DK344182A - Radiotelefon med haandfri drift - Google Patents

Radiotelefon med haandfri drift

Info

Publication number
DK344182A
DK344182A DK344182A DK344182A DK344182A DK 344182 A DK344182 A DK 344182A DK 344182 A DK344182 A DK 344182A DK 344182 A DK344182 A DK 344182A DK 344182 A DK344182 A DK 344182A
Authority
DK
Denmark
Prior art keywords
audio signals
detector
signal path
audio
control circuit
Prior art date
Application number
DK344182A
Other languages
English (en)
Other versions
DK158693C (da
DK158693B (da
Inventor
B C Eastmond
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.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of DK344182A publication Critical patent/DK344182A/da
Publication of DK158693B publication Critical patent/DK158693B/da
Application granted granted Critical
Publication of DK158693C publication Critical patent/DK158693C/da

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
    • 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)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Telephone Function (AREA)
DK344182A 1980-12-23 1982-08-02 Radiotelefon med haandfri drift DK158693C (da)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US21976580 1980-12-23
US06/219,765 US4378603A (en) 1980-12-23 1980-12-23 Radiotelephone with hands-free operation
PCT/US1981/001521 WO1982002306A1 (en) 1980-12-23 1981-11-16 Radiotelephone with hands-free operation
US8101521 1981-11-16

Publications (3)

Publication Number Publication Date
DK344182A true DK344182A (da) 1982-08-02
DK158693B DK158693B (da) 1990-07-02
DK158693C DK158693C (da) 1991-02-25

Family

ID=22820685

Family Applications (1)

Application Number Title Priority Date Filing Date
DK344182A DK158693C (da) 1980-12-23 1982-08-02 Radiotelefon med haandfri drift

Country Status (12)

Country Link
US (1) US4378603A (da)
EP (1) EP0067173B1 (da)
JP (1) JPH0432576B2 (da)
AR (1) AR228168A1 (da)
AU (1) AU543431B2 (da)
BR (1) BR8108933A (da)
CA (1) CA1173910A (da)
DE (1) DE3176476D1 (da)
DK (1) DK158693C (da)
FI (1) FI75455C (da)
MX (1) MX150487A (da)
WO (1) WO1982002306A1 (da)

Families Citing this family (33)

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Publication number Priority date Publication date Assignee Title
US4400584A (en) * 1982-04-05 1983-08-23 Motorola, Inc. Speakerphone for radio and, landline telephones
GB2159375A (en) * 1984-05-19 1985-11-27 Advance Electronic Prod Interrupt on priority communication systems
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
US4630305A (en) * 1985-07-01 1986-12-16 Motorola, Inc. Automatic gain selector for a noise suppression system
US4628529A (en) * 1985-07-01 1986-12-09 Motorola, Inc. Noise suppression system
US4715063A (en) * 1985-08-20 1987-12-22 Motorola, Inc. Speakerphone for radio and landline telephones
EP0233216A1 (en) * 1985-08-20 1987-08-26 Motorola, Inc. Speakerphone for radio and landline telephones
WO1987001546A1 (en) * 1985-09-03 1987-03-12 Motorola, Inc. Hands-free control system for a radiotelephone
EP0255524B1 (en) * 1986-01-03 1993-07-21 Motorola, Inc. Method and apparatus for synthesizing speech without voicing or pitch information
DE3604292A1 (de) * 1986-02-12 1987-08-20 Comtronics Gmbh Einrichtung fuer die sprachgesteuerte uebertragung von audio-signalen ueber funk
US4843621A (en) * 1987-04-24 1989-06-27 Motorola, Inc. Speakerphone using digitally compressed audio to detect acoustic feedback
US4741018A (en) * 1987-04-24 1988-04-26 Motorola, Inc. Speakerphone using digitally compressed audio to control voice path gain
US4945570A (en) * 1987-10-02 1990-07-31 Motorola, Inc. Method for terminating a telephone call by voice command
DE4009900A1 (de) * 1990-03-20 1991-11-07 Blaupunkt Werke Gmbh Kraftfahrzeugkommunikationszentrale
JP3058923B2 (ja) * 1991-01-11 2000-07-04 株式会社東芝 無線電話装置アダプタ
JPH04239251A (ja) * 1991-01-11 1992-08-27 Toshiba Corp 無線電話装置アダプタ
US5444867A (en) * 1991-01-11 1995-08-22 Kabushiki Kaisha Toshiba Adapter unit for adaptively supplying a portable radio telephone with power
US5152007A (en) * 1991-04-23 1992-09-29 Motorola, Inc. Method and apparatus for detecting speech
DE69224680T2 (de) * 1991-05-29 1998-09-17 Koninkl Philips Electronics Nv Elektroakustische Verstärker-Anordnung und Mikrofonanordnung zur Verwendung in der elektroakustischen Verstärker-Anordnung
JPH04363918A (ja) * 1991-06-11 1992-12-16 Toshiba Corp 電話装置
AU633802B3 (en) * 1991-10-14 1993-02-04 Mark William Landon Lockable support
GB2271247B (en) * 1992-10-05 1997-02-19 Motorola Israel Ltd A radio telephone for a vehicle
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
US5754536A (en) * 1995-10-30 1998-05-19 Motorola, Inc. Digital speech interpolation method and apparatus
US6058319A (en) * 1997-03-05 2000-05-02 Ericsson, Inc. Cassette adapter for mobile telephones
JP3597671B2 (ja) * 1997-05-16 2004-12-08 三菱電機株式会社 ハンズフリー電話機
US6107960A (en) * 1998-01-20 2000-08-22 Snaptrack, Inc. Reducing cross-interference in a combined GPS receiver and communication system
EP0998166A1 (fr) * 1998-10-30 2000-05-03 Koninklijke Philips Electronics N.V. Dispositif de traitement audio récepteur et procédé pour filtrer un signal utile et le restituer en présence de bruit ambiant
KR100310342B1 (ko) 1999-07-21 2001-11-01 윤종용 휴대폰에서 스피커폰 모드시 송/수신 음성신호의 스위칭방법
US6745055B1 (en) * 2000-02-23 2004-06-01 Agere Systems Inc. Digital cordless telephone with speakerphone in a remote handset
DE10058786A1 (de) * 2000-11-27 2002-06-13 Philips Corp Intellectual Pty Verfahren zum Steuerung eines eine akustische Ausgabeeinrichtung aufweisenden Geräts
US6662027B2 (en) * 2001-03-16 2003-12-09 Motorola, Inc. Method of arbitrating speakerphone operation in a portable communication device for eliminating false arbitration due to echo
US7158764B2 (en) * 2001-12-13 2007-01-02 Electronic Data Systems Corporation System and method for sending high fidelity sound between wireless units

