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:
Mar. 07, 1989
Filed:
Oct. 29, 1987
Claude Bacou, Neauphle le Chateau, FR;
Christian Cabrol, Plaisir, FR;
Rene Baptiste, Flancourt Maurepas, FR;
Andre Oisel, Elancourt, FR;
Bull, S.A., Paris, FR;
Abstract
A method and apparatus for transmission of digital data in which data words having M parallel bits are encoded into code words having N parallel bits, the code words being serially transmitted and being accompanied by flags such as Start Delimiter, End Delimeter of the frame or token. The code words and the flags are selected so as to balance the DC component. The time interval between two successive transitions of the serially transmitted signals is limited to four times the period of the serial transmission clock. For detection of errors in transmission, the Hamming distance between a flag and any encoded sequence of the same length extracted from any message is at least equal to 2. The invention is useful with transmitters and receivers that exploit the properties of the transmission method, and is applicable to data networks.