Re: Re: TTML and aspect ratio

>btw, SDP-US goes beyond TTML and specifies requirements regarding the
>relationship between the root container region and the related media
>object, see R0016 and R0017 [1]

There is a requirement that the root container must encompass the entire video window.  For a 16x9 video window, <ttpCellResolution="32,15"> would result in caption area that is stretched horizontally.  

R0016 - A presentation processor must fix the root container origin so that it corresponds with the top, left corner of the related media object [TTML10SE], Section 2.2.
R0017 - A presentation processor must fix the root container extent so that it corresponds with the extent of the related media object [TTML10SE], Section 2.2.

Received on Thursday, 31 January 2013 14:53:08 UTC