发明授权
US08451896B2 Method and apparatus for adaptive quantization in digital video coding
有权
数字视频编码中自适应量化的方法和装置
- 专利标题： Method and apparatus for adaptive quantization in digital video coding
- 专利标题（中）： 数字视频编码中自适应量化的方法和装置
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申请号： US12581316申请日： 2009-10-19
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公开(公告)号： US08451896B2公开(公告)日： 2013-05-28
- 发明人: Chi Keung Fong , Wai Kuen Cham , Ka Man Cheng , Yu Liu
- 申请人： Chi Keung Fong , Wai Kuen Cham , Ka Man Cheng , Yu Liu
- 申请人地址： CN Hong Kong Science Park, Shatin, New Territories, Hong Kong
- 专利权人： Hong Kong Applied Science and Technology Research Institute Company Limited
- 当前专利权人： Hong Kong Applied Science and Technology Research Institute Company Limited
- 当前专利权人地址： CN Hong Kong Science Park, Shatin, New Territories, Hong Kong
- 代理机构： Ella Cheong Hong Kong
- 代理商 Sam T. Yip
- 主分类号： H04N7/12
- IPC分类号： H04N7/12 ; H04N7/50
摘要：
The invention relates to adjusting the quantization parameter in digital video coding. A shift value (QP Shift) is used to adjust the quantization parameter. The shift value is determined in a determining step 101. The video nature is determined and compared with a threshold in a comparing step 102 to adjust the shift value adaptively according to the frame type in an adjusting step 103. The shift value shifts the quantization parameter in a shifting step 104.