Hongliang Bai Jun Sun 0004 Satoshi Naoi Yutaka Katsuyama Yoshinobu Hotta Katsuhito Fujimoto Video caption duration extraction. 1-4 2008 ICPR http://dx.doi.org/10.1109/ICPR.2008.4761671 conf/icpr/2008 db/conf/icpr/icpr2008.html#BaiSNKHF08