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:
May. 24, 1988
Filed:
Aug. 29, 1983
Gerard J Marie, Santeny-Villecresnes, FR;
Jean-Pierre Arragon, Roissy, FR;
La Radiotechnique, Suresnes, FR;
Abstract
Method of scrambling television pictures for which the video signals of each scanning line are of the M.A.C. type, that is to say time-division multiplexing of the analog chrominance and luminance components, characterized in that on transmission the components are each divided, in each line, one after the other, into two consecutive signals C and D, on the one hand, and F and G, on the other hand, the first signal C and F of which are then delayed for the duration of the second signal, and the second signals D and G are advanced for the duration of the first signals, the reference periods B and E which precede these respective components being excluded from this processing operation, the positions of the dividing points being derived from pseudo-random digital sequences, and the processing operation being intended to be applied on reception in the opposite sense for the simultaneous recovery of the luminance signal Y and the color difference signals U and V.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile