The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 1985
Filed:
Jan. 24, 1983
Applicant:
Inventors:
Jose Botrel, Liffre, FR;
Sami Harari, Paris, FR;
Joseph Briere, Cesson-Sevigne, FR;
Bernard Louvel, Rennes, FR;
Assignees:
L'Etat Francais represente par le Ministre des PTT (Centre National, , US;
Telediffusion de France, Montrouge, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 35 ;
Abstract
A videotex asynchroneous transmission system uses a parity bit for each character, with a continuous ARQ-type retransmission method. The data are transmitted in blocks (so-called 'code words'). Each code word is comprised of a block of seventeen bytes '1'-'15' constituting the characters which are to be transmitted encoded by seven bits b1-b7. The 8th bit b8 of each byte is the parity bit. The 16th byte is the check byte of the code word, and the 17th byte being the enabling byte of the code word.