Min Xu Jiaming Li Liang-Tien Chia Yiqun Hu Bu-Sung Lee Deepu Rajan Jesse S. Jin Event on demand with MPEG-21 video adaptation system. 921-930 2006 conf/mm/2006 ACM Multimedia http://doi.acm.org/10.1145/1180639.1180843 db/conf/mm/mm2006.html#XuLCHLRJ06