发明授权
US08315310B2 Method and device for motion vector prediction in video transcoding using full resolution residuals
有权
使用全分辨率残差的视频转码中运动矢量预测的方法和装置
- 专利标题： Method and device for motion vector prediction in video transcoding using full resolution residuals
- 专利标题（中）： 使用全分辨率残差的视频转码中运动矢量预测的方法和装置
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申请号： US12684219申请日： 2010-01-08
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公开(公告)号： US08315310B2公开(公告)日： 2012-11-20
- 发明人: Xun Shi , Xiang Yu , Dake He
- 申请人： Xun Shi , Xiang Yu , Dake He
- 申请人地址： CA Waterloo, Ontario
- 专利权人： Research In Motion Limited
- 当前专利权人： Research In Motion Limited
- 当前专利权人地址： CA Waterloo, Ontario
- 代理机构： Rowand Intellectual Property Law
- 主分类号： H04B1/66
- IPC分类号： H04B1/66 ; H04N5/14
摘要：
A transcoder and methods of encoding inter-prediction frames of a downsampled video wherein the downsampled video is a spatially downsampled version of a full-resolution video. Full-resolution motion vectors are downscaled and a weighting factor is calculated for each downscaled motion vector based upon the transform domain residual coefficients associated with that full-resolution motion vector. A motion vector prediction is made based on the weighted average using the downscaled motion vectors and their weighting factors.
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