This document provides context to the 2052 “family” of the core standard and the related, optional, format conversion document(s). This document is introductory and does not contain any normative requirements. (2.1) Scope — SMPTE ST 2052-1:2010 This Standard defines the SMPTE profile of W3C Timed Text Markup Language (TTML), designated SMPTE-TT, which may represent Captions or Subtitles. It identi...