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EP0070949A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Transmission method for voice and digital data and arrangement for carrying out said method

Assignee: Compagnie IBM France SAS
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Filing: 1981-07-28
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Granted: —
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Expires: 2001-07-28
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Abstract

Abstract Translated from French Le procédé permet de concentrer la transmission de voix et de données sur un nombre réduit de lignes téléphoniques. Il consiste tout d'abord en un traitement de chaque signal vocal pour en extraire d'une part un signal analogique dit de bande de base, et d'autre part des paramètres caractéristiques de la voix codés en numérique. Lesdits paramètres sont ensuite multiplexés avec des données pures puis soumis à une opération de modulation. Le signal analogique résultant de la modulation est alors additionné à la bande de base et ensemble est transmis sur une ligne téléphonique. The method enables voice and data transmission to be concentrated on a reduced number of telephone lines. It consists first of all in processing each voice signal in order to extract on the one hand an analog signal called baseband, and on the other hand characteristic parameters of the voice coded in digital. Said parameters are then multiplexed with pure data and then subjected to a modulation operation. The analog signal resulting from the modulation is then added to the baseband and together is transmitted over a telephone line.

Inventors

  • 👤 Claude Galand
  • 👤 Henri Nussbaumer

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 21:10
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/06; H04M11/062; H04B; H04B1/00; H04B1/66; H04B1/667

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US3139487A Cited
US3622704A Cited
FR2305070A1 Cited
FR2339924A1 Cited
FR2389277A1 Cited
EP0002998A1 Cited

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