CA1244168A - Haut-parleur pour radio-telephones et telephones a ligne terrestre - Google Patents

Haut-parleur pour radio-telephones et telephones a ligne terrestre

Info

Publication number: CA1244168A
Authority: CA; Canada
Prior art keywords: gain; audio signals; detector; microphone; control signal
Prior art date: 1985-08-20
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

Application number

CA000512634A

Other languages

English (en)

Inventor

Richard J. Vilmur

Kenneth R. Haddad

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.)

Motorola Solutions Inc

Original Assignee

Motorola Inc

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.)

1985-08-20

Filing date

1986-06-27

Publication date

1988-11-01

1986-06-27 Application filed by Motorola Inc filed Critical Motorola Inc

1988-11-01 Application granted granted Critical

1988-11-01 Publication of CA1244168A publication Critical patent/CA1244168A/fr

Status Expired legal-status Critical Current

Links

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AAEVYOVXGOFMJO-UHFFFAOYSA-N prometryn Chemical compound CSC1=NC(NC(C)C)=NC(NC(C)C)=N1 AAEVYOVXGOFMJO-UHFFFAOYSA-N 0.000 description 1
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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

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Mobile Radio Communication Systems (AREA)

CA000512634A 1985-08-20 1986-06-27 Haut-parleur pour radio-telephones et telephones a ligne terrestre Expired CA1244168A (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US76754385A	1985-08-20	1985-08-20
US767.543		1985-08-20

Publications (1)

Publication Number	Publication Date
CA1244168A true CA1244168A (fr)	1988-11-01

Family

ID=25079807

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA000512634A Expired CA1244168A (fr)	1985-08-20	1986-06-27	Haut-parleur pour radio-telephones et telephones a ligne terrestre

Country Status (3)

Country	Link
EP (1)	EP0233216A1 (fr)
CA (1)	CA1244168A (fr)
WO (1)	WO1987001255A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4724540A (en) *	1986-09-02	1988-02-09	Motorola, Inc.	Speakerphone with fast idle mode
US4843621A (en) *	1987-04-24	1989-06-27	Motorola, Inc.	Speakerphone using digitally compressed audio to detect acoustic feedback
DE3734446A1 (de) *	1987-10-12	1989-06-15	Telefonbau & Normalzeit Gmbh	Verfahren und schaltungsanordnung zur stoergeraeuschkompensation fuer ein mikrofon
CA2021793C (fr) *	1989-07-24	1994-10-04	Yukio Murata	Telephone mains-libres
US5212722A (en) *	1989-07-24	1993-05-18	Nec Corporation	Hands-free telephone having a handset volume attenuator for controlling speaker volume in a hands-free adaptor
JPH06338934A (ja) *	1993-05-25	1994-12-06	Exar Corp	事象駆動型制御回路を有するスピーカーホーン
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
DE4447028C1 (de) *	1994-12-29	1996-03-28	Siemens Ag	Freisprecheinrichtung für ein digitales Kommunikationsendgerät
US6766176B1 (en)	1996-07-23	2004-07-20	Qualcomm Incorporated	Method and apparatus for automatically adjusting speaker and microphone gains within a mobile telephone
AU3812497A (en) *	1997-07-24	1999-02-16	Qualcomm Incorporated	Method and apparatus for automatically adjusting speaker and microphone gains within a mobile telephone
GB0021974D0 (en) *	2000-09-07	2000-10-25	Simoco Int Ltd	Echo reduction in two-way communication
RU2237976C2 (ru) *	2000-11-27	2004-10-10	Механошин Андрей Павлович	Система двухпроводного вещания с оповещением

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3751602A (en) *	1971-08-13	1973-08-07	Bell Telephone Labor Inc	Loudspeaking telephone
US3962553A (en) *	1973-03-29	1976-06-08	Motorola, Inc.	Portable telephone system having a battery saver feature
JPS5242643B2 (fr) *	1973-10-18	1977-10-26
JPS5411203B2 (fr) *	1974-05-02	1979-05-12
JPS5797262A (en) *	1980-12-09	1982-06-16	Nippon Telegr & Teleph Corp <Ntt>	Loud speaker telephone set system
US4378603A (en) *	1980-12-23	1983-03-29	Motorola, Inc.	Radiotelephone with hands-free operation
US4400584A (en) *	1982-04-05	1983-08-23	Motorola, Inc.	Speakerphone for radio and, landline telephones

1986
- 1986-06-26 WO PCT/US1986/001383 patent/WO1987001255A1/fr not_active Ceased
- 1986-06-26 EP EP19860904594 patent/EP0233216A1/fr active Pending
- 1986-06-27 CA CA000512634A patent/CA1244168A/fr not_active Expired

Also Published As

Publication number	Publication date
WO1987001255A1 (fr)	1987-02-26
EP0233216A1 (fr)	1987-08-26

Legal Events

Date	Code	Title	Description
2006-06-27	MKEX	Expiry

Publication	Publication Date	Title
US4715063A (en)	1987-12-22	Speakerphone for radio and landline telephones
US4378603A (en)	1983-03-29	Radiotelephone with hands-free operation
US4400584A (en)	1983-08-23	Speakerphone for radio and, landline telephones
EP0288078B1 (fr)	1995-01-04	Téléphone à haut-parleur utilisant un signal audio compressé numériquement pour contrôler le gain de la voie parole
CA1287887C (fr)	1991-08-20	Telephone a haut-parleur a detection de la reaction acoustique au moyend'un signal audio-comprime numeriquement
FI88570B (fi)	1993-02-15	Telefonkrets som laemnar haenderna fria
KR920006547B1 (ko)	1992-08-08	전화 스테이션
CA1244168A (fr)	1988-11-01	Haut-parleur pour radio-telephones et telephones a ligne terrestre
US6154639A (en)	2000-11-28	Handsfree unit
KR880001016B1 (ko)	1988-06-13	핸드프리(hand free)작동의 무선전화기
JPH0630090A (ja)	1994-02-04	音量制御機能付き電話機
KR100304531B1 (ko)	2001-11-22	핸드프리전화기자동응답장치
KR0134454B1 (ko)	1998-04-27	음량 보정 기능을 갖는 휴대용 전화기
HK13890A (en)	1990-03-02	Radiotelephone with hands-free operation
KR940000954Y1 (ko)	1994-02-25	무선전화기 베이스유니트의 인터컴 음성 송수신회로
JPH0748771B2 (ja)	1995-05-24	拡声電話機
KR200254448Y1 (ko)	2001-12-01	전화기 음량 조절 장치
JP3500832B2 (ja)	2004-02-23	コードレス親機
KR100189412B1 (ko)	1999-06-01	디지탈 스피커 폰 회로
JPH0540601Y2 (fr)	1993-10-14
JPS6196854A (ja)	1986-05-15	送受切換装置
JPS6248162A (ja)	1987-03-02	ハンズフリ−電話器
JPS637062A (ja)	1988-01-12	ボタン電話装置
JPH0560293B2 (fr)	1993-09-02
JPH08307173A (ja)	1996-11-22	コンパンダ回路及び無線電話装置