Invention Grant
US09177364B2 Film grain simulation method based on pre-computed transform coefficients
有权
基于预先计算的变换系数的胶片颗粒模拟方法
- Patent Title: Film grain simulation method based on pre-computed transform coefficients
- Patent Title (中): 基于预先计算的变换系数的胶片颗粒模拟方法
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Application No.: US11667581Application Date: 2005-10-26
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Publication No.: US09177364B2Publication Date: 2015-11-03
- Inventor: Cristina Gomila , Joan Llach
- Applicant: Cristina Gomila , Joan Llach
- Applicant Address: FR Boulogne-Billancourt
- Assignee: THOMSON LICENSING
- Current Assignee: THOMSON LICENSING
- Current Assignee Address: FR Boulogne-Billancourt
- Agent Robert D. Shedd; Robert B. Levy
- International Application: PCT/US2005/038503 WO 20051026
- International Announcement: WO2006/055193 WO 20060526
- Main IPC: H04N7/12
- IPC: H04N7/12 ; G06T5/00 ; G06T5/10 ; H04N19/176 ; H04N19/46 ; H04N19/117 ; H04N19/136 ; H04N19/80 ; H04N19/85

Abstract:
Film grain simulation within a receiver 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.
Public/Granted literature
- US20070297515A1 Film Grain Simulation Method Based on Pre-Computed Transform Coefficients Public/Granted day:2007-12-27
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