Accessibility/TimedText: Difference between revisions
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[http://www.w3.org/TR/2006/CR-ttaf1-dfxp-20061116/ W3C TimedText] | == Resources relating to [http://www.w3.org/TR/2006/CR-ttaf1-dfxp-20061116/ W3C TimedText] == | ||
* [http://www.w3.org/TR/2003/WD-tt-af-1-0-req-20030915/ comprehensive requirements] | * [http://www.w3.org/TR/2003/WD-tt-af-1-0-req-20030915/ comprehensive requirements] | ||
* [http://www.w3.org/TR/2006/CR-ttaf1-dfxp-20061116/#requirements DFXP satisfied requirements] | * [http://www.w3.org/TR/2006/CR-ttaf1-dfxp-20061116/#requirements DFXP satisfied requirements] | ||
* [http://www.3gpp.org/ftp/Specs/archive/26_series/26.245/26245-700.zip 3GPP Timed Text] | |||
== Interesting Features == | |||
=== DFXP === | |||
=== 3GPP TimedText === | |||
This specification defines the subpart of the DFXP authoring language that is supported on 3GPP and how it maps into the 3GPP file format. | |||
* each timed text track defines a region with width, height, translation | |||
* within the region is defined a text box set into which captions are rendered | |||
* styling is applied to the region and/or the text box(es) | |||
* there is a "layer" value that decides between timed text tracks and video tracks the order of display layers | |||
* i18n is achieved with language spec, writing direction, and character set support | |||
* marquee-scrolling (ticker scrolling) is defined through scroll-in, scroll-out, scroll-delay attributes, scroll speed depends on the duration of this text segment | |||
* dynamic highlighting as in Karaoke or Closed Captions is mentioned | |||
* soft text wrap from line to line is supported to fit text within a text box | |||
* media mapping is defined for MPEG-4 | |||
Revision as of 23:49, 15 October 2008
Resources relating to W3C TimedText
Interesting Features
DFXP
3GPP TimedText
This specification defines the subpart of the DFXP authoring language that is supported on 3GPP and how it maps into the 3GPP file format.
- each timed text track defines a region with width, height, translation
- within the region is defined a text box set into which captions are rendered
- styling is applied to the region and/or the text box(es)
- there is a "layer" value that decides between timed text tracks and video tracks the order of display layers
- i18n is achieved with language spec, writing direction, and character set support
- marquee-scrolling (ticker scrolling) is defined through scroll-in, scroll-out, scroll-delay attributes, scroll speed depends on the duration of this text segment
- dynamic highlighting as in Karaoke or Closed Captions is mentioned
- soft text wrap from line to line is supported to fit text within a text box
- media mapping is defined for MPEG-4