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FPWD: TTML Profiles for Internet Media Subtitles and Captions 1.2

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Date: Thu, 28 Nov 2019 11:22:48 +0000
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TTML Profiles for Internet Media Subtitles and Captions 1.2

https://www.w3.org/TR/2019/WD-ttml-imsc1.2-20191128/

Abstract

This specification defines two profiles of [ttml2]: a text-only profile and an image-only profile. These profiles are intended to be used across subtitle and caption delivery applications worldwide, thereby simplifying interoperability, consistent rendering and conversion to other subtitling and captioning formats. 

This specification improves on [ttml-imsc1.1] by supporting contemporary practices, while retaining compatibility with [ttml-imsc1.1] documents. Relative to [ttml-imsc1.1], any addition or deprecation of features are summarized at Appendix ยง L. Summary of substantive changes. 

It is feasible to create documents that simultaneously conform to both [ttml10-sdp-us] and the text-only profile. 

The specification defines extensions to [ttml2], as well as incorporates extensions specified in [SMPTE2052-1] and [EBU-TT-D]. 

Both profiles are based on [SUBM].

Status of the Document

This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at https://www.w3.org/TR/.

This document was published by the Timed Text Working Group as a First Public Working Draft. This document is intended to become a W3C Recommendation.

GitHub Issues are preferred for discussion of this specification. Alternatively, you can send comments to our mailing list. Please send them to public-tt@w3.org (archives) with [imsc] at the start of your email&#x27;s subject . 

Publication as a First Public Working Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.

This document was produced by a group operating under the W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.

This document is governed by the 1 March 2019 W3C Process Document.
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