Recently, many universities have started Web delivery of lecture movies. To retrieve such movies, metadata are indispensable. But, manual extraction of metadata is difficult, if the number of movies is large. Therefore, retrieval method by synchronizing lecture movies and slides based on spatial frequency features is proposed in this paper. In the proposed method, at first, synchronization between lecture movies and slides is carried out. Then, text retrieval of lecture movies is realized using text information described in slides. Experimental results revealed that the accuracy of the synchronization between lecture movies and slides using the proposed method is 99.9%.
