Discussion:
* same as transcript
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==== ticker text ====
* news often have a ticker text at the bottom of the screen
* ticker text always stays at the same position and scrolls through from left to right
* the ticker text often has small ads in it, too
* there are often graphics included
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==== image maps ====
* advertisers in particular want to mark regions on online video with hyperlinks and some scroll-over text, which is linked to the region
* there is the active region and there is the region for the scroll-over text
* there can be text & graphics in the scroll-over text box
* can be placed anywhere on top of the video screen
* the active region is typically empty and lights up upon scroll-over
MULTIPLEX INTO OGG: as timed text track