FR2759228A3 - Broadcast system for transmitting video text pages to public - Google Patents

Broadcast system for transmitting video text pages to public Download PDF

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Publication number
FR2759228A3
FR2759228A3 FR9701259A FR9701259A FR2759228A3 FR 2759228 A3 FR2759228 A3 FR 2759228A3 FR 9701259 A FR9701259 A FR 9701259A FR 9701259 A FR9701259 A FR 9701259A FR 2759228 A3 FR2759228 A3 FR 2759228A3
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FR
France
Prior art keywords
receiver
minitel
frequency
different
public
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
FR9701259A
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French (fr)
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FR2759228B3 (en
Inventor
Jean Paul Francois Ric Grimaud
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR9701259A priority Critical patent/FR2759228B3/en
Publication of FR2759228A3 publication Critical patent/FR2759228A3/en
Application granted granted Critical
Publication of FR2759228B3 publication Critical patent/FR2759228B3/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/08—Telephonic communication systems specially adapted for combination with other electrical systems specially adapted for optional reception of entertainment or informative matter
    • H04M11/085—Telephonic communication systems specially adapted for combination with other electrical systems specially adapted for optional reception of entertainment or informative matter using a television receiver, e.g. viewdata system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0882—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of character code signals, e.g. for teletext

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The system for allowing the wider public to receive images organised into pages of text uses a 'Videotext' server (1) which is connected to a radio transmitter transmitting on a characteristic wavelength (lambda). This wavelength is such as to lie in the range from 88 - 108 MHz and operates with frequency modulation (2). The transmitter is connected to an aerial (3). Reception of the information is achieved by a receiver (4) which is connected by a link cable (5) to a display terminal such as a 'Minitel' device (6). The type of modulation used may be different in different frequency bands, whilst the receiver may also be of an alternative type.

Description

La présente invention concerne un dispositif pour permettre au grand public de recevoir par voie hertzienne, des images organisées en pages de textes selon le mode Vidéotex , standard utilisé par le Minitel . The present invention relates to a device for enabling the general public to receive over the air, images organized in text pages according to the Videotex mode, standard used by the Minitel.

L'émission s'effectue sur la bande de fréquence réservée aux radios libres, en cohabitation avec celles-ci. La plage de fréquence commence de quatre vingt huit mégahertz à cent huit mégahertz, en modulation de fréquence.The transmission takes place on the frequency band reserved for free radios, in cohabitation with them. The frequency range starts from eighty eight megahertz to one hundred and eight megahertz, in frequency modulation.

La transmission de ces images organisées en pages de textes est traditionnellement effectuée par des serveurs télématiques, acheminées par les réseaux câblés des télécommunications, ce qui oblige l'utilisateur à payer des frais de télécommunications majorés du prix des prestations de services rendus, et ceci au prorata du temps de connexion au serveur. The transmission of these images organized in pages of texts is traditionally carried out by telematic servers, routed by the cable telecommunications networks, which obliges the user to pay telecommunications costs increased by the price of the services rendered, and this at in proportion to the time of connection to the server.

Certains de ces serveurs télématiques sont, certes, peu onéreux mais interdisent tout de même à des publics défavorisés des connexions longues et répétitives. Some of these telematic servers are certainly inexpensive but still prohibit disadvantaged audiences from long and repetitive connections.

Le dispositif selon l'invention permet de remédier à cet inconvénient. Il comporte un serveur télématique, un émetteur en modulation de fréquence utilisant une fréquence x comprise entre quatre vingt huit mégahertz et cent huit mégahertz, sur la bande allouée actuellement aux radios libres, un traditionnel récepteur en modulation de fréquence possédant la bande sus-décrite, un terminal type Minitel et enfin un cordon de liaison - décrit sur la figure 1 assurant la liaison électrique entre le récepteur et le terminal. The device according to the invention overcomes this drawback. It comprises a telematic server, a frequency modulation transmitter using a frequency x of between eighty eight megahertz and one hundred and eight megahertz, on the band currently allocated to free radios, a traditional frequency modulation receiver having the band described above, a Minitel type terminal and finally a connecting cord - described in Figure 1 ensuring the electrical connection between the receiver and the terminal.

