To whom correspondence should be addressed. E-mail: snow03129, student@sina. com Gao Xuejuan, born in 1983. She is pursuing her M.S. degree in Signal & Information Processing in De- partment of Electronic & Information Engineering of Beijing University of Technology now. She also received her B.S. degree in Electronic & Information Engineering from Beijing University of Technology in 2006. Her research interests include the video coding and wireless communication, intelligent information processing and so on.