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Xi'an, the eternal city, records the great changes of the Chinese nation just like a living history book. Called Chang'an in ancient times, Xian is one of the birthplaces of the ancient civilization in the Yellow River Basin area of the country. During Xian's 3,100 year development, 13 dynasties such as Western Zhou (11th century BC - 771 BC), Qin (221 BC - 206 BC), Western Han (206 BC - 24 AD) and Tang (618 - 907) placed their capitals here. So far, Xian enjoys equal fame with Athens, Cairo, and Rome as one of the four major ancient civilization capitals. 

The young APSIPA (Asia Pacific Signal and Information Processing Association) will have its third Annual Summit and Conference (APSIPA ASC 2011) in the Golden Season October in Xi'an. Founded in 2009, APSIPA aims to promote research and education on signal processing, information technology and communications. The annual conference was previously held in Japan in 2009 and in Singapore in 2010. The field of interest of APSIPA concerns all aspects of signals and information including processing, recognition, classification, communications, networking, computing, system design, security, implementation, and technology with applications to scientific, engineering, and social areas. Accepted papers in regular sessions and accepted papers in special sessions will be published in APSIPA ASC 2011 proceedings which will be indexed by EI Compendex.

On behalf of the organizing committee, it is with great pleasure that I welcome you to APSIPA ASC 2011 to Xi'an, where YOUNG will meet OLD and MODERN will meet with TRADITIONAL. APSIPA is an association focusing on the Asia Pacific region, where China, called as world economic engine, is located. Xi'an, the geographical center of north-western China, is now becoming an economic, technological and cultural center with rapid growth of economy of China for the last three decades.

Following the success enjoyed by the inaugural ASC held 2009 in Sapporo, Japan, and 2010 in Singapore, APSIPA ASC 2011 will feature student symposiums, panel discussion session (on industry), forum discussion session (on education), together with the customary poster, special and regular sessions, keynote addresses, plenary overviews, as well as tutorial sessions. Since its inception three years ago, APSIPA aims to promote various aspects of research and education in signal processing, information technology as well as communication. In line with this endeavor, APSIPA ASC 2011 will showcase research contributions and technological breakthroughs from diverse fields of signal processing, ranging from graphics and videos to areas in biomedical research and forensics. Over 300 outstanding papers have been received, which were evaluated by a rigorous review and selection process. This resulted in about 30.5% of the papers being accepted for the oral presentation in regular sessions, highlighting our emphasis on a stringent selection process for the assurance of quality in the submissions. These submissions, together with more than 260 registrations from all over the world, allow APSIPA ASC 2011 to demonstrate a unique convergence of remarkable ideas from the various facets of signal and information processing technology.

I would like to express my sincerest gratitude to all contributing authors and convey my heartfelt appreciation to reviewers and participants alike, for their part in what looks to be a highly memorable event. In particular, I gratefully acknowledge the highly commendable efforts of the organizing committee members from the outset of the initial planning stages. Throughout an entire year, they have demonstrated exceptional capabilities in executing their respective tasks which include publicizing the event, inviting renowned speakers, engaging supporting organizations, calling for papers and reviewing them, as well as arranging the eventual technical program; especially when there are many changes to the conference this year the organizing committee members have been working hard to find solutions and finally making everything perfect. The high levels of cohesion and synergy displayed by the committee throughout the entire process must have been truly inspirational for each individual, and these have culminated in a conference program which, in my belief, promises a deeply insightful and thoroughly exciting experience for the benefit, enjoyment, and fulfillment of all.

Welcome to APSIPA ASC 2011. The great technical event as well as the unique Tang Dynasty Style Banquet and the unique Royal Welcome Ceremony are waiting for you.

Thomas Fang Zheng
Tsinghua University,
C.-C. Jay Kuo
University of South California,

Yoshikazu Miyanaga

Hokkaido University,


General Chairs,



Welcome to Xi’an, where modern meets ancient, for the 3nd APSIPA Annual Summit and Conference. This year, we received 349 paper submissions, which created a new record in the APSIPA ASC history. We are happy to notice a healthy growth in signal and information processing research across the Asia-Pacific region in the past years.

This year’s 341 submissions consisted of 213 regular papers, 120 special session papers and 8 overview papers. After peer-review, the technical program committee has accepted 127 out of the 213 regular papers in the main conference, with an oral presentation acceptance rate of 30.5%.

We would like to express our thanks to everyone who submitted their fine work to APSIPA ASC 2011. This year's conference is made possible by the support of many people. Our deepest thanks go to the 35 session chairs, 32 special session organizers and 313 reviewers across the international research community for their dedicated efforts to the success of our conference.

We would like to thank the Special Session Chairs, Alex Kot, Masato Akagi, and Weibin Zhu; Tutorial Chairs, Waleed Abdulla, Jiwu Huang,Koh Soo Ngee; and Forum Chairs, Jhing-Fa Wang, Hitoshi Kiya, Tianling Ren, and Panel Session Chairs Lin-Shan Lee, Jianwu Dang, Mingyi He, Kenneth Lam, for organizing the exciting technical events. We greatly appreciate the timely response and enthusiasm of the technical program committee.

In APSIPA ASC 2011, we have prepared a rich program with 3 distinguished keynotes, 6 comprehensive tutorials, 8 plenary overviews, one education forum, one industrial panel, 35 regular and special sessions, exciting banquet, extraordinary special activities and APSIPA events like general assembly, technical committee meetings and launching of new APSIPA journal. Specifically, we have invited three renowned keynote speakers: Prof. Sadaoki Furui from Japan, Prof. K. J. Ray Liu from USA and Mr. Longming Zhu from China.

We are excited by the comprehensive scientific program. The program reflects a healthy balance of a high standard collection coupled with a wide participation from the Asia Pacific signal and information processing research community. We are looking forward to learning more about their research discoveries during the conference.

Finally, we wish you a happy stay in Xi’an!

Yanning Zhang

Technical Program Co-Chair and Coordinator