Pour la partie émission, un serveur génère des images organisées en pages de textes, cadence au mieux le défilement desdites images pour permettre aux utilisateurs de les lire dans leur intégralité. Un enregistrement peut être opéré sur support magnétique traditionnel (bande magnétique ou cassette audio) pour permettre la rediffusion des textes sans l'utilisation du serveur. Le signal en provenance soit du serveur soit du support magnétique est codé sous la forme de caractères ASCII (American Standard Code for Information
Interchange), codage normalisé de sept bits pour la transmission d'informations. Ledit signal est ensuite dirigé vers l'émetteur qui rayonne à l'aide d'un aérien en modulation de fréquence en émettant sur une fréquence x, conformément à la loi en vigueur.For the emission part, a server generates images organized in pages of texts, cadence at best the scrolling of said images to allow the users to read them in their entirety. A recording can be carried out on traditional magnetic support (magnetic tape or audio cassette) to allow the replay of texts without the use of the server. The signal from either the server or the magnetic medium is encoded in the form of ASCII characters (American Standard Code for Information
Interchange), standardized seven-bit coding for the transmission of information. Said signal is then directed to the transmitter which radiates using an aerial in frequency modulation by transmitting on a frequency x, in accordance with the law in force.

Pour la partie réception, l'utilisateur syntonisera son récepteur en modulation de fréquence sur la fréquence X, et contrôlera à l'oreille la présence de la porteuse modulé diffusant un son caractéristique. Après quoi le même utilisateur mettra sous tension le terminal Minitel , et connectera le cordon de la sortie basse fréquence du récepteur (prise extérieur pour casque) à la prise Minitel . L'utilisateur fera connecter le Minitel à l'aide de la touche Connexion et réglera si nécessaire le volume de sortie basse fréquence du récepteur jusqu'à l'obtention à l'écran des pages de textes. En cas d'apparition à l'écran de caractères parasites, revoir l'orientation de l'antenne du récepteur et/ou refaire la syntonisation. L'utilisateur peut, s'il le souhaite, conserver les pages de textes grâce à l'enregistrement de celles-ci sur support magnétique (cassette audio ou bande magnétique) et ainsi refaire une lecture en différé. For the reception part, the user will tune his receiver in frequency modulation on frequency X, and will check by ear the presence of the modulated carrier diffusing a characteristic sound. After which the same user will power on the Minitel terminal, and connect the cord of the low frequency output of the receiver (external socket for headphones) to the Minitel socket. The user will connect the Minitel using the Connection key and adjust the receiver's low frequency output volume if necessary until the text pages appear on the screen. If parasitic characters appear on the screen, review the orientation of the receiver antenna and / or redo tuning. The user can, if he wishes, keep the pages of texts thanks to the recording of these on magnetic support (audio cassette or magnetic tape) and thus repeat a delayed reading.

Les dessins annexés illustrent l'invention :
La figure 1 représente en coupe, le cordon de liaison entre le récepteur et le terminal. La prise mâle de type Jack (1) sera connectée sur le récepteur, les prises mâle (4) et femelles (3) de télécommunications seront connectées à la prise de même type du Minitel . Les conducteurs (2) assurent la liaison électrique entre le récepteur et le
Minitel .The accompanying drawings illustrate the invention:
Figure 1 shows in section, the connecting cord between the receiver and the terminal. The male Jack type plug (1) will be connected to the receiver, the male (4) and female (3) telecommunications plugs will be connected to the same type of socket on the Minitel. The conductors (2) provide the electrical connection between the receiver and the
Minitel.

La figure 2 représente l'ensemble du dispositif d'émission et de réception.FIG. 2 represents the whole of the transmission and reception device.

En référence à la figure 2, le dispositif d'émission comporte un serveur Vidéotex (1), relié à l'émetteur rayonnant sur une fréquence k en modulation de fréquence, entre quatre vingt huit et cent huit mégahertz (2), lui-même relié à l'aérien (3). Le dispositif de réception est composé d'un récepteur syntonisé sur la fréquence k (4), relié par le cordon de liaison (5), lui-même relié au terminal Minitel (6). With reference to FIG. 2, the transmission device comprises a Videotex server (1), connected to the transmitter radiating on a frequency k in frequency modulation, between eighty eight and one hundred and eight megahertz (2), itself connected to the air (3). The reception device is composed of a receiver tuned to the frequency k (4), connected by the connecting cord (5), itself connected to the Minitel terminal (6).

