Professor Chao Xu


School of Electronics Engineering & Computer Science

Peking University

Beijing, 100871,



Tel: 86-10-62757094

Fax: 86-10-62755569

















Chao Xu received the B.E. degree from Tsinghua University in 1988, the M.S. degree from University of Science and Technology of China in 1991 and the Ph.D degree from Institute of Electronics, Chinese Academy of Sciences in 1997.

Between 1991 and 1994 he was employed as an assistant professor by University of Science and Technology of China. Since 1997 Dr. Xu has been with National Laboratory on Machine Perception at Peking University where he is currently a Professor. His research interests are in image and video coding and processing, and pattern recognittion. He has authored or co-authored more than 40 publications and 5 patents in these fields. He has taught course in digital video processing.

Dr. Xu is a member of the IEEE, a senior member of Chinese Institute of Electronics in which he serves as an expert member in DSP application committee. He received the Chinese Academy of Sciences 1993 Award. He was awarded prizes from the Antar Foundation in 1999, the GE Foundation in 2000 and the Kodak Foundation in 2002 for distinguished contributions to education and research in Peking University.



Selected Publications in recent years


Bo Geng, Lin-Jun Yang, Zheng-Jun Zha, Chao Xu, Xian-Sheng Hua, “Collaborative Learning for Image and Video Annotation”, ACM Int. Conf. on Multimedia Information Retrieval, MIR 2008.


Bo Geng, Lin-Jun Yang, Zheng-Jun Zha, Chao Xu, Xian-Sheng Hua, “Unbiased Active Learning for Image Retrieval”, IEEE Int. Conf. on Multimedia & Expo, IEEE ICME 2008.


Bo-Xin Shi, Lin Liu, Chao Xu, “Comparison Between JPEG2000 and H.264 for Digital Cinema”. IEEE Int. Conf. on Multimedia & Expo, ICME 2008.


Yi-Zhen Zhang, Chao Xu, Wen-Tao Wang, Liang-Bin Chen, “Performance Analysis and Architecture Design for Parallel EBCOT Encoder of JPEG2000”, IEEE Trans. Circuits & Systems for Video Technology (CSVT), vol.17, no.10, pp. 1336-1347, 2007.


Chao Xu, Yan-Ju Han, Su-Fang Hu, A Memory-Saving System Including DWT and EC for JPEG2000 Implementation, IEEE Int. Conf. on Image Processing, ICIP 2006, Atlanta, USA, Oct. 2006.


Yi-Zhen Zhang, Chao Xu, Analysis and Effective Parallel Technique for Rate-Distortion Optimization in JPEG2000, IEEE Int. Conf. on Image Processing, ICIP 2006, Atlanta, USA, Oct. 2006.


Wenjia Yuan, Pengwei Hao, Chao Xu, Matrix Factorization for Fast DCT Algorithms, IEEE Int. Conf. on Acaustics, Speech and Signal ProcessingICASSP 2006, Toulouse, France, May 2006.


Yongming Yang, Chao Xu, Fast Wavelet Packet Basis Selection for Block-Partitioning Image Coding, IEEE Int. Symp. on Circuits and SystemsISCAS 2006, Kos, Greece, May 2006.


Xin Fan, Chao Xu, Coefficient, Pass and Code-Block Triple Parallel Architecture for Fractional Bit-plane Coding in JPEG2000, IEEE International Conference on Electronics, Circuits and Systems, ICECS 2006, Nice, France, Dec. 2006.


Yongming Yang, Chao Xu, Fast and Efficient Basis Selection Methods for Embedded Wavelet Packet Image Coding, Int. Conf. on Image Analysis and Recognition, ICIAR 2006, Portugal, Sept. 2006.


Liang-Bin Chen, Yi-Zhen Zhang, Chao Xu,Fully Utilized and Low Memory-bandwidth Architecture Design of Variable Block-size Motion Estimation for H.264/AVC, IEEE Int. Conf. on TENCON, Hong Kong, China, Nov. 2006.


Yi-Zhen Zhang, Chao Xu, Progressive Technique for Rate Distortion Optimization in JPEG2000, IEEE Int. Conf. on APCCAS, Singapore, Dec. 2006. 


Chao Xu, "EBCOT-Based Discrete Wavelet Transform Scheme with Raw-Overlapped Z-scan," IEEE Int. Conf. on Consumer Electronics, (ICCE 2005), Lasvegas, USA, Jan. 2005.


Yi-Zhen Zhang, Chao Xu, "Analysis and high performance parallel architecture design for EBCOT in JPEG2000"IEEE Int. Conf. on Image Processing,(ICIP 2005),GenovaItalySept. 2005.


Yong-Ming Yang, Chao Xu, "A wavelet packet based block-partitioning image coding algorithm with rate-distortion optimization", IEEE Int. Conf. on Image Processing,(ICIP 2005),GenovaItalySept. 2005.


Chao Xu, Yanju Han, Yizhen Zhang, "Bit-plane and pass dual parallel architecture for coefficient bit modeling in JPEG2000", IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2004), Montreal, Canada, May, 2004.


Tony Lin, Peng-Wei Hao, Chao Xu, Ju-fu Feng, "Hybrid image coding for real-time computer screen video transmission", Visual Communications and Image Processing (VCIP 2004), San Jose, California, USA, Jan. 2004, SPIE Vol. 5308, pp. 946-957.


Chao Xu, Xin Fan, YongMing Yang, A simplified zerotree encoder architecture based on texture coding, IASTED International Conference on Signal and Image Processing, Honolulu, USA, Aug. 2003


Chao Xu, Qing-Yun Shi, "An efficient parallel hardware architecture for MPEG-4 zerotree encoder"Int. Sym. on Multi-spectral Image Processing and Pattern Recognition (MIPPR 2003), Beijing, China, Oct. 2003, SPIE, Vol. 5286, pp. 572-576.


Chao Xu, Xin Fan, Yong Ming Yang"A general architecture for zerotree encoder"Int. Conf. on ASIC (ASICON 2003), Beijing, China, Oct. 2003, IEEE Press, pp. 970-973.


Chao Xu, Xin Fan, Yi-Zhen Zhang, "A fast efficient architecture for MPEG-4 zerotree encoder", IEEE Int. Conf. on Multimedia and Expo (ICME 2002), Lausanne, Switzerland, Aug. 2002, Vol. 1, pp. 629-632.


Chao Xu, "Design of Morphological Quasi-Circular Structuring Elements"Int. Conf. on Multimodal Interfaces, (ICMI 1998), Hong-Kong, China, Dec. 1998.


Chao Xu, Zhen-Ming Chai, Shi-Wei Shu, Min-Hui Zhu, "SAR detection of moving targets using approximate wavelet transform and time-frequency analysis", IEEE Int. Symp. On Circuits and Systems (ISCAS 1997), Hong-Kong, China, June 1997, Vol. 4, pp. 2561-2564.