发明申请
US20050286638A1 Image flow knowledge assisted latency-free in-loop temporal filter
审中-公开
图像流知识辅助无延迟的环路时间滤波器
- 专利标题: Image flow knowledge assisted latency-free in-loop temporal filter
- 专利标题(中): 图像流知识辅助无延迟的环路时间滤波器
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申请号: US11166705申请日: 2005-06-23
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公开(公告)号: US20050286638A1公开(公告)日: 2005-12-29
- 发明人: Hitoshi Watanabe
- 申请人: Hitoshi Watanabe
- 专利权人: Qpixel Technology International, Inc.
- 当前专利权人: Qpixel Technology International, Inc.
- 主分类号: H04B1/66
- IPC分类号: H04B1/66 ; H04N5/14 ; H04N7/12 ; H04N7/26 ; H04N7/36 ; H04N11/02 ; H04N11/04
摘要:
Digital image acquisition device such as CCD/CMOS sensors often introduces random temporal noise into digital video sequences. Temporal noise generally carries high frequency components in both the spatial and temporal domains and is also random in nature. Because of these properties, they are generally very expensive to encode and would substantially degrade coding efficiency. It is therefore important to eliminate or suppress such temporal noise in video inputs prior to encoding. The present invention provides a methodology to achieve such a goal in a highly cost-effective manner where coding performance, latency, computational cost, and memory requirements are optimized. This methodology can be efficiently implemented as part of digital video compression algorithm and scales nicely for various bitrates.