Le dispositif selon l'invention, compte-tenu de la situation actuelle du marché du travail dans le pays, est particulièrement destiné à diffuser les offres d'emploi et l'ensemble des informations relatives au marché du travail.  The device according to the invention, taking into account the current situation of the labor market in the country, is particularly intended to disseminate job offers and all information relating to the labor market.

Claims (4)

REVENDICATIONS 1) Dispositif pour permettre au grand public de recevoir par voie hertzienne des images organisées en pages de textes caractérisé en ce que la partie émission composée d'un serveur Vidéotex (1) lequel est relié à l'émetteur rayonnant sur une fréquence X comprise en quatre vingt huit et cent huit mégahertz en modulation de fréquence (2), luimême relié à l'aérien (3) ; la partie réception composée d'un récepteur (4) relié grâce au cordon de liaison (5) au terminal Minitel (6). 1) Device for enabling the general public to receive over the air images organized in pages of texts characterized in that the transmission part composed of a Videotex server (1) which is connected to the transmitter radiating on a frequency X included in eighty-eight and one hundred and eight megahertz in frequency modulation (2), itself connected to the aerial (3); the reception part composed of a receiver (4) connected thanks to the connection cord (5) to the Minitel terminal (6). 2) Dispositif selon la revendication 1 caractérisé en ce que l'émission se fasse sur des bandes de fréquence différentes dans des modes de modulation de la porteuse d'émission différents. 2) Device according to claim 1 characterized in that the transmission takes place on different frequency bands in different modulation modes of the transmission carrier. 3) Dispositif selon la revendication 1 ou la revendication 2 caractérisé en ce que le terminal utilisé soit tout autre qu'un Minitel (6). 3) Device according to claim 1 or claim 2 characterized in that the terminal used is any other than a Minitel (6). 4) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que le cordon de liaison (5) entre le récepteur (4) et le Minitel (6) soit différent de celui énoncé en figure 1 notamment par l'une de ses terminaisons de branchement.  4) Device according to any one of the preceding claims, characterized in that the connecting cord (5) between the receiver (4) and the Minitel (6) is different from that stated in FIG. 1 in particular by one of its terminations of connection.
FR9701259A 1997-02-03 1997-02-03 DEVICE FOR ALLOWING THE GENERAL PUBLIC TO RECEIVE OVER THE WAY IMAGES ORGANIZED IN TEXT PAGES Expired - Fee Related FR2759228B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9701259A FR2759228B3 (en) 1997-02-03 1997-02-03 DEVICE FOR ALLOWING THE GENERAL PUBLIC TO RECEIVE OVER THE WAY IMAGES ORGANIZED IN TEXT PAGES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9701259A FR2759228B3 (en) 1997-02-03 1997-02-03 DEVICE FOR ALLOWING THE GENERAL PUBLIC TO RECEIVE OVER THE WAY IMAGES ORGANIZED IN TEXT PAGES

Publications (2)

Publication Number Publication Date
FR2759228A3 true FR2759228A3 (en) 1998-08-07
FR2759228B3 FR2759228B3 (en) 1998-12-04

Family

ID=9503320

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9701259A Expired - Fee Related FR2759228B3 (en) 1997-02-03 1997-02-03 DEVICE FOR ALLOWING THE GENERAL PUBLIC TO RECEIVE OVER THE WAY IMAGES ORGANIZED IN TEXT PAGES

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Country Link
FR (1) FR2759228B3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195998A1 (en) * 2000-09-21 2002-04-10 Command Audio Corporation Distributed media on-demand information service
FR2822564A1 (en) * 2001-03-26 2002-09-27 Jacques Saubade Radio-wave transmission of advertising, news, etc. in the form of HTML pages to PCs, terminals, etc. equipped with an FM receiver allowing data to be transmitted in a low cost manner to a potentially large base of users

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195998A1 (en) * 2000-09-21 2002-04-10 Command Audio Corporation Distributed media on-demand information service
US6490432B1 (en) 2000-09-21 2002-12-03 Command Audio Corporation Distributed media on-demand information service
FR2822564A1 (en) * 2001-03-26 2002-09-27 Jacques Saubade Radio-wave transmission of advertising, news, etc. in the form of HTML pages to PCs, terminals, etc. equipped with an FM receiver allowing data to be transmitted in a low cost manner to a potentially large base of users
WO2002077834A1 (en) * 2001-03-26 2002-10-03 Com 1 Data broadcasting system and a receiver for one such system

Also Published As

Publication number Publication date
FR2759228B3 (en) 1998-12-04

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