HK84597A - Hands-free telephone - Google Patents
Hands-free telephoneInfo
- Publication number
- HK84597A HK84597A HK84597A HK84597A HK84597A HK 84597 A HK84597 A HK 84597A HK 84597 A HK84597 A HK 84597A HK 84597 A HK84597 A HK 84597A HK 84597 A HK84597 A HK 84597A
- Authority
- HK
- Hong Kong
- Prior art keywords
- hands
- free telephone
- telephone
- free
- Prior art date
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
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3390288 | 1988-02-18 | ||
JP63252046A JP2751244B2 (ja) | 1988-02-18 | 1988-10-07 | ハンズフリー回路及びハンズフリー制御方式 |
Publications (1)
Publication Number | Publication Date |
---|---|
HK84597A true HK84597A (en) | 1997-06-27 |
Family
ID=26372678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK84597A HK84597A (en) | 1988-02-18 | 1997-06-19 | Hands-free telephone |
Country Status (6)
Country | Link |
---|---|
US (2) | US4982425A (fr) |
EP (1) | EP0330384B1 (fr) |
JP (1) | JP2751244B2 (fr) |
CA (1) | CA1308441C (fr) |
DE (1) | DE68910346D1 (fr) |
HK (1) | HK84597A (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5172408A (en) * | 1990-08-01 | 1992-12-15 | At&T Bell Laboratories | Speakerphone state-controlled alerting arrangement |
JP2634946B2 (ja) * | 1990-11-19 | 1997-07-30 | 日本電気株式会社 | ハンズフリー補助回路 |
JPH04323938A (ja) * | 1991-04-23 | 1992-11-13 | Toshiba Corp | ハンズフリー回路 |
JPH04363918A (ja) * | 1991-06-11 | 1992-12-16 | Toshiba Corp | 電話装置 |
US5271057A (en) * | 1991-10-09 | 1993-12-14 | Bell Communications Research, Inc. | Audio processing system for teleconferencing system |
JP2894881B2 (ja) * | 1991-10-28 | 1999-05-24 | 日本電気株式会社 | 無線拡声電話装置 |
JP4203122B2 (ja) * | 1991-12-31 | 2008-12-24 | ユニシス・パルスポイント・コミュニケーションズ | 音声制御通信装置および処理方法 |
US5230089A (en) * | 1992-02-03 | 1993-07-20 | Motorola | Automated voice operated transmitter control |
WO1993017750A1 (fr) * | 1992-02-28 | 1993-09-16 | Scimed Life Systems, Inc. | Catheter intravasculaire et procede d'utilisation |
US5297183A (en) * | 1992-04-13 | 1994-03-22 | Vcs Industries, Inc. | Speech recognition system for electronic switches in a cellular telephone or personal communication network |
US5365583A (en) * | 1992-07-02 | 1994-11-15 | Polycom, Inc. | Method for fail-safe operation in a speaker phone system |
JPH06216986A (ja) * | 1993-01-19 | 1994-08-05 | Mitsubishi Electric Corp | ハンズフリー通話回路 |
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 |
US5434912A (en) * | 1993-08-11 | 1995-07-18 | Bell Communications Research, Inc. | Audio processing system for point-to-point and multipoint teleconferencing |
GB2281680B (en) * | 1993-08-27 | 1998-08-26 | Motorola Inc | A voice activity detector for an echo suppressor and an echo suppressor |
US5838787A (en) * | 1996-06-27 | 1998-11-17 | Northern Telecom Limited | Method and system for controlling echo return loss using a complementary variolosses in transmit path |
US5963877A (en) * | 1997-01-30 | 1999-10-05 | Sony Corporation | Telephone call receiver indicator |
JP3220979B2 (ja) * | 1998-01-09 | 2001-10-22 | 日本電気株式会社 | 音声スイッチ |
DE10120525A1 (de) | 2001-04-26 | 2002-11-07 | Harman Audio Electronic Sys | Schaltungsanordnung zur Audiowiedergabe und zum Freisprechen in einem Kraftfahrzeug |
