FR2394213A1 - Dispositif pour la reconnaissance d'une frequence dans un signal code en mic - Google Patents

Dispositif pour la reconnaissance d'une frequence dans un signal code en mic

Info

Publication number
FR2394213A1
FR2394213A1 FR7717814A FR7717814A FR2394213A1 FR 2394213 A1 FR2394213 A1 FR 2394213A1 FR 7717814 A FR7717814 A FR 7717814A FR 7717814 A FR7717814 A FR 7717814A FR 2394213 A1 FR2394213 A1 FR 2394213A1
Authority
FR
France
Prior art keywords
frequency
signal
recognizing
code signal
pulses
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.)
Granted
Application number
FR7717814A
Other languages
English (en)
Other versions
FR2394213B1 (fr
Inventor
Jacques Luder
Luder Jacques
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7717814A priority Critical patent/FR2394213A1/fr
Priority to BE1008898A priority patent/BE867445A/fr
Priority to IT23972/78A priority patent/IT1094884B/it
Priority to DE2824565A priority patent/DE2824565A1/de
Priority to US05/913,163 priority patent/US4194092A/en
Priority to CA305,015A priority patent/CA1111588A/fr
Priority to SE7806681A priority patent/SE418136B/sv
Priority to NL7806252A priority patent/NL7806252A/xx
Priority to BR787803730A priority patent/BR7803730A/pt
Priority to GB7826645A priority patent/GB2000345B/en
Priority to DK259178A priority patent/DK259178A/da
Priority to LU79790A priority patent/LU79790A1/fr
Priority to IE1170/78A priority patent/IE46855B1/en
Priority to JP6901678A priority patent/JPS545321A/ja
Publication of FR2394213A1 publication Critical patent/FR2394213A1/fr
Application granted granted Critical
Publication of FR2394213B1 publication Critical patent/FR2394213B1/fr
Granted legal-status Critical Current

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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal
    • H04Q1/4485—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal which is transmitted in digital form

Abstract

L'invention se réfère à un dispositif de reconnaissance numérique d'une fréquence dans un signal MIC. Selon l'invention, on prévoit un compteur/décompteur qui reçoit a impulsions de comptage lorsque le signal à contrôler présente un changement de signe, et qui reçoit r impulsions de décomptage lorsque ce signal ne présente pas de changement de signe. Les nombres a et r sont déterminés en fonction du rapport entre la fréquence d'échantillonnage du signal MIC et la fréquence à reconnaître, de telle sorte que l'on puisse déduire la présence de cette fréquence d'un équilibre entre le nombre des impulsions de comptage et le nombre des impulsions de décomptage. Application : reconnaissance de la tonalité de neutralisation pour un suppresseur d'écho dans une ligne téléphonique MIC.
FR7717814A 1977-06-10 1977-06-10 Dispositif pour la reconnaissance d'une frequence dans un signal code en mic Granted FR2394213A1 (fr)

Priority Applications (14)

Application Number Priority Date Filing Date Title
FR7717814A FR2394213A1 (fr) 1977-06-10 1977-06-10 Dispositif pour la reconnaissance d'une frequence dans un signal code en mic
BE1008898A BE867445A (fr) 1977-06-10 1978-05-25 Dispositif pour la reconnaissance d'une frequence dans un signal code en mic
IT23972/78A IT1094884B (it) 1977-06-10 1978-05-30 Dispositivo per riconoscere una frequenza in un segnale codificato in mic
DE2824565A DE2824565A1 (de) 1977-06-10 1978-06-05 Schaltungsanordnung zum erkennen einer frequenz in einem pcm-signal
US05/913,163 US4194092A (en) 1977-06-10 1978-06-06 Device for detecting a frequency in a PCM coded signal
SE7806681A SE418136B (sv) 1977-06-10 1978-06-08 Anordning for detektering av en frekvens f?711 i en signal som foreligger i en pcm-kodad form
CA305,015A CA1111588A (fr) 1977-06-10 1978-06-08 Dispositif pour la reconnaissance d'une frequence dans un signal telephonique code en mic
NL7806252A NL7806252A (nl) 1977-06-10 1978-06-08 Inrichting voor het herkennen van een frekwentie in een mic gekodeerd signaal.
BR787803730A BR7803730A (pt) 1977-06-10 1978-06-09 Dispositivo para o reconhecimento de uma frequencia
GB7826645A GB2000345B (en) 1977-06-10 1978-06-09 A device for detecting a frequency in a pcm coded signal
DK259178A DK259178A (da) 1977-06-10 1978-06-09 Kobling til detektering af en frekvens der optraeder i et impulskodet signal
LU79790A LU79790A1 (fr) 1977-06-10 1978-06-09 Dispositif pour la reconnaissance d'une frequence dans un signal code en mic
IE1170/78A IE46855B1 (en) 1977-06-10 1978-06-09 A device for detecting a frequency in a pcm coded signal
JP6901678A JPS545321A (en) 1977-06-10 1978-06-09 Pcm coded signal frequency detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7717814A FR2394213A1 (fr) 1977-06-10 1977-06-10 Dispositif pour la reconnaissance d'une frequence dans un signal code en mic

