Draft Liaison Letters VR-IF and MPEG (Subtitles in XR)

Dear all,

 

Find below the proposed text for the liaison letters to MPEG and VR-IF. If
you have any comments or objections please send them to the public
reflector. We plan to submit the letters on Monday or latest early Tuesday
EST.

 

Thanks and best regards,

Andreas

 

 

[[

Dear RECIPIENT,

 

The W3C Timed Text Working Group has decided to address the requirement of
how to refer to TTML subtitles in a 3D environment [1]. The driver for this
requirement is the use of TTML in immersive environments (especially in 360°
videos).

 

Standards and guidelines to address this requirement exist already, and W3C
takes note of the specification text in ISO/IEC 23090-2 Information
technology -- Coded representation of immersive media -- Part 2:
Omnidirectional media format [2].

 

W3C would like to understand how the use case of presenting subtitles in 3D
has been solved by the MPEG group. It would be helpful to get a pointer to
the requirements and use cases as well as specification text related to
subtitles in OMAF and MPEG.

 

Best regards,

 

[1] https://github.com/w3c/tt-reqs/issues/8

[2] https://www.iso.org/standard/73310.html

 

]]

 

[[

Dear RECIPIENT,

 

The W3C Timed Text Working Group has decided to address the requirement how
to refer to TTML subtitles in a 3D environment. The driver for this
requirement is the use of TTML in immersive environments (especially 360° in
videos).

 

Some standards and guidelines to address this requirement exists already.
One of these standards is the VR-IF Guideline by the VR Industry Forum [2].

 

We like to understand the VR-IF recommendations how to present subtitles in
3D and how the Timed Text Working Goup can contribute with an addition to
the TTML standard.

 

We propose to establish a liaison with the VR Industry Forum to align our
standards efforts. As part of this liaison we see also the exchange of
documents and drafts.

 

Best regards,

 

[1] https://github.com/w3c/tt-reqs/issues/8

[2]
https://www.vr-if.org/wp-content/uploads/vrif2018.110.04-Guidelines-2.0-for-
Community-Review-1.pdf

 

]]

 

------------------------------------------------

Andreas Tai

Production Systems Television 

 

Phone: +49 89 32399-389 | Fax: +49 89 32399-200

http: www.irt.de | Email: tai@irt.de

------------------------------------------------

IRT - Institut fuer Rundfunktechnik GmbH

R&D Institute of ARD, ZDF, DRadio, ORF and SRG/SSR

Floriansmuehlstrasse 60 

D-80939 Munich

Germany

------------------------------------------------

registration court&  managing director:

Munich Commercial, RegNo. B 5191

Michael Hagemeyer

------------------------------------------------