Device for the transformation of MPEG 2-type multimedia and audiovisual contents into secured contents of the same type

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United States of America Patent

PATENT NO 7702103
APP PUB NO 20050213760A1
SERIAL NO

11101793

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Abstract

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A process for distributing video sequences according to a nominal flux format including a succession of images, where each image includes a succession of blocks, and in which at least one of blocks in one of the images is calculated by motion prediction relative to at least one reference image, where the motion prediction is encoded in the flux with at least one motion vector, the flux being processed, before transmission to client equipment, with an analysis for generating a first modified flux having the format of a nominal flux and having images modified by substitution of selected data with selected data of the same nature, but random, and a second flux of any format including the substituted data and digital information likely to allow reconstruction of the modified flux, then transmitting separately, in real or deferred time, the two fluxes generated from a server toward the client equipment, and for which is calculated on the client equipment a synthesis of a nominal format flux as a function of the primary flux and of the second flux distinguished by the fact that the modification includes modifying at least one of the motion vectors.

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Patent Owner(s)

Patent OwnerAddress
NAGRA FRANCE28 RUE DU COLONEL PIERRE AVIA PARIS 75015

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Georges, Sébastien Paris, FR 14 26
Lecomte, Daniel Paris, FR 62 952

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