HSIN-WEN WEI, WAN-CHEN LU, PEI-CHI HUANG, WEI-KUAN SHIH AND MING-YANG KAO+
Department of Computer Science
National Tsing Hua University
Hsinchu 300, Taiwan
E-mail: {bertha, wanchen, peggy, wshih}@rtlab.cs.nthu.edu.tw
+Department of Electrical Engineering and Computer Science
Northwestern University
Evanston 60208, U.S.A.
E-mail: kao@northwestern.edu