发明授权
US07738038B2 Content-dependent scan rate converter with adaptive noise reduction
有权
内容相关的扫描速率转换器,具有自适应降噪功能
- 专利标题: Content-dependent scan rate converter with adaptive noise reduction
- 专利标题(中): 内容相关的扫描速率转换器,具有自适应降噪功能
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申请号: US12123622申请日: 2008-05-20
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公开(公告)号: US07738038B2公开(公告)日: 2010-06-15
- 发明人: Jeffrey Kempf , Arnold P. Skoog , Clifford D. Fairbanks
- 申请人: Jeffrey Kempf , Arnold P. Skoog , Clifford D. Fairbanks
- 申请人地址: US TX Dallas
- 专利权人: Texas Instruments Incorporated
- 当前专利权人: Texas Instruments Incorporated
- 当前专利权人地址: US TX Dallas
- 代理商 Charles A. Brill; Wade James Brady, III; Frederick J. Telecky, Jr.
- 主分类号: H04N7/01
- IPC分类号: H04N7/01 ; H04N11/20 ; H04N5/74
摘要:
A content-dependent scan rate converter with adaptive noise reduction that provides a highly integrated, implementation efficient de-interlacer. By identifying and using redundant information from the image (motion values and edge directions), this scan rate converter is able to perform the tasks of film-mode detection, motion-adaptive scan rate conversion, and content-dependent video noise reduction. Adaptive video noise reduction is incorporated in the process where temporal noise reduction is performed on the still parts of the image, thus preserving high detail spatial information, and data-adaptive spatial noise reduction is performed on the moving parts of the image. A low-pass filter is used in flat fields to smooth out Gaussian noise and a direction-dependent median filter is used in the presence of impulsive noise or an edge. Therefore, the selected spatial filter is optimized for the particular pixel that is being processed to maintain crisp edges.
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