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US2269565A (en) * 1940-09-28 1942-01-13 Bell Telephone Labor Inc Communication system
US2589662A (en) * 1946-04-23 1952-03-18 Bell Telephone Labor Inc Radiotelephone receiving system
NL245570A (da) * 1958-12-29
US3387222A (en) * 1965-07-01 1968-06-04 Ibm Adaptive threshold signal detector with noise suppression
US3729682A (en) * 1971-08-02 1973-04-24 Gen Electric Audio signal quality indicating circuit
US3751602A (en) * 1971-08-13 1973-08-07 Bell Telephone Labor Inc Loudspeaking telephone
US3725585A (en) * 1972-03-21 1973-04-03 Itt Loudspeaking telephone station circuit
US3889059A (en) * 1973-03-26 1975-06-10 Northern Electric Co Loudspeaking communication terminal apparatus and method of operation
US3962553A (en) * 1973-03-29 1976-06-08 Motorola, Inc. Portable telephone system having a battery saver feature
US3906166A (en) * 1973-10-17 1975-09-16 Motorola Inc Radio telephone system
US3894187A (en) * 1973-10-31 1975-07-08 Tokyo Shibaura Electric Co Circuit for comparing at least two input signals to generate control signals
US3963868A (en) * 1974-06-27 1976-06-15 Stromberg-Carlson Corporation Loudspeaking telephone hysteresis and ambient noise control
US4037158A (en) * 1974-10-07 1977-07-19 Motorola, Inc. Two-way FM radio system operating on a single channel and providing simulated duplex operation
NO134477C (da) * 1974-10-29 1976-10-13 Manus Max
GB1508750A (en) * 1975-05-28 1978-04-26 Tani Denki Kogyo Kk Transmit-receive circuit changing switch system
US3984776A (en) * 1975-11-19 1976-10-05 Motorola, Inc. Signal quality detector
US4028627A (en) * 1975-12-29 1977-06-07 Motorola, Inc. Sample and hold valley detector
US4034299A (en) * 1975-12-29 1977-07-05 Motorola, Inc. Audio signal quality indicator
DE2638286C3 (de) * 1976-08-25 1979-03-01 Dasy Inter S.A., Genf (Schweiz) Schaltungsanordnung für ein Freisprechertelefon
US4178548A (en) * 1976-10-04 1979-12-11 Geraldine E. Thompson Voice actuated mobile radio
FR2410923A1 (fr) * 1977-08-18 1979-06-29 Dassault Electronique Installation de transmission telephonique de la parole entre des interlocuteurs places dans une ambiance bruyante
US4147892A (en) * 1978-01-30 1979-04-03 Tridar Speakerphone with dynamic level discriminator
JPS5923668B2 (ja) * 1979-03-26 1984-06-04 沖電気工業株式会社 音声制御方式
CA1134522A (en) * 1980-04-30 1982-10-26 James L.E. Thompson Voice switch for hands free communication apparatus

Also Published As

Publication number Publication date
JPH0432576B2 (da) 1992-05-29
JPS57502032A (da) 1982-11-11
AR228168A1 (es) 1983-01-31
EP0067173B1 (en) 1987-09-30
CA1173910A (en) 1984-09-04
FI822898L (fi) 1982-08-20
FI822898A0 (fi) 1982-08-20
AU7893981A (en) 1982-07-20
FI75455B (fi) 1988-02-29
DK158693C (da) 1991-02-25
EP0067173A1 (en) 1982-12-22
WO1982002306A1 (en) 1982-07-08
DE3176476D1 (en) 1987-11-05
MX150487A (es) 1984-05-14
BR8108933A (pt) 1982-11-30
DK158693B (da) 1990-07-02
EP0067173A4 (en) 1983-04-29
FI75455C (fi) 1988-06-09
US4378603A (en) 1983-03-29
AU543431B2 (en) 1985-04-18

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Legal Events

Date Code Title Description
PBP Patent lapsed