CA2192341A1 - Procede et dispositif de codage, transmission, stockage et decodage des donnees - Google Patents

Procede et dispositif de codage, transmission, stockage et decodage des donnees

Info

Publication number
CA2192341A1
CA2192341A1 CA002192341A CA2192341A CA2192341A1 CA 2192341 A1 CA2192341 A1 CA 2192341A1 CA 002192341 A CA002192341 A CA 002192341A CA 2192341 A CA2192341 A CA 2192341A CA 2192341 A1 CA2192341 A1 CA 2192341A1
Authority
CA
Canada
Prior art keywords
signal
composite
data
accordance
signals
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.)
Abandoned
Application number
CA002192341A
Other languages
English (en)
Inventor
Madison E. Priest
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.)
VISION TEK LP
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2192341A1 publication Critical patent/CA2192341A1/fr
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/108—Adaptations for transmission by electrical cable the cable being constituted by a pair of wires
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention concerne la transmission de l'information via des liaisons de communications (17) telles qu'une ligne téléphonique, le codage et le décodage des données, ainsi que le stockage de telles informations codées. Le système permet la transmission en temps réel d'images vidéo via une ligne téléphonique à paire torsadée. Le dispositif comporte un codeur de données (11, 23) constitué, d'une part, d'un générateur de fréquences vocales (24) produisant une fréquence vocale fixe dans une plage de fréquences audio et, d'autre part, d'un générateur d'harmoniques (25) assurant la modulation en phase d'une fréquence d'entrée. Le signal composite est appliqué à la liaison de communications (17) dont l'extrémité est équipée d'un décodeur (18, 21, 32, 35, 36). Ce décodeur comporte une logique de détection de phase (18, 21) pilotant un convertisseur de fréquences commandé en tension (21, 36) décodant les données codées et reproduisant les signaux H.F.
CA002192341A 1994-06-06 1995-05-24 Procede et dispositif de codage, transmission, stockage et decodage des donnees Abandoned CA2192341A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25416494A 1994-06-06 1994-06-06
US254,164 1994-06-06

Publications (1)

Publication Number Publication Date
CA2192341A1 true CA2192341A1 (fr) 1995-12-14

Family

ID=22963178

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002192341A Abandoned CA2192341A1 (fr) 1994-06-06 1995-05-24 Procede et dispositif de codage, transmission, stockage et decodage des donnees

Country Status (4)

Country Link
AU (1) AU2599395A (fr)
CA (1) CA2192341A1 (fr)
IL (1) IL114016A (fr)
WO (1) WO1995034167A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5751338A (en) * 1994-12-30 1998-05-12 Visionary Corporate Technologies Methods and systems for multimedia communications via public telephone networks
GB2308526B (en) * 1994-12-30 1998-01-28 Visionary Corporate Technologi Methods and systems for multimedia communications via public telephone networks
US6972786B1 (en) 1994-12-30 2005-12-06 Collaboration Properties, Inc. Multimedia services using central office

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580903A (en) * 1947-06-02 1952-01-01 Rca Corp Color television system
US3263027A (en) * 1962-12-11 1966-07-26 Beltrami Aurelio Simultaneous bilateral televideophonic communication systems
US3873771A (en) * 1972-04-11 1975-03-25 Telescan Communications System Simultaneous transmission of a video and an audio signal through an ordinary telephone transmission line
US4249214A (en) * 1979-03-23 1981-02-03 Rca Corporation Exciter having incidental phase correction compensation in consonance with output power level
US4710917A (en) * 1985-04-08 1987-12-01 Datapoint Corporation Video conferencing network
DE3786946T2 (de) * 1986-04-30 1994-01-27 Sharp Kk Verfahren und System für Multiplexübertragung eines Audiosignals und eines Videosignals über ein Kommunikationskabel.
US5172231A (en) * 1991-07-16 1992-12-15 Electronics Missiles & Communications, Inc. S-band video signal transmitter

Also Published As

Publication number Publication date
AU2599395A (en) 1996-01-04
WO1995034167A1 (fr) 1995-12-14
IL114016A0 (en) 1995-10-31
IL114016A (en) 1999-04-11

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Legal Events

Date Code Title Description
FZDE Discontinued