A method and apparatus for reading film grain patterns in a...

H - Electricity – 04 – N

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H04N 5/262 (2006.01) H04N 7/26 (2006.01) H04N 7/36 (2006.01)

Patent

CA 2584029

The present invention provides a method and apparatus for reading film grain patterns in a raster order in film grain simulation including establishing a pseudo-random starting position, repeating the pseudo-random starting position for each line of a group of film grain blocks, and using a different pseudo- random starting position for each display line of a next group of film grain blocks. In various embodiments of the present invention, the different pseudo- random starting positions are triggered by resetting at least one seed value of a pseudo-random number generator implemented to determine said pseudo- random starting positions.

Procédé et appareil de lecture de motifs de grain de film selon un ordre de trame dans une simulation de film consistant à établir une position de départ pseudo-aléatoire, à répéter la position de départ pseudo-aléatoire pour chaque ligne d'un groupe de blocs de grain de film et à utiliser une position de départ différente pour chaque ligne d'affichage d'un groupe suivant de blocs de grain de film. Dans plusieurs modes de réalisation, les positions de départ différentes sont enclenchées par reconfiguration d'au moins une valeur germe d'un générateur de nombre pseudo-aléatoire mis en oeuvre pour déterminer les positions de départ pseudo-alétaoires.

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