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SMIL 2.0
User Agent and Assistive Technology Support Notes
This technique relates to:
The objective of this technique is to provide a way for people who are deaf or otherwise have trouble hearing the dialog in audio visual material to be able to view the material. With this technique all of the dialog and important sounds are available in a sign-language interpretation video that is displayed in a caption area.
With SMIL 2.0, separate regions can be defined for the two videos. The two video playbacks are synchronized, with the content video displayed in one region of the screen, while the corresponding sign-language interpretation video is displayed in another region.
<smil xmlns="//www.w3.org/2001/SMIL20/Language"> <head> <layout> <root-layout backgroundColor="black" height="310" width="330"/> <region id="video" backgroundColor="black" top="5" left="5" height="240" width="320"/> <region id="signing" backgroundColor="black" top="250" height="60" left="5" width="320"/> </layout> </head> <body> <par> <video src="salesdemo.mpg" region="video" title="Sales Demo" alt="Sales Demo"/> <video src="salesdemo_signing.mpg" region="signing" systemCaptions="on" title="sign language interpretation" alt="Sales Demo Sign Language Interpretation"/> </par> </body> </smil>
The example shows a <par>
segment containing
two <video>
tags. The systemCaptions
attribute indicates that the sign language video should be displayed
when the user's player setting for captions indicates the preference
for captions to be displayed. The <layout>
section defines the regions used for the main video and the sign
language interpretation video.
Resources are for information purposes only, no endorsement implied.
Enable control in content or player to turn on sign language interpretation (unless it is always shown)
Play file with sign-language interpretation
Check whether sign language interpretation is displayed
#3 is true