Film fingerprinting

G - Physics – 06 – T

Patent

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G06T 1/00 (2006.01)

Patent

CA 2562412

A technique for film marking includes coding a print identifier into a binary- coded bit-complement serial number; identifying particular frames (bit frames) that will be used to convey the bits (binary digits) of the binary-coded bit- complement serial number and marking these bit frames in accordance with the particular bit values of the binary-coded bit-complement serial number. The presence of a predefined mark on a bit frame is representative of a binary digit having a value of one, while the absence of the predefined mark on a bit frame is representative of a binary digit having a value of zero.

L'invention concerne une technique de marquage d'un film, qui consiste à: coder un identificateur d'empreinte en un nombre ordinal de complément de bits codé binaire; identifier des trames particulières (trames binaires) devant être utilisées pour acheminer les bits (chiffres binaires) du nombre ordinal de complément de bits codé binaire; et marquer ces trames binaires en fonction des valeurs de bit particulières du nombre ordinal de complément de bits codé binaire. La présence d'une marque prédéfinie sur une trame binaire représente un chiffre binaire dont la valeur est un, tandis que l'absence de la marque prédéfinie sur une trame binaire représente un chiffre binaire dont la valeur est nulle.

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