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Indexed Captioned Searchable Videos

Indexed Captioned Searchable Videos. Cecilia Y. Chen University of Houston July 11,2012. Introduction. Usage of video to deliver coursework online: commonplace Evidence for video usage: - MIT OpenCourseware , - Apple’s iTunes University - YouTube Edu.

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Indexed Captioned Searchable Videos

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  1. Indexed Captioned Searchable Videos Cecilia Y. Chen University of Houston July 11,2012

  2. Introduction • Usage of video to deliver coursework online: commonplace • Evidence for video usage: - MIT OpenCourseware , - Apple’s iTunes University - YouTube Edu

  3. Classroom lecture videos widely used at University of Houston • Tablet PC recordings

  4. Survey focus group: • Video lectures : powerful and versatile resource • The biggest weakness of the video format : Inability to quickly access the content of interest

  5. ICS Videos • Indexing: Segmented videos • Search: Keyword search in video • Captioning: Scrolling text for audio • Integrated in ICS Video Player • Project Goal: Quick access to video content

  6. Indexing: Finding Transition Points • Indexing : dividing video into segments; • User can start playback from any index frame • Transition Point: is a frame that has changes significantly when compared to another frame.

  7. Image approach: comparing images by pixel to find transition points • Text approach: comparing images using text to find transition points using OCR(Optical Character Recognition)

  8. Image approach vs Text approach

  9. Preliminary Results • There are special cases that is a lot faster to use the text approach • When a video is processed with text comparison at the end the difference in time to process might not be that significant • Most of the time the text comparison will recognize transition points accurately

  10. Resources • Houston, University of. Indexed Captioned Searchable Videos for STEM Courseware. 2009. <http://icsvideos.cs.uh.edu/>. • Tuna T, Subhlok J, Barker L,Shah S, Varghese V, Johnson O. "Development and Evaluation of Indexed Captioned ." (n.d.). • Tuna T, Subhlok J, Shah S. "Indexing and Keyword Search to Ease Navigation ." (n.d.).

  11. Questions

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