Efficient Motion Field Representation in the Wavelet Domain for Video Compression
Xin Shane Li, Shawmin Lei · 2002
It has been widely observed that improved motion field representation (e.g. Fractional-pel [I21 and OBMC [13]) is beneficial to video coding. In this paper, we investigate efficient motion field representation in the wavelet domain. We want to demonstrate that motion estimation in the wavelet domain can: 1) effectively solve the occlusion problem; 2) transform the apenure from a problem into a property that can be exploited in video coding. Our study leads to a novel anisotropic motion field representation in the wavelet domain. Our new wavelet-based motion field offers more flexibility than traditional representations in the spatial domain and opens the door to an improved understanding of relationship between motion and intensity uncertainty model.