Meeting minutes
Slideset:
https://
cpn: first meeting
after TPAC
… list of topics there
… anything missing?
… Kaz, you mentioned MEIG Charter review
status
Charter review status
AC review results (Member-only)
kaz: We got 21 reviews,
2 suggestions, 4 abstentions, so should be OK for approval. I'll
work with PLH on the next steps
… One general comment about this being a long
standing charter, so should be updated
cpn: Are changes to the charter needed?
kaz: It should be OK, but I'll follow up on that
cpn: could be good to define more precise scope and objectives for each recharter
Review of TPAC outcomes
DVB liaison on accessibility services
cpn: discussed with
various groups during TPAC
… APA WG, MEIG, TTWG
… links for the minutes within the
slides
… TTWG focused on subtitle captions and audio
description
… We should organize a separate call to discuss
other aspects
… screen readability, magnification in the
UI
… etc.
… not sure if TTWG has looked into those
points
… Andreas, any feedback?
atai: there was some
reluctance from DVB to share in public
… possibly due to IPR issues
… depends on their policies
… everybody can join the meeting
… TT is mainly looking into subtitles
… there is overlap with CTA WAVE specs as
well
… good to inform today's DVB context
cpn: yes, we should let
them know we're reviewing but would need some more time
… TTWG can send a response immediately
… we can send our own response in addition to TTWG
too
… just need somebody to contact them
… maybe Kaz as the Team Contact can talk with the
TT Contact, Atsushi
atai: maybe Francois also
cpn: we could have a
meeting to go through the detail, but not minute it publicly
… to generate some text as the basis for the
liaison response
… propose to do that in the next week or
two
HTML5 issues on embedded CE devices
cpn: John Riviello
presented results of the recent survey by CTA WAVE
… emphasises the continued need for a standardised
web based platform across CE devices
… good collaboration with web platform
tests
… W3C can work on APIs where gaps for new
capabilities are identified
… WAVE would potentially work on collecting those
into a platform definition
… W3C give input on WebGPU, Web Assembly, etc., or
if there are specific issues with W3C specs
… the other thing we heard are performance
issues,
… is there anything we can capture around issues on
specific specs?
… do we need to move to different kind of rendering
approach if it can't be improved
… John, want to add anything?
john: sure, it's tricky
since related to low-power devices moreso than issues with
individual specs
… WAVE actually had a meeting
yesterday,
… we try to get content providers on
board
… to help the discussion get momentum
… also WAVE could define performance related
tests
cpn: in the media api
cg, there was a draft document on developer guidance
… we should think about revisiting that, could be
helpful?
john: good point
cpn: next step, WAVE is
looking to get together a group of content providers
… anybody here with interest, I would suggest get
in touch with John
john: thanks
TV application development
cpn: one particular
need was identified,
… to simplify deployment to devices during app
development
… as well as in deployment and
installation
… we have draft document outlining the
problems
Launching Web Applications on consumer products
cpn: Chris Lorenzo, anything to add?
cl: talking group about
standardization
… talking within Comcast, including proprietary
approaches
… need discussion with device manufacturers as
well
… solution could be wider adoption of DIAL
protocol, which was driven by Netflix
cpn: not sure if
manufacturers are here today, but we can contact them
… is there also an issue of who is allowed to
launch, certification requirements for installation? enabling
developer mode?
… good stuff for the next steps
cl: even start with one
manufacturer
… write down the steps and talk with the
manufacturers
john: WAVE met last
week and had discussion
… ATSC is handling something
… HTML entry page description
… ATSC, HbbTV and SDOs from Asia
… they could put the requirements
cpn: interesting
… Louay also mentioned in testing framework,
putting the URL in metadata in a transport stream
… it's coming from TV delivery-centric point of
view
… so there are those various use cases for
launching apps: a broadcaster app associated with a linear channel,
a VOD app installed on the device
… on TV devices, whether the app is installed and
launched through the remote control or via a companion
device
… maybe worth considering about the
details
… starting with some of the
manufacturers
… I'm thinking of people but don't want to mention
concrete names here :)
… any other thought on this?
Cross-industry media distribution
cpn: interesting
discussion during TPAC breakout session
… metadata to enable cross-industry media
distribution
… organized by NHK with presentation from
Endo-san
… and Daihei for the publishing industry as
well
… in the discussion, real focus on
metadata
… to enable these kind of use cases
… we're open for the next steps
… some questions in the breakout were about media
metadata defined by many SDOs
… can we identify the detailed and specific use
cases we want to support?
