JUNG-SHIONG CHANG, ARTHUR CHUN-CHIEH SHIH+, HSIAO-RONG TYAN++ AND WEN-HSIEN FANG
Department of Electronic Engineering
National Taiwan University of Science and Technology
Taipei, 106 Taiwan
+Institute of Information Science
Academia Sinica
Taipei, 115 Taiwan
++Department of Information and Computer Engineering
Chung Yuan Christian University
Chungli, 320 Taiwan