KR960009909B1 - 스피커폰 - Google Patents

스피커폰 Download PDF

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Publication number
KR960009909B1
KR960009909B1 KR1019870009632A KR870009632A KR960009909B1 KR 960009909 B1 KR960009909 B1 KR 960009909B1 KR 1019870009632 A KR1019870009632 A KR 1019870009632A KR 870009632 A KR870009632 A KR 870009632A KR 960009909 B1 KR960009909 B1 KR 960009909B1
Authority
KR
South Korea
Prior art keywords
output
signal
input
coupled
control circuit
Prior art date
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 - Lifetime
Application number
KR1019870009632A
Other languages
English (en)
Korean (ko)
Other versions
KR880004714A (ko
Inventor
데이비드 페이스 윌슨
리 웰리 데니스
Original Assignee
빈센트 죠셉로너
모토로라 인코포레이티드
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.)
Filing date
Publication date
Application filed by 빈센트 죠셉로너, 모토로라 인코포레이티드 filed Critical 빈센트 죠셉로너
Publication of KR880004714A publication Critical patent/KR880004714A/ko
Application granted granted Critical
Publication of KR960009909B1 publication Critical patent/KR960009909B1/ko
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
KR1019870009632A 1986-09-02 1987-09-01 스피커폰 Expired - Lifetime KR960009909B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US902920 1986-09-02
US06/902,920 US4724540A (en) 1986-09-02 1986-09-02 Speakerphone with fast idle mode

Publications (2)

Publication Number Publication Date
KR880004714A KR880004714A (ko) 1988-06-07
KR960009909B1 true KR960009909B1 (ko) 1996-07-24

Family

ID=25416623

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870009632A Expired - Lifetime KR960009909B1 (ko) 1986-09-02 1987-09-01 스피커폰

Country Status (6)

Country Link
US (1) US4724540A (enExample)
JP (1) JPS6363249A (enExample)
KR (1) KR960009909B1 (enExample)
GB (1) GB2194868B (enExample)
HK (1) HK37793A (enExample)
SG (1) SG122692G (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2751244B2 (ja) * 1988-02-18 1998-05-18 日本電気株式会社 ハンズフリー回路及びハンズフリー制御方式
DE4012175C2 (de) * 1990-04-14 1995-04-13 Telefunken Microelectron Freisprecheinrichtung
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
US5319704A (en) * 1993-06-17 1994-06-07 Exar Corporation Control circuit for voltage controlled attenuator for speakerphones
US5566238A (en) * 1993-11-24 1996-10-15 Intel Corporation Distributed processing of audio signals
US5631967A (en) * 1993-11-24 1997-05-20 Intel Corporation Processing audio signals using a state variable
US5592547A (en) * 1993-11-24 1997-01-07 Intel Corporation Processing audio signals using a discrete state machine
US5579389A (en) * 1993-11-24 1996-11-26 Intel Corporation Histogram-based processing of audio signals
US5692042A (en) * 1995-05-31 1997-11-25 Casio Phonemate, Inc. Speakerphone controlled by a comparator with hysteresis
WO1998016050A2 (en) * 1996-10-04 1998-04-16 Philips Electronics N.V. A telecommunications system, a subscriber unit, and a television set comprising a subscriber unit
JP3220979B2 (ja) * 1998-01-09 2001-10-22 日本電気株式会社 音声スイッチ
DE102008017231A1 (de) * 2008-04-04 2009-11-19 S. Siedle & Söhne Telefon- und Telegrafenwerke OHG Verfahren zum Betreiben einer Sende- und Empfangsvorrichtung und entsprechend ausgelegte Vorrichtung

Family Cites Families (13)

* 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
JPS5411203B2 (enExample) * 1974-05-02 1979-05-12
BR7608386A (pt) * 1976-01-23 1977-12-13 Int Standard Electric Corp Metodo de regulagem automatica de volume em um sistema de reproducao por altofalantes,tal como aparelhos telefonicos altofalantes controlados pela voz
DE2638286C3 (de) * 1976-08-25 1979-03-01 Dasy Inter S.A., Genf (Schweiz) Schaltungsanordnung für ein Freisprechertelefon
JPS5348602A (en) * 1976-10-16 1978-05-02 Oki Electric Ind Co Ltd Voice control system
JPS5368001A (en) * 1976-11-30 1978-06-17 Iriichi Tsuushin Kougiyou Kk Vodas controller
JPS53114305A (en) * 1977-03-16 1978-10-05 Nitsuko Ltd Loudspeaking telephone set
LU79026A1 (de) * 1977-11-16 1978-06-21 Dasy Int Sa Schaltungsanordnung fuer ein freisprechertelefon
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
GB2122851B (en) * 1982-06-10 1986-03-19 Standard Telephones Cables Ltd Loudspeaking telephones
US4490582A (en) * 1983-02-18 1984-12-25 At&T Information Systems Inc. Speakerphone control circuit
GB2161047B (en) * 1984-06-28 1987-09-16 Stc Plc Improvements in telephone instruments
WO1987001255A1 (en) * 1985-08-20 1987-02-26 Motorola, Inc. Speakerphone for radio and landline telephones

Also Published As

Publication number Publication date
JPH0450786B2 (enExample) 1992-08-17
US4724540A (en) 1988-02-09
SG122692G (en) 1993-02-19
GB2194868B (en) 1990-10-24
JPS6363249A (ja) 1988-03-19
HK37793A (en) 1993-04-30
GB2194868A (en) 1988-03-16
GB8717272D0 (en) 1987-08-26
KR880004714A (ko) 1988-06-07

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