W3C Media & Entertainment IG Meeting

3 October 2023

Agenda

Date and time�3 October 2023, 14:00-15:00 UTC

IRC�https://irc.w3.org/?channels=#me

IRC Guide�https://www.w3.org/wiki/IRC

Code of Conduct https://www.w3.org/Consortium/cepc/

Agenda

• Welcome
• Review of TPAC outcomes and next steps
• TV application development
• HTML5 issues on CE devices
• Launching apps
• DVB liaison on accessibility service signaling
• Cross-industry media distribution / Media metadata
• Progress on HDR
• Media WG issues needing MEIG / WAVE input
• Media WG exploratory work / proposals
• etc
• AOB

HTML5 issues on embedded CE devices

• John Riviello presented results of the recent survey by CTA WAVE
• General agreement on the business need for a common web-based platform for CE devices
• Developers report performance problems
• Ensure existing Web APIs are supported across devices
• CTA WAVE DPCTF Testing and Web Media API Test Suite
• Parallel workloads on CE devices: video playback, CSS animations, caption display, audio rendering, network communications. Can we characterise the worst case app usage?
• W3C would not look to define a new platform itself. Instead focus on:
• Develop upstream APIs
• Capture performance issues inherent in W3C specifications and raise with relevant WGs

TV application development

• Goals:
• Simplify deployment to devices during app development
• Simplify deployment and installation of apps in production
• See Launching Web Applications on consumer products draft
• Next:
• Identify changes needed:
• A new specification?
• Adoption of existing specifications?
• etc.

DVB liaison on accessibility services

• Discussed in TPAC APA WG / MEIG / TTWG joint meeting (minutes) and in TTWG meeting (minutes)
• Discussion on TTWG mailing list (member only link)
• TTWG discussion focused on subtitles and audio description
• Next steps:
• Coordinate W3C response between MEIG, TTWG, APA WG
• Feedback on other aspects?

Cross-industry media distribution

• TPAC breakout: slides, minutes. Discussion led by Endo (NHK) and Daihei Shiohama (Media-Do)
• "best practices for usage of media content metadata is not sufficiently shared"

Cross-industry media distribution

• Next steps
• MEIG welcomes further collaboration on this topic
• Some questions and suggestions from TPAC:
• Consider what other SDOs are doing, e.g: SMPTE, ARIB, ATSC, HbbTV
• Is this a global issue or more specific to the Japan market?
• Can we develop more detailed and specific use cases to help identify standards requirements?

HDR

• Christopher Cameron (Google) presented at TPAC - slides, minutes
• Continue discussion in�Color on the Web CG�Next meeting: 3 October at 17:00 UTC�(see calendar)

AV Media Formats for Browsers CG

• Media Capabilities API signaling of Dolby HDR metadata
• Browser support for next-generation audio codecs (e.g., AC4 and MPEG-H)

Media WG issues needing MEIG/WAVE input

• w3c/media-capabilities#99 Support for MPEG CMAF supplemental data
• w3c/media-capabilities#98 Support for MIME Type Profiles subparameter in order to support CMAF, etc.
• w3c/media-capabilities#157 Text tracks not supported
• Video display capabilities
• CSS includes video specific media queries: video-color-gamut and video-dynamic range
• w3c/csswg-drafts#6891 Expose video plane pixel ratio - revisit and advocate, if this is useful for TV apps

Media WG exploratory work / proposals

• Web Video Filters API - see TPAC slides and minutes
• Exploratory work by Intel: Post-processing Video in the Web via a WebCodecs extension for both Real-Time (streaming) and Offline (Video Editing) use cases
• Some examples: Noise removal, enhancing color contrast, background blur, face retouch, AI based filters
• Contact Rijubrata Bhaumik at Intel
• WebKit Media Session Coordinator API proposal - see TPAC slides and minutes. Explainer
• Media Session API extension for synchronized media playback between users
• Apple seeking interest from developers and other implementers

Thank you!