[AVTCORE] AD review of draft-ietf-payload-rtp-ttml-02

[Barry Leiba <[e-mail]>]

Nicely written, and I have little to say.  My comments are minor, and can
be handled along with any other last-call comments; I will request last
call as soon as I’ve sent this note.


— Section 4.1 —


      Note that the length of data

      words will depend on the character encoding used (e.g. 8 bit words

      for UTF-8, 16 bit words for UTF-16).


A reader could be confused by “length of data words” here.  I suggest this:


NEW

      Note that the length of each data

      word depends on the character encoding used: for UTF-8 a word

      is 8 bits, while it is 16 bits for UTF-16.


— Section 4.2 —


   Documents carried in User Data Words are encoded in accordance with

   one of the defined TTML profiles specified in its registry

   [TTML-MTPR].


The antecedent to “its” isn’t clear; I suggest “in the TTML registry”.
(You might, then, even make it, “one of the defined profiles in the TTML
registry [TTML-MTPR].”)

Barry