Paper Info
Title
A New Visual Interface for Searching and Navigating Slide-Based Lecture Videos
Abstract
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.
Year
DOI
Venue
2019
10.1109/ICME.2019.00164
2019 IEEE International Conference on Multimedia and Expo (ICME)
Keywords
DocType
ISSN
Lecture videos,slide-based lecture videos,content navigation and browsing
Conference
1945-7871
ISBN
Citations 
PageRank 
978-1-5386-9553-1
0
0.34
References 
Authors
12
5
Name
Order
Citations
PageRank
Baoquan Zhao153.16
Songhua Xu211620.49
Shujin Lin3777.74
Ruomei Wang43520.82
Xiaonan Luo569792.76