[1] Digital Media Lab., Daewoo Electronics Corp., 543, Dangjeong, Kunpo, Kyonggi 435-733, Korea, Republic of
[2] Education Research Industry Cluster, Hanyang University, 1271 Sa-1, Sangrok, Ansan, Kyonggi 426-791, Korea, Republic of
[3] School of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Shinlim., Kwanak, Seoul 151-742, Korea, Republic of