BR8008932A - Receptor de tons de frequencia multipla programavel - Google Patents

Receptor de tons de frequencia multipla programavel

Info

Publication number
BR8008932A
BR8008932A BR8008932A BR8008932A BR8008932A BR 8008932 A BR8008932 A BR 8008932A BR 8008932 A BR8008932 A BR 8008932A BR 8008932 A BR8008932 A BR 8008932A BR 8008932 A BR8008932 A BR 8008932A
Authority
BR
Brazil
Prior art keywords
multiple frequency
frequency tone
tone receiver
programmable multiple
programmable
Prior art date
Application number
BR8008932A
Other languages
English (en)
Inventor
D Conger
I Gerson
R White
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 BR8008932A publication Critical patent/BR8008932A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Complex Calculations (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Filters That Use Time-Delay Elements (AREA)
BR8008932A 1979-11-28 1980-11-19 Receptor de tons de frequencia multipla programavel BR8008932A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/098,093 US4354248A (en) 1979-11-28 1979-11-28 Programmable multifrequency tone receiver
PCT/US1980/001556 WO1981001623A1 (en) 1979-11-28 1980-11-19 Programmable multifrequency tone receiver

Publications (1)

Publication Number Publication Date
BR8008932A true BR8008932A (pt) 1981-10-20

Family

ID=22267003

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8008932A BR8008932A (pt) 1979-11-28 1980-11-19 Receptor de tons de frequencia multipla programavel

Country Status (6)

Country Link
US (1) US4354248A (pt)
EP (1) EP0041536B1 (pt)
BR (1) BR8008932A (pt)
CA (1) CA1150783A (pt)
DE (1) DE3071374D1 (pt)
WO (1) WO1981001623A1 (pt)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485843B1 (fr) * 1980-06-25 1986-11-07 Cit Alcatel Recepteur numerique de frequences
FR2512306A1 (fr) * 1981-08-27 1983-03-04 Telecommunications Sa Dispositif numerique de reconnaissance de frequences
US4399536A (en) * 1981-10-02 1983-08-16 Bell Telephone Laboratories, Incorporated Convolution filter arrangement for digital multifrequency receiver
US4534041A (en) * 1982-02-12 1985-08-06 Northern Telecom Limited Digital circuit for determining the envelope frequency of PCM encoded call progress tones in a telephone system
ATE24812T1 (de) * 1982-06-25 1987-01-15 Ibm Tondetektor und mehrfrequenzempfaenger mit diesem detektor.
US4455617A (en) * 1982-08-30 1984-06-19 Motorola, Inc. Multiple simultaneous tone decoder
US4502049A (en) * 1982-08-30 1985-02-26 Itec, Inc. Universal signalling tone receiver
US4538273A (en) * 1982-11-12 1985-08-27 Honeywell Inc. Dual input watchdog timer
GB2155649B (en) * 1984-02-06 1988-11-09 Konishiroku Photo Ind Camera
US4818989A (en) * 1984-03-27 1989-04-04 Rockwell International Corporation Selective calling decoder
US4689760A (en) * 1984-11-09 1987-08-25 Digital Sound Corporation Digital tone decoder and method of decoding tones using linear prediction coding
CH672968A5 (pt) * 1984-11-30 1990-01-15 Autophon Ascom Ag
US4617427A (en) * 1985-02-13 1986-10-14 Northern Telecom Limited Square root circuit
US4709344A (en) * 1985-10-02 1987-11-24 Motorola, Inc. Programmable multifrequency digital tone receiver
JPS62204652A (ja) * 1986-03-04 1987-09-09 Nec Corp 可聴周波信号識別方式
US4766561A (en) * 1986-06-26 1988-08-23 Motorola, Inc. Method and apparatus for implementing multiple filters with shared components
JP2982875B2 (ja) * 1987-12-28 1999-11-29 株式会社日立製作所 スレーブ制御装置
US5144626A (en) * 1988-02-19 1992-09-01 Hitachi, Ltd. Data processor
US5193090A (en) * 1988-07-15 1993-03-09 Janusz Filipiak Access protection and priority control in distributed queueing
US4941117A (en) * 1988-09-07 1990-07-10 General Electric Company Multiple channel adaptive correlation/decorrelation processor
EP0440028A3 (en) * 1990-01-29 1992-07-22 Dialogic Corporation Multifrequency tone signal detector
JP2775651B2 (ja) * 1990-05-14 1998-07-16 カシオ計算機株式会社 音階検出装置及びそれを用いた電子楽器
US5163050A (en) * 1991-01-23 1992-11-10 Digital Sound Corporation Configurable parameter dtmf detector
US5189634A (en) * 1991-03-28 1993-02-23 Northern Telecom Limited Digital signal processing apparatus for detecting a frequency component of digital signals
US5245565A (en) * 1991-07-31 1993-09-14 International Microelectronic Products Digitally programmable linear phase filter having phase equalization
EP0548438A1 (en) * 1991-12-20 1993-06-30 International Business Machines Corporation A method for detecting dual tone multi-frequency signals and device for implementing said method
US5442696A (en) * 1991-12-31 1995-08-15 At&T Corp. Method and apparatus for detecting control signals
US5319703A (en) * 1992-05-26 1994-06-07 Vmx, Inc. Apparatus and method for identifying speech and call-progression signals
EP0579927A2 (en) * 1992-06-24 1994-01-26 Siemens Rolm Communications Inc. (a Delaware corp.) DTMF signal detection for voice processing equipment
US5459784A (en) * 1992-09-28 1995-10-17 Comsat Corporation Dual-tone multifrequency (DTMF) signalling transparency for low-data-rate vocoders
FR2720577B1 (fr) * 1994-05-27 1996-08-14 Sgs Thomson Microelectronics Circuit de détection de tonalité téléphonique.
GB2306723A (en) * 1995-10-31 1997-05-07 Advanced Tech Uk Ltd Data communication
US5910906A (en) * 1996-07-25 1999-06-08 Northern Telecom Limited Digital single-frequency tone detection in presence of aliases
WO1999029085A2 (en) * 1997-11-27 1999-06-10 Northern Telecom Limited Method and apparatus for detecting tones

