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1. 发明授权

US06888891B2 Wavelet domain half-pixel motion compensation 失效
标题翻译：小波域半像素运动补偿
公开(公告)号：US06888891B2
公开(公告)日：2005-05-03
申请号：US10043363
申请日：2002-01-09
申请人： Fredrick Chang-Ching Lee , Jonason Che-Cheng Chang
发明人： Fredrick Chang-Ching Lee , Jonason Che-Cheng Chang
IPC分类号： H04N7/30 , G06T9/00 , H03M7/30 , H04N7/26 , H04N7/32 , H04N7/12
CPC分类号： H04N19/547 , H04N19/523 , H04N19/61 , H04N19/619 , H04N19/63 , H04N19/645
摘要： A wavelet domain half-pixel motion compensation process that reduces aliasing effects that down sampling causes in the wavelet transform uses an H-transform and provides motion estimation and compensation in wavelet domain without requiring an inverse wavelet transform. For encoding, a q-dimensional (e.g., q=2) H-transform is applied in a conventional manner to non-overlapping q×q matrices in a first frame. When determining motion vectors for a second frame, “half-pixel” interpolation of the wavelet data of the first frame determines generates half-pixel data corresponding to q×q space-domain matrices that are offset (e.g., 1 pixel) horizontally and/or vertically from the q×q matrices that were transformed. Motion estimation techniques can then identify object motion by comparing wavelet domain object data in one frame to actual and interpolated wavelet domain data for another frame. Half-pixel interpolation or data generation can be combined with multi-resolution motion estimation in a high-performance wavelet video encoder.
摘要翻译：小波域半像素运动补偿过程减少了小波变换中的下采样造成的混叠效应，使用H变换，并且在小波域中提供运动估计和补偿，而不需要逆小波变换。对于编码，以常规方式将q维（例如，q = 2）H变换应用于第一帧中的非重叠qxq矩阵。当确定第二帧的运动矢量时，第一帧的小波数据的“半像素”插值确定产生对应于水平和/或垂直偏移（例如，1像素）的qxq空间域矩阵的半像素数据从被转换的qxq矩阵。运动估计技术可以通过将一帧中的小波域对象数据与另一帧的实际和内插小波域数据进行比较来识别对象运动。半像素内插或数据生成可以与高性能小波视频编码器中的多分辨率运动估计相结合。

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