Program encoding and counterfeit tracking system and method

Details Program encoding and counterfeit tracking system and method Program encoding and counterfeit tracking system and method

Category

G - Physics

Subcategory

11

Subsubcategory

B

IPC codes

G11B 27/00 (2006.01) G03B 17/24 (2006.01) G06K 9/00 (2006.01) G11B 7/007 (2006.01) H04N 5/262 (2006.01)

Type

Patent

Patent number

CA 2480487

Description

Unique encoding of each of a substantial number of distribution video copies of a program such as a motion picture is produced by altering the images slightly at several pre-selected locations in the program in a uniquely coded pattern. Suspected counterfeits can be compared with an unaltered master video to determine the encoded number for the copy which was counterfeited to enable tracking the source of the counterfeit. Preferably, each frame of several whole scenes is altered at each location so as to make the alterations largely undetectable by counterfeiters but easily detected by comparison with an unaltered master video. Artifacts are inserted in patterns representing a unique number for the program. These supplement the encoding by alteration of images and gives added means to aid in tracing counterfeit copies.

Codage unique de chacune de nombreuses copies vidéo de distribution d'un programme comme un film cinématographique en altérant légèrement les images à plusieurs emplacements présélectionnés dans le programme dans un motif uniquement codé. Des contrefaçons présumées peuvent être comparées avec un vidéo original non altéré pour déterminer le numéro codé pour la copie qui a été contrefaite afin de permettre de repérer la source de la contrefaçon. De préférence, chaque trame de plusieurs scènes entières est altérée à chaque emplacement afin de rendre les altérations largement indétectables par les faussaires, mais facilement décelées en comparaison à un vidéo original non altéré. Des artéfacts sont insérés dans des motifs représentant un numéro unique pour le programme. Ceux-ci supplémentent le codage par l'altération des images et donnent des moyens ajoutés pour aider à repérer des copies contrefaites.

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