TY - GEN
T1 - A new visual interface for searching and navigating slide-based lecture videos
AU - Zhao, Baoquan
AU - Xu, Songhua
AU - Lin, Shujin
AU - Wang, Ruomei
AU - Luo, Xiaonan
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - The rapid development of distance education technologies, e.g. MOOCs, provide learners unprecedented access to high-quality online lecture videos at scale, anytime and anywhere. Unfortunately, these valuable resources are often underutilized by online learners. One prevailing reason is the lack of support for and the resulting difficulty of exploring and locating content of interest among lengthy recordings of course lectures. To address this deficiency, we introduce a novel visual interface that supports efficient search and navigation of video content at fine granularities and with rich semantic clues. The interface is particularly designed for slide-based lecture videos (SBLV), which represent a significant portion of online lecture videos. The interface comprehensively derives versatile semantic clues for video content indexing and visual aid generation according to visual elements, text, and mathematical expressions included on lecture slides, speeches recorded, as well as mouse and cursor pointing actions captured during a lecture. Empowered by such semantically revealing indices and visual assistance, the interface is able to noticeably enhance online learners' capabilities in searching and browsing of content in need from SBLVs. The advantages of the new interface are demonstrated through benchmarked experimental results in comparison with peer methods.
AB - The rapid development of distance education technologies, e.g. MOOCs, provide learners unprecedented access to high-quality online lecture videos at scale, anytime and anywhere. Unfortunately, these valuable resources are often underutilized by online learners. One prevailing reason is the lack of support for and the resulting difficulty of exploring and locating content of interest among lengthy recordings of course lectures. To address this deficiency, we introduce a novel visual interface that supports efficient search and navigation of video content at fine granularities and with rich semantic clues. The interface is particularly designed for slide-based lecture videos (SBLV), which represent a significant portion of online lecture videos. The interface comprehensively derives versatile semantic clues for video content indexing and visual aid generation according to visual elements, text, and mathematical expressions included on lecture slides, speeches recorded, as well as mouse and cursor pointing actions captured during a lecture. Empowered by such semantically revealing indices and visual assistance, the interface is able to noticeably enhance online learners' capabilities in searching and browsing of content in need from SBLVs. The advantages of the new interface are demonstrated through benchmarked experimental results in comparison with peer methods.
KW - Content navigation and browsing
KW - Lecture videos
KW - Slide-based lecture videos
UR - https://www.scopus.com/pages/publications/85070996651
U2 - 10.1109/ICME.2019.00164
DO - 10.1109/ICME.2019.00164
M3 - 会议稿件
AN - SCOPUS:85070996651
T3 - Proceedings - IEEE International Conference on Multimedia and Expo
SP - 928
EP - 933
BT - Proceedings - 2019 IEEE International Conference on Multimedia and Expo, ICME 2019
PB - IEEE Computer Society
T2 - 2019 IEEE International Conference on Multimedia and Expo, ICME 2019
Y2 - 8 July 2019 through 12 July 2019
ER -