FR2404349A1 - Montage pour la reduction de la diaphonie dans les systemes mic - Google Patents

Montage pour la reduction de la diaphonie dans les systemes mic

Info

Publication number
FR2404349A1
FR2404349A1 FR7827185A FR7827185A FR2404349A1 FR 2404349 A1 FR2404349 A1 FR 2404349A1 FR 7827185 A FR7827185 A FR 7827185A FR 7827185 A FR7827185 A FR 7827185A FR 2404349 A1 FR2404349 A1 FR 2404349A1
Authority
FR
France
Prior art keywords
voltage level
transmission system
pcm
information bits
bit positions
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
FR7827185A
Other languages
English (en)
Other versions
FR2404349B1 (fr
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.)
Tenovis GmbH and Co KG
Original Assignee
Telefonbau und Normalzeit GmbH
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 Telefonbau und Normalzeit GmbH filed Critical Telefonbau und Normalzeit GmbH
Publication of FR2404349A1 publication Critical patent/FR2404349A1/fr
Application granted granted Critical
Publication of FR2404349B1 publication Critical patent/FR2404349B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/10—Arrangements for reducing cross-talk between channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

Montage pour la réduction de la diaphonie dans les systèmes téléphoniques à modulation par impulsions codées MIC. Les mots de code en MIC sont formés d'un bit de signe bv et de plusieurs bits d'information (bl à bn + m) pour représenter la valeur de la tension. Une ou plusieurs positions de bit (bl à bn) de chaque mot de code MIC qui contiennent l'information sur la valeur la plus faible de tension sont mises à la valeur de tension la plus basse (zéro) lorsqu'on établit au moyen d'un dispositif de surveillance UG qui vérifie les autres positions de bit (bn + 1 jusqu'à bn + m), sauf le bit de signe, du mot en code MIC, lesdites positions de bit (bn + 1 jusqu'à bn + m) représentent la valeur de tension la plus basse (zéro); et la mise desdites positions de bit (bl à bn) sur la valeur de tension la plus basse (zéro) est effectuée par ledit dispositif de surveillance UG. Application aux systèmes téléphoniques MIC.
FR7827185A 1977-09-23 1978-09-22 Montage pour la reduction de la diaphonie dans les systemes mic Expired FR2404349B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2742783A DE2742783C2 (de) 1977-09-23 1977-09-23 Schaltungsanordnung zur Reduzierung des Nebensprechens in PCM-Systemen

Publications (2)

Publication Number Publication Date
FR2404349A1 true FR2404349A1 (fr) 1979-04-20
FR2404349B1 FR2404349B1 (fr) 1986-04-04

Family

ID=6019671

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7827185A Expired FR2404349B1 (fr) 1977-09-23 1978-09-22 Montage pour la reduction de la diaphonie dans les systemes mic

Country Status (6)

Country Link
AT (1) AT376861B (fr)
BE (1) BE870217A (fr)
DE (1) DE2742783C2 (fr)
FR (1) FR2404349B1 (fr)
IT (1) IT1105981B (fr)
NL (1) NL7807876A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170087A2 (fr) * 1984-07-04 1986-02-05 Kabushiki Kaisha Toshiba Procédé et dispositif d'analyse et de synthèse de la parole humaine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422994A1 (de) * 1984-06-22 1986-01-02 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung zur ruhegeraeuschunterdrueckung bei nach dem pcm-prinzip durchgeschalteten fernsprechverbindungen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1295956A (fr) * 1961-05-02 1962-06-15 Labo Cent Telecommunicat Arrangements pour l'élimination du bruit dans les systèmes de transmission
FR1391161A (fr) * 1963-01-25 1965-03-05 Int Standard Electric Corp Transmission des valeurs numériques en code digital

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE391097B (sv) * 1976-02-10 1977-01-31 Ericsson Telefon Ab L M Sett att forbettra overhorningsdempningen mellan nerliggande kanaler i ett tidsmultiplexsystem samt anordning for utforande av settet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1295956A (fr) * 1961-05-02 1962-06-15 Labo Cent Telecommunicat Arrangements pour l'élimination du bruit dans les systèmes de transmission
FR1391161A (fr) * 1963-01-25 1965-03-05 Int Standard Electric Corp Transmission des valeurs numériques en code digital

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170087A2 (fr) * 1984-07-04 1986-02-05 Kabushiki Kaisha Toshiba Procédé et dispositif d'analyse et de synthèse de la parole humaine
EP0170087A3 (en) * 1984-07-04 1988-06-08 Kabushiki Kaisha Toshiba Method and apparatus for analyzing and synthesizing human speech

Also Published As

Publication number Publication date
DE2742783A1 (de) 1979-03-29
FR2404349B1 (fr) 1986-04-04
AT376861B (de) 1985-01-10
NL7807876A (nl) 1979-03-27
ATA687578A (de) 1984-05-15
IT7851210A0 (it) 1978-09-22
IT1105981B (it) 1985-11-11
BE870217A (fr) 1979-01-02
DE2742783C2 (de) 1982-06-09

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Legal Events

Date Code Title Description
ST Notification of lapse