Techniques for Creating Accessible, Closed Captioned WebBased Video

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Techniques for Creating Accessible, Closed
Captioned Web-Based Video
David Klein K. Fritz Thompson

• California State University - Northridge21st
  Annual International Technology and
• Persons with Disabilities Conference
• Los Angeles, California
• March 22, 2007
• http//disability.law.uiowa.edu/lhpdc/publications
  /kleinpubs.html

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Creating Accessible Video

• Basic usability
• Start with video / audio of highest possible
  quality
• Acquire secondary audio source and/or CART
  (real-time caption) file if possible
• Capture, edit and compress video
• 3 output formats .mov, .wmv, and .flv
• Attention to first frame
• Black
• Titling

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Video Compression Examples

• See Compare compression methods link on CD
  index.html file.
• Copy CD to desktop (hold down Option key and drag
  CD icon to a space on the desktop)
• Open the new folder
• Double click index.html

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Tips

• High quality audio makes better movies and better
  transcripts
• Turn off smart quotes, other autocorrect options
  (Word)
• Smart quotes ,
• Curly apostrophes
• Em dash

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Future

• Podcasts See iTunes
• Our Flash video player development
• Customized controls (larger, more accessible)
• More configuration options in external XML file
• Customized formatting within captions
• Speech recognition
• Real-time voice recognition
• Automatic time codes (real-time)
• Searchable / Linkable video
• Use of semantic markup (XHTML) for transcript
  files that can be used to produce caption files
  automatically

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DFXP

• Distribution Format Exchange Profile of the
  timed-text authoring format (TT AF)
• Non-proprietary format from the W3C
• Can be used as a direct distribution/authoring
  format for captions, subtitles or other instances
  of timed text
• Can also be used as a transformation-target
  format (e.g., converting from proprietary
  formats such as SAMI, QTtext, RealText)
• CC for Flash and ccPlayer recognize a subset of
  DFXP
• Currently a candidate recommendation from the W3C

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Contact

• Law, Health Policy Disability Center
• http//disability.law.uiowa.edu/
• LHPDC Bulletin Board
• http//disability2.law.uiowa.edu/bbs

David Klein 280-1 Boyd Law Bldg. College of
Law University of Iowa Iowa City, IA
52242 319-335-6748 david-klein_at_uiowa.edu
K. Fritz Thompson 280-1 Boyd Law Bldg. College
of Law University of Iowa Iowa City, IA
52242 319-335-6748 kenneth-d-thompson_at_uiowa.edu