Shuji YAMAMURA,
Akira HIRAI,
Mitsuru SATO,
Masao YAMAMOTO,
Akira NARUSE,
and Kouichi KUMON
Fujitsu Laboratories LTD
4-1-1, Kami-Kodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa-pref, Japan 211-8588
{yamamura, ahirai, msato, masao, naruse,
kumon}@flab.fujitsu.co.jp