Watermarking of motion picture prints

Details Watermarking of motion picture prints Watermarking of motion picture prints

G - Physics

06

T

G06T 1/00 (2006.01) H04N 5/913 (2006.01)

Patent

CA 2562851

An apparatus for marking a film copy includes a mapper and a coder. The maper maps a print identifier to be associated with the film copy into a serial number comprising a sequence of J numbers. The coder creates at least two- error correcting numbers, e.g. Y and Z, as a function of one, or more, of the J numbers. The film copy is then marked in accordance with L numbers, which comprise at least the two-error correcting numbers Y and Z.

L'invention concerne un appareil comprenant un mappeur et un codeur, servant à marquer une copie d'un film. Le mappeur transforme un identificateur de copie destiné à être associé à la copie du film en un numéro de série comprenant une séquence de <I>J</I> chiffres. Le codeur crée au moins deux numéros de correction d'erreur, p. ex. <i>Y</i> et <i>Z</i>, qui sont une fonction d'un ou de plusieurs des <i>J</i> chiffres. La copie du film est ensuite tatouée au moyen de <i>L</i> chiffres, qui contiennent au moins les deux numéros de correction d'erreur <i>Y</i> et <i>Z</i>.

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