Publications (2)

Publication Number Publication Date
FR2394213A1 true FR2394213A1 (fr) 1979-01-05
FR2394213B1 FR2394213B1 (fr) 1980-01-04

Family

ID=9191938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7717814A Granted FR2394213A1 (fr) 1977-06-10 1977-06-10 Dispositif pour la reconnaissance d'une frequence dans un signal code en mic

Country Status (14)

Country Link
US (1) US4194092A (fr)
JP (1) JPS545321A (fr)
BE (1) BE867445A (fr)
BR (1) BR7803730A (fr)
CA (1) CA1111588A (fr)
DE (1) DE2824565A1 (fr)
DK (1) DK259178A (fr)
FR (1) FR2394213A1 (fr)
GB (1) GB2000345B (fr)
IE (1) IE46855B1 (fr)
IT (1) IT1094884B (fr)
LU (1) LU79790A1 (fr)
NL (1) NL7806252A (fr)
SE (1) SE418136B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS558120A (en) * 1978-06-30 1980-01-21 Nec Corp Tone detection device
US4352962A (en) * 1980-06-27 1982-10-05 Reliance Electric Company Tone responsive disabling circuit
CA1137632A (fr) * 1980-09-25 1982-12-14 Claude J.J. Champagne Demodulateur de signaux modules par impulsions et codage initialement modules par deplacement de frequence
JPS60121856A (ja) * 1983-12-06 1985-06-29 Nec Corp 単一周波数信号検出回路
JPS6292553A (ja) * 1985-10-18 1987-04-28 Kokusai Denshin Denwa Co Ltd <Kdd> デイジタル伝送路の監視制御方式
US4881221A (en) * 1988-06-23 1989-11-14 Kentrox Industries, Inc. Method and apparatus for disabling an echo canceller on a digital telecommunications network
DE4119963A1 (de) * 1991-06-18 1992-12-24 Philips Patentverwaltung Echokompensator
US5404807A (en) * 1992-06-09 1995-04-11 Riso Kagaku Corporation Three dimensional image formation process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3624520A (en) * 1970-01-05 1971-11-30 Frank A Perkins Jr Wide band digital phase detector
US3647993A (en) * 1970-05-18 1972-03-07 Wescom Tone disabler
US3783194A (en) * 1972-11-20 1974-01-01 Milgo Electronic Corp Data modem having a fast turn-around time over direct distance dialed networks
FR2240583B1 (fr) * 1973-08-08 1976-11-12 Cit Alcatel

Also Published As

Publication number Publication date
DE2824565C2 (fr) 1987-07-23
LU79790A1 (fr) 1979-02-02
GB2000345A (en) 1979-01-04
NL7806252A (nl) 1978-12-12
IT1094884B (it) 1985-08-10
DK259178A (da) 1978-12-11
BR7803730A (pt) 1979-02-20
BE867445A (fr) 1978-11-27
JPS6224980B2 (fr) 1987-06-01
IE781170L (en) 1978-12-10
IT7823972A0 (it) 1978-05-30
GB2000345B (en) 1982-01-06
FR2394213B1 (fr) 1980-01-04
SE7806681L (sv) 1978-12-11
IE46855B1 (en) 1983-10-05
US4194092A (en) 1980-03-18
SE418136B (sv) 1981-05-04
JPS545321A (en) 1979-01-16
DE2824565A1 (de) 1978-12-21
CA1111588A (fr) 1981-10-27

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Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property
ST Notification of lapse