SMPTE 2052-0-2013 SMPTE-TT and Format Translation C Roadmap for the 2052 Document Suite.pdf
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1、 Copyright 2013 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved August 14, 2013 1 Document Roadmap SMPTE ST 2052-1, Timed Text Format (SMPTE-TT), specifies a core standard and defines the Timed Text format. SMPTE-TT can be use
2、d in an end-to-end broadband infrastructure as a native format including authoring and rendering. However, existing (legacy) captioning formats exist worldwide that have a large body of captions authored in and/or distributed in their individual syntax. To properly translate those existing caption s
3、yntax formats, individual “Format Translation” documents are created as SMPTE Recommended Practices. SMPTE RP 2052-10, Conversion of CEA-608 Data to SMPTE-TT, describes how the legacy CEA-608 syntax (including analog video waveform) can be mapped into the SMPTE-TT format and SMPTE RP 2052-11, Conver
4、sion of CEA-708 Data to SMPTE-TT, describes how the CEA-708 syntax can be mapped into the SMPTE-TT format. Additional translation documents are envisioned for inclusion in the 2052 “family” of specifications. 2 Scope This document provides context to the 2052 “family” of the core standard and the re
5、lated, optional, format conversion document(s). This document is introductory and does not contain any normative requirements. 2.1 Scope SMPTE ST 2052-1:2013 This Standard defines the SMPTE profile of W3C Timed Text Markup Language (TTML), designated SMPTE-TT, which may represent Captions or Subtitl
6、es. It identifies the features from TTML required for interoperability between display systems for the format. In order to preserve certain semantic features of the input formats, SMPTE-TT also defines some standard metadata terms to be used, and some extension features not found in TTML. 2.2 Scope
7、SMPTE RP 2052-10:2013 This recommended practice document defines the preferred method of converting from CEA-608 data streams to SMPTE-TT (as defined in SMPTE ST 2052-1). This document details how such a conversion can be made, and defines some constraints on the translation process so that the resu
8、lting SMPTE-TT file is interoperable between SMPTE-TT implementations. Page 1 of 5 pages SMPTE 2052-0:2013 Revision of SMPTE 2052-0:2010 SMPTE ROADMAP SMPTE-TT and Format Translation Roadmap for the 2052 Document Suite SMPTE 2052-0:2013 Page 2 of 5 pages 2.3 Scope SMPTE RP 2052-11:2013 This recommen
9、ded practice document defines the preferred method of converting from CEA-708 data streams to SMPTE-TT (as defined in SMPTE ST 2052-1). This document details how such a conversion can be made, and defines some constraints on the translation process so that the resulting SMPTE-TT file is interoperabl
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