6 CONCLUSION AND FUTURE WORK
In this paper, we presented an approach for content-based
lecture video indexing and retrieval in large lecture video
archives. In order to verify the research hypothesis we
apply visual as well as audio resource of lecture videos for
extracting content-based metadata automatically. Several
novel indexing features have been developed in a large lecture
video portal by using those metadata and a user study
has been conducted.
As the future work, the usability and utility study for the
video search function in our lecture video portal will be conducted.
Automated annotation for OCR and ASR results
using Linked Open Data resources offers the opportunity to
enhance the amount of linked educational resources significantly.
Therefore more efficient search and recommendation
method could be developed in lecture video archives.