Highly Scalable Differential JPEG-2000 Wavelet Video Codec for

Highly scalable wavelet video codec is proposed for Internet video streaming applications based on the simplified JPEG-2000 compression core. Most of existing video solutions are utilizing fixed temporal grouping structure, resulting in quality degradation due to structural mismatch with inherent motion and scene change. Thus, by adopting the adaptive frame grouping based on the fast scene change detection, a flexible temporal grouping is determined according to the motion activity. To best provide temporal scalability regardless of packet loss, the dependency structure inside a temporal group is simplified by referencing only initial intra-frame for the telescopic motion estimation at the cost of coding efficiency. In addition, the predictive-frames in a temporal group are prioritized according to their relative motion and coding cost. Finally, the joint spatio-temporal scalability support of the proposed video solution is demonstrated in terms of the network adaptation capability