发明名称 |
METHOD AND DEVICE FOR MOTION VECTOR PREDICTION IN VIDEO TRANSCODING USING FULL RESOLUTION RESIDUALS |
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 (w i) 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 (w i). |
申请公布号 |
CA2727119(A1) |
申请公布日期 |
2011.07.08 |
申请号 |
CA20112727119 |
申请日期 |
2011.01.07 |
申请人 |
RESEARCH IN MOTION LIMITED |
发明人 |
SHI, XUN;YU, XIANG;HE, DAKE |
分类号 |
H04N7/50;H04N7/01;H04N21/2662 |
主分类号 |
H04N7/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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