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1603175A (pt) * 1968-07-30 1971-03-22
US3689844A (en) * 1969-12-11 1972-09-05 Bell Telephone Labor Inc Digital filter receiver for frequency-shift data signals
FR2116224B1 (pt) * 1970-10-29 1974-10-31 Ibm France
US3665171A (en) * 1970-12-14 1972-05-23 Bell Telephone Labor Inc Nonrecursive digital filter apparatus employing delayedadd configuration
FR2118410A5 (pt) * 1970-12-17 1972-07-28 Ibm France
US3706076A (en) * 1970-12-21 1972-12-12 Bell Telephone Labor Inc Programmable digital filter apparatus
US4044241A (en) * 1972-01-12 1977-08-23 Esl Incorporated Adaptive matched digital filter
US3863030A (en) * 1972-06-01 1975-01-28 Gte Automatic Electric Lab Inc Pcm tone receiver using digital spectrum analysis
US3824471A (en) * 1972-12-01 1974-07-16 Gte Automatic Electric Lab Inc Pcm tone receiver using floating-point digital spectrum analysis
US3798560A (en) * 1973-01-29 1974-03-19 Bell Telephone Labor Inc Adaptive transversal equalizer using a time-multiplexed second-order digital filter
US3961167A (en) * 1974-07-22 1976-06-01 Gte Automatic Electric Laboratories Incorporated PCM tone receiver using optimum statistical technique
NL173807C (nl) * 1974-12-18 1983-10-03 Philips Nv Niet-recursief, digitaal filter met verlaagde uitgangsbemonsterfrequentie.
FR2299769A1 (fr) * 1975-01-31 1976-08-27 Telecommunications Sa Procede d'application
NL7506141A (nl) * 1975-05-26 1976-11-30 Philips Nv Digitaal filter.
US4101964A (en) * 1976-01-08 1978-07-18 The United States Of America As Represented By The Secretary Of The Army Digital filter for pulse code modulation signals
GB1562121A (en) * 1976-11-26 1980-03-05 Nippon Electric Co Tone signal detecting circuits
US4093989A (en) * 1976-12-03 1978-06-06 Rockland Systems Corporation Spectrum analyzer using digital filters
JPS5376726A (en) * 1976-12-20 1978-07-07 Toshiba Corp Synchronizing system digital filter
FR2379946A1 (fr) * 1977-02-04 1978-09-01 Labo Cent Telecommunicat Filtre numerique
JPS6016582B2 (ja) * 1977-03-04 1985-04-26 日本電気株式会社 デイジタル周波数分析装置
JPS54554A (en) * 1977-06-03 1979-01-05 Hitachi Ltd Digital filter
US4125900A (en) * 1977-07-01 1978-11-14 Ncr Corporation Cascaded recursive digital filter
US4213187A (en) * 1978-12-14 1980-07-15 Bell Telephone Laboratories, Incorporated Digital filters with control of limit cycles
US4203008A (en) * 1979-02-26 1980-05-13 Northern Telecom Limited Digital signalling receiver for receiving PCM tones

Also Published As

Publication number Publication date
EP0041536A4 (en) 1982-03-22
EP0041536A1 (en) 1981-12-16
EP0041536B1 (en) 1986-01-22
CA1150783A (en) 1983-07-26
US4354248A (en) 1982-10-12
DE3071374D1 (en) 1986-03-06
WO1981001623A1 (en) 1981-06-11

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Legal Events

Date Code Title Description
MK Patent expired

Effective date: 19951119

B15K Others concerning applications: alteration of classification

Ipc: H04Q 1/457 (2006.01), H04L 27/30 (2006.0