ADAPTIVE AND PROGRESSIVE PROTECTION OF FIXED IMAGES ENCODED IN WAVELETS
First Claim
1. A process for secured distribution of fixed numerical images according to a nominal format resulting from numerical encoding in wavelets, comprising:
- modifying at least one simple element of a block of a packet representing an original stream according to at least a substitution operation comprising extracting the simple element, followed by replacement of the simple element by lure data; and
modifying a principal stream to conform to a nominal format comprising modified blocks and packets;
transmitting, by a path that is separate from the principal stream, complementary numerical information associated with the principal stream; and
allowing reconstruction of an original stream from calculations, on destination equipment, as a function of the principal stream and the complementary information.
2 Assignments
0 Petitions
Accused Products
Abstract
A process for secured distribution of fixed numerical images according to a nominal format resulting from numerical encoding in wavelets, represented by a original stream including a packet relating to organization of a binary sequence that contains at least a block that regroups numerically encoded simple elements according to a mode specified inside the stream and utilized by decoders that are capable of reconstructing or decoding it to be able to correctly display the image including modifying at least one of the simple elements according to at least a substitution operation including extracting the simple element, followed by its replacement by lure data, modifying a principal stream to conform to a nominal format including modified blocks and packets, and by a path that is separate from the principal stream of complementary numerical information and allowing reconstruction of the original stream from calculations, on destination equipment, as a function of the principal stream and the complementary information.
9 Citations
28 Claims
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1. A process for secured distribution of fixed numerical images according to a nominal format resulting from numerical encoding in wavelets, comprising:
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modifying at least one simple element of a block of a packet representing an original stream according to at least a substitution operation comprising extracting the simple element, followed by replacement of the simple element by lure data; and modifying a principal stream to conform to a nominal format comprising modified blocks and packets; transmitting, by a path that is separate from the principal stream, complementary numerical information associated with the principal stream; and allowing reconstruction of an original stream from calculations, on destination equipment, as a function of the principal stream and the complementary information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for the secured distribution of fixed numerical images according to a nominal stream format, comprising:
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an encoder to set into motion a numerical encoding into wavelets according to the nominal format; means of transmission of a numerical stream; means for processing an original stream by modifying at least one of simple elements of a principal stream conforming to the nominal format according to at least a substitution operation comprising extracting the simple element, followed by replacement of the simple element by lure data; and means to transfer by a path that is separate from the principal stream complementary information corresponding to the modification.
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28. An apparatus for restitution of fixed numerical images according to a nominal format of images, comprising:
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a decoder according to the nominal format; means of reception of a numerical stream comprising a principal stream in which at least one of simple elements of the principal stream is modified according to at least a substitution operation comprising extracting the simple element, followed by replacement of the simple element by lure data; means of reception of complementary information associated with the principal stream; and means for reconstruction of an original stream from calculations as a function of the principal stream and the complementary information.
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Specification