DE: Comments on 7.1.4 Captions characteristics (Tab 7, Item 4, row 5)
Submitted on behalf of Digital Europe as part of #55.
7.1.4 Captions characteristics
"Where ICT displays captions, it shall provide a way for the user to adapt the displayed characteristics of captions to their individual requirements, except where the captions are displayed as unmodifiable characters.
NOTE 1: Defining the background and foreground colour of subtitles, font type, size opacity of the background box of subtitles, and the contour or border of the fonts can contribute to meeting this requirement.
NOTE 2: Subtitles that are bitmap images are examples of unmodifiable characters.
NOTE 3: Subtitles that contain formatting information provided by the broadcaster (which may convey meaning as mentioned in 7.1.3) are examples of unmodifiable characters."
DE Comments:
This is not generally possible in European TVs. It is even against the philosophy of European standards, where the broadcaster controls the formatting and "artistic intent" of the subtitles.
Not possible for DVB subtitles. (note 2)
Technically possible for TTML subtitles.
Also depends on app support for app-based content.