发明授权
EP1949699B1 TWO PASS RATE CONTROL TECHNIQUES FOR VIDEO CODING USING RATE-DISTORTION CHARACTERISTICS
有权
与两率控制技术通行证视频编码利用率失真特性
- 专利标题： TWO PASS RATE CONTROL TECHNIQUES FOR VIDEO CODING USING RATE-DISTORTION CHARACTERISTICS
- 专利标题（中）： 与两率控制技术通行证视频编码利用率失真特性
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申请号： EP06804008.8申请日： 2006-09-21
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公开(公告)号： EP1949699B1公开(公告)日： 2011-09-21
- 发明人: WANG, Haohong , MALAYATH, Narendranath
- 申请人： QUALCOMM Incorporated
- 申请人地址： 5775 Morehouse Drive San Diego, CA 92121 US
- 专利权人： QUALCOMM Incorporated
- 当前专利权人： QUALCOMM Incorporated
- 当前专利权人地址： 5775 Morehouse Drive San Diego, CA 92121 US
- 代理机构： Heselberger, Johannes
- 优先权： US719775P 20050922; US303617 20051215
- 国际公布： WO2007038230 20070405
- 主分类号： H04N7/26
- IPC分类号： H04N7/26
摘要：
This disclosure describes rate control techniques that can improve video coding based on a 'two-pass' approach. The first pass codes a video sequence using a first set of quantization parameters (QPs) for the purpose of estimating rate-distortion characteristics of the video sequence based on the statistics of the first pass. A second set of QPs can then be defined for a second coding pass. The estimated rate-distortion characteristics of the first pass are used to select QPs for the second pass in a manner that minimizes distortion of the frames of the video sequence.
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