FR2359561A1 - Dispositif pour la reception de signaux de signalisation a frequences vocales - Google Patents

Dispositif pour la reception de signaux de signalisation a frequences vocales

Info

Publication number
FR2359561A1
FR2359561A1 FR7722066A FR7722066A FR2359561A1 FR 2359561 A1 FR2359561 A1 FR 2359561A1 FR 7722066 A FR7722066 A FR 7722066A FR 7722066 A FR7722066 A FR 7722066A FR 2359561 A1 FR2359561 A1 FR 2359561A1
Authority
FR
France
Prior art keywords
signals
signal
receives
reception unit
audio frequencies
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.)
Withdrawn
Application number
FR7722066A
Other languages
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2359561A1 publication Critical patent/FR2359561A1/fr
Withdrawn legal-status Critical Current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
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Dispositif de réception utilisé dans des systèmes de signalisation par fréquences vocales et muni d'un détecteur de signaux de conversation qui, du fait de comparer la moyenne des valeurs absolues des signaux de sortie à l'amplitude maximale de ces signaux, définit si les signaux d'entrée sont formés par une seule composante de signal sinusoïdale ou par plusieurs composantes de ce genre Application aux systèmes de signalisation par registre(s).
FR7722066A 1976-07-20 1977-07-19 Dispositif pour la reception de signaux de signalisation a frequences vocales Withdrawn FR2359561A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7608047A NL7608047A (nl) 1976-07-20 1976-07-20 Ontvanginrichting voor toonfrequente tekens.

Publications (1)

Publication Number Publication Date
FR2359561A1 true FR2359561A1 (fr) 1978-02-17

Family

ID=19826629

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7722066A Withdrawn FR2359561A1 (fr) 1976-07-20 1977-07-19 Dispositif pour la reception de signaux de signalisation a frequences vocales

Country Status (7)

Country Link
JP (1) JPS5313810A (fr)
BE (1) BE856903A (fr)
BR (1) BR7704723A (fr)
DE (1) DE2730453A1 (fr)
FR (1) FR2359561A1 (fr)
NL (1) NL7608047A (fr)
SE (1) SE7708218L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228096A2 (fr) * 1985-12-31 1987-07-08 Wang Laboratories Inc. Détecteur et discriminateur d'un signal utilisant le facteur de crête de forme d'ondes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228096A2 (fr) * 1985-12-31 1987-07-08 Wang Laboratories Inc. Détecteur et discriminateur d'un signal utilisant le facteur de crête de forme d'ondes
EP0228096A3 (en) * 1985-12-31 1989-03-29 Wang Laboratories Inc. Signal detection and discrimination using waveform peak factor

Also Published As

Publication number Publication date
SE7708218L (sv) 1978-01-21
BE856903A (fr) 1978-01-18
JPS5313810A (en) 1978-02-07
DE2730453A1 (de) 1978-01-26
BR7704723A (pt) 1978-05-16
NL7608047A (nl) 1978-01-24

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Legal Events

Date Code Title Description
ST Notification of lapse