[GGIE] Comments on the use cases from Japanese TV broadcasters' viewpoints

Hello folks,

Here is a rough English translation of the comments I've gathered during
the conversation with engineers, researchers and media strategists from NHK
[1] and JBA [2] on the GGIE use cases. Note that the conversation was in
Japanese and really casual, so this English translation might contain
something beyond, or different from, their original ideas. If you found
something wrong or logically invalid in these comments, that would be my
bad.

I've already shared with the moderator and co-chairs these comments; Glenn
is preparing his responses, and it's likely for us to discuss the comments
and the responses at the next call or sometime in the near future.

Regards,
 Yosuke

[1] http://www.nhk.or.jp/corporateinfo/
[2] http://www.j-ba.or.jp/category/english


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* Standardization Process
- How will succeeding works in other SDOs happen?: The standardization
process after we finish analyzing gaps in the TF is unclear, esp.
succeeding standard developing works in other SDOs such as IETF and SMPTE:
Is Glenn going to bring the document privately to them, or will the W3C Web
and TV IG GGIE TF make liaisons with other relevant SDOs on the gap
documents and encourage them to start developing new standards?
- Involving streaming media stakeholders: Should we invite streaming media
service providers such as Youtube (Google) and Netflix into this
discussion? They seem like important stakeholders in W3C on this type of
topics.
- Overlaps with TV-Anytime: There are some overlaps between the
concept/scope/architecture of GGIE and that of TV-Anytime: CRID, user
metadata, authority, resolution providers, etc. Jean-Pierre from EBU has
already mentioned about some of them but the discussion seemingly stopped
before reaching any conclusion in the TF. Is the TF going to further look
into TVA? [1]

* General Comments on Use Cases
- Boundary of the ecosystem: What will be the boundary between the services
which implement, or is a part of, the ecosystem and the rest of the world?
In other words, what is the scene setting about the boundary behind the use
cases? Should we review the use cases with assuming the world where all
video content distributions on the Net follow the GGIE use cases?
- How to involve non-professional users: Additionally, are there any ideas
to make home or hobby video creators to follow the use cases when they
upload or distribute content on the Net? Currently it seems like quite
difficult to achieve it if we don't provide them with convenient
mechanisms, incentive, and/or enforcement to do it.
- Viewer reviews on video content: Viewer reviews can be considered as a
type of metadata for video content (Cid) generated by users (Uid). Is it in
the scope of GGIE?
- Terminal or household id: For the TV set in a living room, terminal or
household id is sometimes more convenient, or better fits actual use cases,
than user id. What does the TF think about this?
- Anonymous users: Some use cases which prerequisites users to be
identified might be more beneficial to the ecosystem if we allow anonymous
users to use a whole or part of such use cases.

* Comments on Specific Use Cases
- [User-Discovery-UC-1] Device profiles are definitely useful and looks
like a missing part in the current Web standards. Security and privacy
consideration should be done along the way.
- [Streaming-UC-3] Does this use case include the case where a user feeds a
stream from his or her home device to mobile devices?
- [Streaming-UC-3] There is no description about to whom applications
report logs or measurements. Defining it as an actor might help better the
use case.

[1] https://lists.w3.org/Archives/Public/public-web-and-tv/2015Mar/0018.html
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Yosuke Funahashi
co-Chair, W3C Web and TV IG
Web Media Specialist, W3C
Project Associate Professor, Keio University