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WMA

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WMA: A Marking-Based Synchronized Multimedia Tutoring System for English Composition Studies By Herng-Yow Chen and Kuo-Yu Liu Presented by Brett Lilley – PowerPoint PPT presentation

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Title: WMA


1
WMA A Marking-Based Synchronized
Multimedia Tutoring System for English
Composition Studies By Herng-Yow Chen and Kuo-Yu
Liu Presented by Brett Lilley
2
Evolution of the Web
  • Hypertext
  • Document with hyperlinks to other documents
  • Content-based
  • Hypermedia
  • Hypertext with graphics, audio, video
  • Time-based

3
Problem Statement
  • Creation of hypermedia presentations for
  • educational use.
  • Focus on correcting English Composition

4
Creating Hypermedia
  • Authoring
  • Media Correlation
  • Publishing
  • Integration

5
Better Educational Solution Presentation
Recording
  • eClass
  • Authoring on the Fly

6
Web-Based Multimedia Annotation (WMA) System
  • Enable students to submit writing via the Web
  • Capture speech instructions
  • Capture the navigation events
  • Hot Keys
  • Mouse Operations
  • Ensure synchronized presentation with automatic
    navigation features
  • Enable random access throughout the hypermedia
    document

7
Inter-Media Relationships
8
System Architecture
9
(No Transcript)
10
Temporal Correlation
  • Discrete Media
  • Navigation Events
  • Continuous Media
  • Speech
  • Random Access Between the Two

11
Spatial Correlation
12
Spatial Correlation Free-Form Handwriting
13
Spatial Correlation Free-Form Handwriting Problem
14
Adaptable Handwriting Presentation
15
Spatial Correlation Tele-Pointer
  • Discussion Clues
  • Capturing/Storing Issues

16
Tele-Pointer Movement Interpolation
  • Interpolation Smoothing Algorithm
  • Number of Interpolated Pointers
  • Distance Interval
  • Timestamp and Positions
  • Time Interval - Crucial

17
Content Correlation Undo And Random Access
18
Speech-Event Binding
19
Undo Facilitation
  • Timestamps of events do not match speech stream
    timestamps
  • Recording is contiguous cannot delete
    on-the-fly
  • Delete during speech-event binding

20
Experimental ResultsClustering Speech Turns
21
Experimental Results Random Visual Event Access
22
Experimental ResultsUndo Functionality
  • Compare Against Manually-Created Speech Segments
  • 71 Match Lower than Random Access

23
Experimental ResultsTele-Pointer Interpolation
  • Interviewed 20 Students
  • gt80 ms Decreased Fluidity and Sickness
  • 50 ms Used in WMA

24
Experimental Results User Study
  • When Spring 2006
  • Where Computer Science and Information
    Engineering at Chi Nan University
  • Who 2 instructors, 27 Ph.D. students, 25
    graduate students

25
Survey Results
  • Favorable reactions to perceived usefulness of
    WMA
  • Integration of emerging technologies for learning
    is attractive to students
  • Favorable reaction to design and features.

26
Pre- and Post-Test Results
27
Conclusion
  • Overall system evaluation is good for practical
    applications
  • Learners get what they put in
  • Improvements can be made by customizing the
    Speech-Event Binding process

28
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