Such time values are hereafter called inner-event time values. R1: It shall be possible to associate time values with words/spans of characters of a timed text event without affecting their visibility (as would be done with a begin attribute on a ‘p’ or ‘span’ element). These requirements are applicable to TTML and IMSC. requirements on how styles can be applied for rendering on clients.requirements to add more semantics in the document, that can be processed independently of the styles, which may or may not be present the document. The emphasis behavior and style is constant within a document.Īdditional transitions can be applied before/after/between timed text events.Įxamples of Karaoke can be found on YouTube where the text is burned in the video: Moana, or Frozen. The emphasis can be constant or be continuous with transitions within a word or from word to word. The emphasis can be of different types: using a different text color or placing a (bouncing) dot or image on the current word being sung. Karaoke is a well-known timed text application: song lyrics are displayed on top of a corresponding video clip, with timed emphasis on the words or characters to indicate to the viewer which words/characters have been sung, are being sung or will be sung.
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