He was the guest editor for the special issue on Intelligent Signal Processing in Communications, IEEE Journal on Selected Areas in Communications, Dec. 94 and Jan. 95. He served in various positions of IEEE Communications Society, inducing regional chairman for Asia Pacific (1994-1995), member of the Board of Governors (1994-1997), Vice President for International Affairs (1996-1997) and the Awards Committee chair (1998-1999). He was the general co-chair of IEEE Symposium on Personal, Indoor and Mobile Radio Communications 1996 (PIMRC'96) at Taipei, and the Technical Program Chair of IEEE Global Telecommunications Conference (Globecom) 2002 at Taipei.
He developed quite several earliest versions of Chinese spoken language processing system in the world, including text-to-speech system (1984), natural language analyzer (1986), dictation systems(1991 and 1993 for isolated syllable input, 1995 for continuous speech input), speech-based information retrieval system (1997), and spoken dialogue system (1998). He was the guest editor for the special issue on Speech Recognition for Different Languages, International Journal of Pattern Recognition and Artificial Intelligence, Feb. 1994. He has been a member of the Permanent Council of International Conference on Spoken Language Processing(ICSLP) since 1994, and is the Vice Chair of Technical Program Committee of the conference in year 2000 at Beijing. He was the convenor of COCOSDA (International COordinating COmmittee for Speech Databases and Assessment) 2000-2001, and elected as a Board member of International Speech Communication Association (ISCA) since 2001.
He received about 11 patents, and authored about 65 papers in international journals and 168 papers in international conferences. He was elected IEEE Fellow in 1992 with citation, "For Contributions to Computer Voice Input/Output Techniques for Mandarin Chinese and Engineering Education". He is the recipient of the Medal for Distinguished Contributions in Electrical Engineering sponsored by the Chinese Institute of Electrical Engineers at Taipei in 1991, and the Award for Distinguished Academic Contributions in Engineering sponsored by the Ministry of Education of Taiwan, Republic of China in 1993.