… aspecific issues with the JP market driving this
discussion?
… identify particular standards and
requirements?
… any additional thoughts, particularly from those
participating the session?
kaz: There are at least
two viewpoints on this, target areas for metadata usage,
broadcasting and OTT video distribution services, in MEIG
… NHK are thinking about broader services,
including video distribution, publishing, toys and games, and so
on
… Any kind of applications and services based on
specific content. A famous comic has characters and products, so
the relationship between those products would be in scope as
well
… For that purpose, think about how to proceed,
broadcasting may be handled by MEIG internally, but other areas
might require another group or further liaisons with other SDOs or
stakeholders
cpn: interesting
… one of the possible use cases we discussed is a
TV program related to some e-book
… or buying a physical product that's
related
… not sure how to handle the relationship at the
moment
… but may need some metadata
… so that we can identify the cross-references,
we'll need to investigate
… so potentially a linked data kind of approach
could be used?
kaz: yeah
kaz: PLH described W3C's activities in two categories: browser and data on the web areas, this relates to both
igarashi: have a
comment about the idea
… the requirement is only about the JP
market?
… also media distribution industry?
… the intention is not only broadcasting but could
include publishing
… probably NHK needs to involve people from not
only Japan
… also to involve the other industry
stakeholders
… that's my suggestion
cpn: we have a good
relationship with the publishing group within W3C as well
… could look into their ideas
… e.g., between TV show and related
e-book
… also other kind of products
… but to do that would need to get other industry
stakeholders too
kaz: I agree, we could
start with a smaller discussion as a basis, e.g., collaboration
between broadcasting and publishing, and further media mixed
services after that
… I'd like to ask NHK guys opinions as
well
Ohmata: The proposal
covers a wide range in the media and non-media industries
… I think the first steps, we have to discuss a
simple use case such as broadcast and OTT
… The next step in the media industry is, for
example, TV and e-book
… The last step would be media and other
industry
… We had limited time in the breakout so we didn't
discuss the detailed metadata issues
… So detailed discussion on the differences between
metadata standards between countries, so this could be discussed
step by step
cpn: happy to take your
guidance around how to proceed
… if you prefer holding a planning meeting
privately, happy to do that
… or looking into media metadata more in
detail
… we don't need to involve other
groups
… focus initially in the media
industry
… would that be a good next step?
igarashi: if NHK would
like to focus on media industry first, MEIG would be a good
place
… Comcast also interested in applications on
consumer devices
… I have a question about media use
cases
… metadata is one of the industry
assets
… does NHK would like to standardize
them?
… or interested in the last-mile for OTT
services?
… what is your interest?
endo: not answer to
Igarashi-san but another comment
… we don't plan to standardize
metadata
… specific use cases on media
collaborations
endo: We'd like to discuss privately as the next step
kaz: actually, the first point was an answer for Igarashi-san's question :)
igarashi: ok
cpn: we got some
clarification
… happy to organize another meeting when you're
ready
HDR
cpn: very active
topic
… Christopher Cameron from Google presented at
TPAC
cpn: kind of layered
model
… how to handle WebGL extended range for HDR, CSS
media query for HDR headroom
… he is looking to get alignment on the
approach
… so the HLG and PQ formats can be handled, as a
next step
… if you're interested, please join the
meetings
AV Media Formats for Browsers CG
cpn: media capabilities
API signaling of Dolby HDR metadata
… prefer bringing into the MEIG
… good to have one place for the
discussion
Media WG issues needing MEIG/WAVE input
cpn: Media WG has some
issues on support for MPEG CMAF in the Media Capabilities API
… from previous discussion there was a suggestion
to create an opensource library to do the mapping
… is there still any spec gap to be
addressed?
… don't want to talk about the detail
now,
… but would like to hold discussion another
time
… display capability and decode capability handled
separately in the MC API
… we have CSS media query for TV video plane HDR,
but do we also need a query for the video plane pixel ratio or
resolution
… for example, a device may play 4K video but have
lower graphics plane resolution. how to expose that?
Media WG exploratory work/proposals
cpn: several
exploratory topics
… hardware accelerated video
capability
… synchronized media playback between
users
Kaz: To clarify,
synchronized playback between users, is that like bullet-chat, one
video content with multiple inputs for subtitles from various
users?
… or TV based gaming?
Chris: It's more about different people in different places watching the same content at the same time
Kaz: tx for clarification. In that case, a possible use case is rather remote live session including players all the over the world :)
cpn: yes
[adjourned]