US20060136201A1 (en) * | 2004-12-22 | 2006-06-22 | Motorola, Inc. | Hands-free push-to-talk radio |
US7792136B2 (en) * | 2007-01-31 | 2010-09-07 | Harris Corporation | Carrier sense multiple access (CSMA) for non-packetized wireless digital voice networks using intelligent conversation boundary detection |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1029163A (en) * | 1964-05-29 | 1966-05-11 | Standard Telephones Cables Ltd | Improvements in or relating to telephone sets |
US3894187A (en) * | 1973-10-31 | 1975-07-08 | Tokyo Shibaura Electric Co | Circuit for comparing at least two input signals to generate control signals |
US3970786A (en) * | 1974-06-27 | 1976-07-20 | Stromberg-Carlson Corporation | Loudspeaking telephone with improved receive sensitivity |
JPS5229566A (en) * | 1975-08-31 | 1977-03-05 | Showa Electric Wire & Cable Co Ltd | Manufacturing process of elastic clasp |
US4308427A (en) * | 1979-09-06 | 1981-12-29 | Southwest Utilities, Inc. | Hands-free talk-back intercommunication system |
JPS5787656A (en) * | 1980-11-21 | 1982-06-01 | Nippon Telegr & Teleph Corp <Ntt> | Loudspeaker transmitting system |
JPS5797262A (en) * | 1980-12-09 | 1982-06-16 | Nippon Telegr & Teleph Corp <Ntt> | Loud speaker telephone set system |
JPS5880937A (ja) * | 1981-11-06 | 1983-05-16 | Matsushita Electric Ind Co Ltd | 音声スイツチ通話装置 |
US4400584A (en) * | 1982-04-05 | 1983-08-23 | Motorola, Inc. | Speakerphone for radio and, landline telephones |
GB2122851B (en) * | 1982-06-10 | 1986-03-19 | Standard Telephones Cables Ltd | Loudspeaking telephones |
JPS596655A (ja) * | 1982-07-02 | 1984-01-13 | Toa Tokushu Denki Kk | 電話機 |
JPS5962259A (ja) * | 1982-10-01 | 1984-04-09 | Matsushita Electric Ind Co Ltd | 音声スイツチ装置 |
FR2571191B1 (fr) * | 1984-10-02 | 1986-12-26 | Renault | Systeme de radiotelephone, notamment pour vehicule automobile |
JPH063950B2 (ja) * | 1985-02-28 | 1994-01-12 | 株式会社東芝 | 拡声電話装置 |
JPS61205029A (ja) * | 1985-03-08 | 1986-09-11 | Nec Corp | 無線電話装置 |
US4737976A (en) * | 1985-09-03 | 1988-04-12 | Motorola, Inc. | Hands-free control system for a radiotelephone |
US4724540A (en) * | 1986-09-02 | 1988-02-09 | Motorola, Inc. | Speakerphone with fast idle mode |
GB2197166A (en) * | 1986-11-07 | 1988-05-11 | Storno As | Controlling gain in speech-controlled telephones |
-
1988
- 1988-10-07 JP JP63252046A patent/JP2751244B2/ja not_active Expired - Fee Related
-
1989
- 1989-02-17 CA CA000591453A patent/CA1308441C/fr not_active Expired - Fee Related
- 1989-02-17 DE DE89301554T patent/DE68910346D1/de not_active Expired - Lifetime
- 1989-02-17 EP EP89301554A patent/EP0330384B1/fr not_active Expired - Lifetime
- 1989-02-21 US US07/313,209 patent/US4982425A/en not_active Expired - Lifetime
- 1989-10-05 US US07/417,617 patent/US5054061A/en not_active Expired - Lifetime
-
1997
- 1997-06-19 HK HK84597A patent/HK84597A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CA1308441C (fr) | 1992-10-06 |
EP0330384B1 (fr) | 1993-11-03 |
EP0330384A3 (en) | 1990-06-13 |
US4982425A (en) | 1991-01-01 |
US5054061A (en) | 1991-10-01 |
DE68910346D1 (de) | 1993-12-09 |
JPH01295554A (ja) | 1989-11-29 |
JP2751244B2 (ja) | 1998-05-18 |
EP0330384A2 (fr) | 1989-08-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20070217 |