MPTF/MPTF Discussions/Timed Text
From Web and TV IG
Tracker Issue ID: ISSUE-33
The content provider is able to identify temporal regions for display of textual data with the video playback. Two important applications of timed text are:
- Closed captions
- Need textual information for hearing-impaired viewers or speakers of different languages.
- Closed captioning information may need to be transmitted using existing government-mandated television standards.
- Accessibility for different language speakers is desirable.
What needs to be standardized
Timed text tracks currently support track kinds of caption and subtitle
- Track elements are expected to only appear at the beginning of a media stream. Track elements will come and go if the media stream is scheduled programming to there needs to be way to account for this.