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Re: Transcription/captioning

for

From: John E Brandt
Date: Apr 13, 2011 1:24PM

Yes, we want closed captions rather than open captions.



I always get open vs. closed captioning mixed up, so I have bookmarked this
page as a reminder:

What is the difference between open and closed captioning?

http://www.washington.edu/accessit/articles?50



To quote:

"Despite the advantages of open captions, there also are disadvantages. Some
disadvantages stem from the fact that open captions are an actual part of
the video stream, whereas closed captions exist as a separate text stream.
If captions are preserved as text, users potentially can archive and index
video content and allow users to search for specific video content within
these archives; this ability is lost with open captions. Also, open
captions, unlike closed captions, are subject to loss of quality when the
encoded video is compressed."



Open Captions are part of the video and cannot be indexed. Example: old
movies with subtitles.

Closed Captions are in a separate file and can be indexed.



~j



John E. Brandt

<http://www.jebswebs.com>; www.jebswebs.com
<mailto: <EMAIL REMOVED> > <EMAIL REMOVED>

207-622-7937

Augusta, Maine, USA



From: Morin, Gary (NIH/OD) [E] [mailto: <EMAIL REMOVED> ]
Sent: Wednesday, April 13, 2011 3:07 PM
To: 'WebAIM Discussion List'
Cc: ' <EMAIL REMOVED> '
Subject: RE: [WebAIM] Transcription/captioning



Hi, John/Jeb - in the following comment, are you suggesting closed
captioning as opposed to open captioning or as opposed to not captioning?
Are Open Captions not text searchable?



* One last comment. I would recommend everyone *close caption* all of
their videos that are going to be posted on line. The accessibility issues
are obviously the primary reason, but there is an added value - closed
caption files are searchable. By adding the captioning to your videos, you
make the content accessible and usable to a very wide audience including
Google bots.





Gary M.