Abstract:
A process for secured distribution of vector visual sequences in at least two dimensions, animated and including a succession of frames containing at least one multidimensional geometric object to be displayed on a screen of a user and determined by at least one parameter including: analyzing the stream prior to transmission to addressee equipment to generate a modified main stream by deletion and replacement of information coding the original visual signal, having a format the same as the format of the original stream, but of which at least one frame was modified, and complementary information of any format including digital information suitable for permitting reconstruction of the modified frames, which modified main stream and which complementary information are transmitted separately to the addressee equipment.
Abstract:
The present invention provides a means and an apparatus for watermarking a digital signal. A particular content which is to be made available by a content provider to potential content users is prepared by encoding the content into a plurality of encoded streams, each encoded stream being encoded according to a different bit-rate. Each encoded stream comprises a plurality of chunks and each chunk is retrievable by a requestor of content. Upon request of said content by a user, the plurality of chunks making up the content are selected from the plurality of the different encoded streams and a subset from that plurality of chunks is watermarked using a unique identifying parameter associated with the requestor.
Abstract:
A process for secured distribution of vector visual sequences in at least two dimensions, animated and including a succession of frames containing at least one multidimensional geometric object to be displayed on a screen of a user and determined by at least one parameter including: analyzing the stream prior to transmission to addressee equipment to generate a modified main stream by deletion and replacement of information coding the original visual signal, having a format the same as the format of the original stream, but of which at least one frame was modified, and complementary information of any format including digital information suitable for permitting reconstruction of the modified frames, which modified main stream and which complementary information are transmitted separately to the addressee equipment.
Abstract:
The application relates to a method for distributing a marked audiovisual sequence from a nominal audiovisual sequence, said nominal audiovisual sequence having a nominal content, wherein a first modified flow having a modified content different from the nominal content is generated, and a second marked complementary flow including marked complementary digital information is generated; said first modified flow and said marked complementary information are transmitted, so as to allow the restoration of said marked audiovisual sequence at the receiving item of equipment; an operation of marking said nominal audiovisual sequence is carried out, so as to determine a marked audiovisual sequence having a marked content; a difference is determined between said marked content, on the one hand, and said modified content or said nominal content, on the other hand; wherein said marked complementary digital information depend on said difference.
Abstract:
A process for automatically and adaptively scrambling digital video streams including analyzing structure and visual content of the digital video stream, and scrambling the digital video stream under regulation of an inference or decisional engine that selects a scrambling tool or tools to be applied to the digital video stream from a library of possible scrambling tools as a function of the analysis, of digital information relative to characteristics of a user, and from transport conditions of digital data in conformance with a base of predefined scrambling rules.
Abstract:
A method traces the origin of a (illegally) distributed video material. It fingerprints a data object A having a nominal stream format F to provide a fingerprinted data object B including a pre-fingerprinting forensic luring process.
Abstract:
A process for distributing digital video sequences in accordance with a nominal stream format including a succession of frames, each frame including at least one digital block regrouping a plurality of coefficients corresponding to simple, digitally coded visual elements is disclosed.
Abstract:
The present invention relates to a process for the distribution of video streams to a plurality of addressees, comprising a marking stage consisting in adding at least one visual element to this video stream, which marking stage is applied to an original video stream common to all the addressees and which is personalized for each addressee by the addition of a visual elements specific to the addressee that allows a rapid visual identification of this addressee, characterized in that this added visual element replaces part of the original video stream that is stored in the complementary information on the multimedia server. Another characteristic of the invention is that the reconstitution and the display of the original stream are carried out on the client equipment from the modified stream and from complementary information sent by the server after authentication of the client and as a function of his rights for being read and viewed without the display of the visual elements.
Abstract:
A process for distributing digital video sequences in accordance with a nominal stream format including a succession of frames, each frame including at least one digital block regrouping a plurality of coefficients corresponding to simple, digitally coded visual elements, including: a step of modifying at least one block of the stream, wherein the modification step acts in an adaptive manner on the original stream as a function of at least a part of characteristics representative of structure, contents and parameters of an original video stream, of a profile of an addressee, and of external events, and the modification step includes replacing a part of the coefficients to produce a modified main video stream in nominal format and complimentary modification information that allows reconstruction of the original stream by a decoder of addressed equipment, and wherein the scope of modifications is variable and determined by the representative characteristics, and the modified main video stream and the complementary information are transmitted by separate paths.
Abstract:
The application relates to a method for distributing a marked audiovisual sequence from a nominal audiovisual sequence, said nominal audiovisual sequence having a nominal content, wherein a first modified flow having a modified content different from the nominal content is generated, and a second marked complementary flow including marked complementary digital information is generated; said first modified flow and said marked complementary information are transmitted, so as to allow the restoration of said marked audiovisual sequence at the receiving item of equipment; an operation of marking said nominal audiovisual sequence is carried out, so as to determine a marked audiovisual sequence having a marked content; a difference is determined between said marked content, on the one hand, and said modified content or said nominal content, on the other hand; wherein said marked complementary digital information depend on said difference.