Techniques for Creating Accessible, Closed Captioned Web-Based Video
California State University - Northridge
21st Annual International Technology and 
Persons with Disabilities Conference

Los Angeles, California
March 22, 2007

http://disability.law.uiowa.edu/lhpdc/publications/kleinpubs.html
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
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
Tips
•	High quality audio makes better movies and better transcripts
•	Turn off smart quotes, other autocorrect options (Word)
•	Smart quotes “ ”, ‘ ’ 
•	Curly apostrophes ‘
•	Em dash — 

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

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
Contact
•	Law, Health Policy & Disability Center
•	http://disability.law.uiowa.edu/ 

•	LHPDC Bulletin Board
•	http://disability2.law.uiowa.edu/bbs