H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/34
H04N 7/08 (2006.01) G06F 3/153 (2006.01)
Patent
CA 1189612
SYSTEM FOR DIGITAL TRANSMISSION AND DISPLAY OF TEXTS ON A TELEVISION SET SCREEN ABSTRACT OF THE DISCLOSURE A system for digitally transmitting and displaying texts on a television screen, wherein the transmitter station broadcasts, particularly in the form of data packs, data from several channels, the data packs from different channels being possibly time multiplexed, each pack comprising a prefix signal allowing a receiver to accept the data packs of a channel and to reject data packs, the set of the data packs of a channel constituting a magazine made of several pages, wherein the data packs belonging to a page are transmitted not multiplexed with data packs of another page of the same magazine, data belonging to a page beginning with a page flag followed by data indicating the page number, and ending with the next page flag, the system receiver comprising a keyboard making it possible to dial the number of the wished page, a circuit for recognizing the page flags which energized a comparator circuit comparing the data that immediately follow any page flag with the number dialled on the keyboard, data being, when the comparison is positive, sent to a memory that stores the character data, a character generator being capable to display on the screen of a television receiver tube the characters from data read out from said memory.
330924
Barda Jean-Francis
Brusq Roger
Fournier Claude
Le Marouille Martine
Marti Bernard
Etablissement Public de Diffusion Dit "telediffusion de France"; Represented By The Secretaire D'etat Aux Postes Et Telecommunica
Shapiro Cohen
LandOfFree
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