Chitra Dorai Ruud M. Bolle Nevenka Dimitrova Lalitha Agnihotri Gang Wei On the evolution of videotext description scheme and its validation experiments for MPEG-7. 67-70 2000 conf/mm/2000w ACM Multimedia Workshops http://doi.acm.org/10.1145/357744.357762 db/conf/mm/mm2000w.html#DoraiBDAW00