G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 9/00 (2006.01) G06T 5/10 (2006.01)
Patent
CA 2587201
Film grain simulation within a receiver (11) occurs by first obtaining at least one block of pre-computed transformed coefficients. The block of pre- computed transformed coefficients undergoes filtering responsive to a frequency range that characterizes a desired pattern of the film grain. In practice, the frequency range lies within a set of cut frequencies fHL, fVL, fHH and fVH of a filter in two dimensions that characterizes a desired film grain pattern. Thereafter, the filtered set of coefficients undergoes an inverse transform to yield the film grain pattern.
Selon l'invention, la simulation de grain de film dans un récepteur (11) est mise en oeuvre tout d'abord par obtention d'au moins un bloc de coefficients transformés précalculés. Le bloc de coefficients transformés précalculés subit un filtrage sensible à une bande de fréquences qui caractérise un motif souhaité du grain de film. En pratique, la bande de fréquences est comprise dans un ensemble de fréquences de coupure fHL, fVL, fHH et fVH d'un filtre dans deux dimensions qui caractérise un motif de grain de film souhaité. Ensuite, l'ensemble filtré de coefficients est soumise à une transformée inverse pour produire le motif de grain de film.
Gomila Cristina
Llach Joan
Craig Wilson And Company
Thomson Licensing
LandOfFree
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