Meeting minutes
MEIG Charter
cpn: has just been approved
… for 1 Nov 2023 to 31 October 2025
… no significant changes
… using the latest template, and updated list of coordination groups
… mainly maintenance
Igarashi: If the group has a goal to produce use cases and requirements, we should include the deliverables in the charter
… put requirements in to existing WGs or create new CGs
DVB liaison
cpn: tx for your inputs
… one from Timed Text WG focusing on subtitles
… and then combined response from MEIG/APA
… note that we don't have DVB on our official liaison list yet
… we're waiting Andreas to work within the DVB side
Upcoming events
DASH-IF on MoQ
Chris: upcoming DASH-IF call on MoQ, W3C participants invited to join
cpn: Friday, 1 Dec 2023 at 16 UTC
… what does "Media over QUIC" means
igarashi: what I learned about that
Chris: it will define the payload format for media, ISO BMFF and CMAF
… they'll define a more lightweight payload format for codec layer
… Implication for W3C might be, for example, WebCodecs API might change if the API direclty accepts the payload format
… Or if JavaScript retrieves media data from that format
… Also, could think of extension to MSE to receive that payload format
<tidoust> [Also see the WebCodecs MoQ Media Format discussion within the Media WG during TPAC: https://
Chris: We did discuss at TPAC about WebCodecs container format, there was a breakout session
… And a question there was whether to specify that in IETF or in W3C
… IETF meets this week, so would be interesting to know how that conversation has moved on
<tidoust> [WebCodecs Serialization Format TPAC breakout at https://
Chris: This would be a Media WG topic
Francois: Also, Open Screen Protocol, which transports media over QUIC, so there's another overlap there
Chris: It's good that DASH-IF organises this
… After IETF we could follow up on the lightweight WebCodecs serialization format
… also consider, what is the web compatibility story with MoQ?
OSMART2
Chris: The second event, is OSMART2, open source reference tools, organised 5G-MAG and DVB
… 5G-MAG is media focused, and have a close relationship with 3GPP
… This event is about sharing information about software tools and reference implementations
… W3C members are welcome to join the meetings
… Two sessions over two days
… They also invited a presentation
… I thought of two possiblities: TTML/IMSC, there are open source tools
… But also WebCodecs and WebTransport have demo code available from the WGs
… So WC and WT maybe for future events
… so following up with TTWG on IMSC
Priorities for 2024
Chris: Various topics, may not be everything
… TV app development, with Chris L
… Feature / capability detection, resolution for video plane and graphics plane, did it get support in CSS? Need to follow up
… Launching TV apps, there are technologies like DIAL and Presentation API, so need to refer back to the docs to understand the developer need. Conversation with manufacturers needed
… Met recently with APA WG, they pointed to needs on chapter navigation, so could be interesting to look more closely. Do we need a new data schema, how to integrate with a11y tooling?
… Investigate then move to designing solutions in a separate group
… Interlinear synchronisation, we can bring expertise to support defining requirements
… Accessibility for non-HTML, could collaborate on requirements
Francois: Immersive Web group looking also at this, they need to integrate with assistive technologies. There was some discussion at TPAC on that
… It's the Accessibility Object Model (AOM), to provide hooks to the assistive tools. So there may be something worth coordinating on. I agree it's broader than TV apps using WebGL
Kaz: The APA WG would like to update their MAUR document based on our input. Maybe we can provide some use cases for that purpose, media handling with some improved and extended methods
… I think, not only TV streaming, but potentially UI methods and user input/output devices could be involved, for example glasses type displays or handles, etc
Chris: Could organise through joint meetings, I don't know what the APA WG has planned
… I'll follow up
… C2PA now has some wider industry interest and momentum, driven by current interest in generative AI - to distinguish real from AI generated images
… They have a solution for images, and working on solution for live video
… Could help if there's a need for browser integration. But they may not need our help if they want to progress that
… Other W3C groups, Publishing BG, text and data mining CG
… Media production, identified technologies, we'd be happy to facilitate conversation between tool vendors, anyone building editor apps
… As with each of these topics, needs people in our community to help drive the conversation
… Media metadata and timed metadata, presentation at TPAC from NHK and Daihei, we're open to continue to explore that
… Media formats, next generation audio presented at last two TPACs, hoping there'll be a proposal in MEIG soon
… Video formats for immersive media, may have come up in Immersive Web? Relates to metaverse as a use case
… Web support needed for avatar encodigns and renderings?
… HDR is an active ongoing topic, good progress towards Canvas support and proposals to CSS and HTML
… Object based media may or may not have standards requirements, not clear that the companies involved are ready to push it
… synchronized playback - OSP, Apple presentation at TPAC, multi-device timing CG
… In general, no shortage of subject areas, but are people in our community interested to help lead on any of these
… Are there things missing? And who to connect with to move forward on any of these?
… The Overview of Media Technologies document was a great initiative but hasn't been updated with more recent changes
… Ideal if we could continue it as a living document
Kaz: I think this slide has enough important topics listed. Could categorise them. Horizontal viewpoint in general could include accessibility. Also thing about security and privacy more
… Other technical topics, which include metadata and production, could be continue to be discussed
… For that purpose, we should clarify the industry need from vendors and allied SDOs, and use cases and requirements
… So need more active volunteers. Could ask participants about their interest
Kaz: When we started rechartering discussion, we thought of doing a survey to get interested topics, maybe we can do that
Chris: We could work offline to design a set of questions
AOB
Chris: Any AOB items?
<kaz> (none)
Next call
Chris: December 5
<kaz> [adjourned]