发明授权
- 专利标题: Low-complexity film grain simulation technique
- 专利标题(中): 低复杂度胶片颗粒模拟技术
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申请号: US11667846申请日: 2005-09-26
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公开(公告)号: US08472526B2公开(公告)日: 2013-06-25
- 发明人: Cristina Gomila , Joan Llach , Jeffrey Allen Cooper
- 申请人: Cristina Gomila , Joan Llach , Jeffrey Allen Cooper
- 申请人地址: FR Boulogne-Billancourt
- 专利权人: Thomson Licensing
- 当前专利权人: Thomson Licensing
- 当前专利权人地址: FR Boulogne-Billancourt
- 代理商 Robert D. Shedd; Robert B. Levy
- 国际申请: PCT/US2005/034723 WO 20050926
- 国际公布: WO2006/057703 WO 20060601
- 主分类号: H04N11/02
- IPC分类号: H04N11/02
摘要:
The simulation of film grain in a video image occurs by first creating a block (i.e., a matrix array) of transformed coefficients for a set of cut frequencies fHL, fVL, fHH and fVH associated with a desired grain pattern. (The cut frequencies fHL, fVL, fHH and fVH represent cut-off frequencies, in two dimensions, of a filter that characterizes the desired film grain pattern). The block of transformed coefficients undergoes an inverse transform to yield a bit-accurate film grain sample and the bit accurate sample undergoes scaling to enable blending with a video signal to simulate film grain in the signal.
公开/授权文献
- US20080152250A1 Low-Complexity Film Grain Simulation Technique 公开/授权日:2008-06-26