetime

Also Published As

Publication number	Publication date
DE3887786T2 (de)	1994-07-07
EP0299507A3 (en)	1989-06-07
AU601861B2 (en)	1990-09-20
EP0299507B1 (de)	1994-02-16
CA1291837C (en)	1991-11-05
EP0299507A2 (de)	1989-01-18
US4908855A (en)	1990-03-13
AU1907888A (en)	1989-02-23

Legal Events

Date	Code	Title	Description
1995-02-23	8363	Opposition against the patent
1998-07-09	8339	Ceased/non-payment of the annual fee

Publication	Publication Date	Title
DE3887786T2 (de)	1994-07-07	Elektronisches Fernmeldegerät mit Rauschunterdrückungsfunktion.
IT1229936B (it)	1991-09-16	Emporio elettronico.
DE3776209D1 (de)	1992-03-05	Rauschunterdrueckungsschaltung.
DE3685474D1 (de)	1992-07-02	Adaptive rauschunterdrueckungseinrichtung.
DE68919741D1 (de)	1995-01-19	Elektronisches Filter.
DE3770461D1 (de)	1991-07-04	Elektronisches neigungsmessgeraet.
DE3881422D1 (de)	1993-07-08	Fernsprechvorrichtung mit mehreren funktionen.
DE69110934D1 (de)	1995-08-10	Rauschreduktionsschaltung.
DE3850025T2 (de)	1994-12-01	Fahrzeugfernsprechgerät.
NO885715D0 (no)	1988-12-22	Telefonnummeranordning.
DE3778212D1 (de)	1992-05-21	Elektronisches handetikettiergeraet.
DE3781601D1 (de)	1992-10-15	Elektronisches handetikettiergeraet.
DE58909167D1 (de)	1995-05-11	Elektronisches gerät.
DE68912198T2 (de)	1994-08-18	Fernsprechschnittstellenschaltung.
DE3886513D1 (de)	1994-02-03	Fernsprechschnittstellenschaltung.
DE3869287D1 (de)	1992-04-23	Elektronisches geraet mit kalenderfunktion.
DE58905914D1 (de)	1993-11-18	Elektronisches gerät.
DE69014970D1 (de)	1995-01-26	Elektronischer Fernsprechapparat.
DE3862970D1 (de)	1991-07-04	Elektronenbuendelvorrichtung.
DE68914417T2 (de)	1994-10-13	Elektronischer Fernsprechapparat.
DE3860246D1 (de)	1990-07-26	Montagevorrichtung.
FI885753A (fi)	1988-12-12	Identitetstickpropp foer elektroniska moduler.
FI882877A0 (fi)	1988-06-16	Elektronisk tidsstyrning foer motor-oavhaengiga fordonsvaermare.
DE3873816T2 (de)	1993-04-01	Integrierte wirksame lastschaltung mit niedrigem geraeusch.
ES1015392Y (es)	1992-01-01	Interruptor-regulador electronico.