Re: [W3C Web and TV IG] Adaptive streaming MPEG DASH liaison

On Mar 18, 2011, at 3:20 PM, Rob Glidden wrote:

So from what you say, DASH as-is is heavily encumbered,

Thomas didn't say this and I don't believe it will turn out to be the case at all.

and until resolved neither RF spec nor profile is viable.

W3C policy is clearly royalty-free and there are stakeholders favoring a royalty-free result, encouraging patent holders to come forward with RF declarations.

I don't think any of the proposed wordings are intended to imply that W3C's royalty-free IPR policy is anything but reasonable.

So all the more reason to just remove the known patents until a royalty-free grant is obtained.

There are no known patents (AFAIK). Why should we jump now to a conclusion that there will be and that a formal royalty-free profile process in MPEG is needed ? As Thomas explains very well, there are good reasons to hope for an outcome in which DASH can be used by W3C as is ?



On 3/18/2011 2:38 PM, Thomas Stockhammer wrote:
Mark, Rob, Ali, all,

Disclaimer: This is a purely personal opinion and does not reflect any opinions of any companies I am representing.

There is a significant interest to create an ecosystem around OTT/Internet/HTTP-based streaming by many relevant players in the market, smaller and bigger ones. On piece in the puzzle is the necessity and opportunity to create confidence for content providers and users that converging and widely accepted technology exists. Therefore, a single standard is a great opportunity and history has proven that single world-wide accepted standards are incubators for great business (look at GSM, WiFi, HTML, H.264, etc.). From my experience working in this area over the last couple of years, the vast majority of the contributors are interested in creating this ecosystem and confidence. The concrete business opportunities for these contributors are not in royalties, but in providing products, services, content, etc. based on these formats and still have the ability to differentiate in other areas. In the end, the user does not care how champions league final or the latest block buster is delivered, but they are interested that they have access to the content anytime/anywhere and the quality/user experience is acceptable/good/great, just as good as possible.

I am confident that royalties will not be the blocking point in the acceptance of DASH as a world-wide standard. However, it does not make any sense to push a question at another SDO for which the SDO can only answer according to their IPR policy. If, however, the communication is such that the member companies themselves have some basis to react and also have a contact person they can talk to in case they have questions, then there is a great opportunity to resolve the concerns of the interested players. IPR policies are important, but they are not the holy grail and are just one piece in the puzzle to create successful ecosystems. Again, I support that the interested companies in W3C communicate their requirements/recommendations for adopting DASH, but these requirements/recommendations should be reasonable and also provide a basis for discussion/negotiation and not require a yes/no answer.

Let's be more positive and let's stimulate communication


On Mar 18, 2011, at 7:02 PM, Mark Watson wrote:

On Mar 18, 2011, at 10:22 AM, Ali C. Begen (abegen) wrote:

-----Original Message-----
From: Gerard Fernando []
Sent: Friday, March 18, 2011 1:01 PM
To: Ali C. Begen (abegen);<>;<>;<>
Subject: Re: [W3C Web and TV IG] Adaptive streaming MPEG DASH liaison

I totally disagree. No point wasting time asking a "non-pushy" question as MPEG is likely to send back a useless answer.
Better to ask a blunt question as then you are likely to get a straightforward/clear answer.

Could it be that some folks are worried by the likely answer from MPEG - which is that DASH (in it's current state with
normative references to other standards) can't be made RF that easily.

On the contrary I am hopeful that stakeholders will come forward and say they will offer their IPRs in RF basis.


Agreed. Some already have.

And please bear in mind the nature of the technology we are talking about here. We are talking about *data formats* for a manifest and media file, not client or server procedures, which are not defined by DASH. The manifest concept is well established in various deployed technologies and would be followed by any other adapative streaming that W3C could come up with anyway.

I find it hard to see how there could be any significant IPR worthy of royalties that is essential to this specification. That's just my opinion, but I urge others to take a closer look at what we are actually talking about and form their own views rather than assuming that just because it's MPEG people will be expecting to make significant money out of this.




From: Ali C. Begen (abegen) <<>>
Sent: Fri, 18 March, 2011 8:15:00
Subject: RE: [W3C Web and TV IG] Adaptive streaming MPEG DASH liaison

-----Original Message-----
From:<> [] On Behalf Of<>
Sent: Friday, March 18, 2011 8:45 AM
Subject: RE: [W3C Web and TV IG] Adaptive streaming MPEG DASH liaison

Hi All,

I am supporting Mark’s proposal (attached). That is right to the point of the Royalty Free question and still avoids to be
unnecessarily pushy towards MPEG.

+1. Being pushy will not get us anything useful in the desired time frame.


The letter sent to 3GPP by Web and TV Interest Group chairs is not the best reference to copy as such here because that
letter was created without consulting and was not reviewed by the Web and TV Interest Group members before sending to

I believe that the more open-minded question in the liaison letter concerning MPEG DASH licensing will lead to the best
response without excluding any options.




Juhani Huttunen

Senior Solutions Manager

Compatibility and Industry Collaboration, NOKIA

Address: Keilalahdentie 2-4, 02150 Espoo, FINLAND

Mobile: +358 40 581 1138



From:<> [] On Behalf Of ext Mark Watson
Sent: 18 March, 2011 07:19
To: Rob Glidden
Cc: ???;<>
Subject: Re: [W3C Web and TV IG] Adaptive streaming MPEG DASH liaison

Sent from my iPhone

On Mar 17, 2011, at 8:46 PM, "Rob Glidden" <<>> wrote:


   If the whole standard is RF, RF profile work won't delay anything.

It's not an a priori property of the specification. What we do, the options we leave open, discourage or encourage, can
the outcome.

I believe that there are companies that may well be able to commit to terms compatible with the W3C policy. But if we
off a formal 'RF profile' process    now it kicks the question way down the road and there will be no early clarity on this

I'm not saying that early clarity is certain, but I feel now is exactly the wrong time to give, up as you propose.

If RF profile work is delayed, then assertions (3rd party or other) can await opportune moment

Quite the reverse. A formal RF process removes any sense of urgency regarding clarification of terms.

Such happens.  There's never a quick fix for RF, just due diligence on multiple fronts.

Original response succinctly conveys W3C's royalty-free policy, which shouldn't budge.

The best way to convey the W3C policy is to link to it, perhaps with a quote. I think paraphrase/characterization is
the wrong way to convey these things.



On 3/17/2011 3:49 PM, Mark Watson wrote:


I don't understand what you mean by "And the response doesn't put W3C validating the well-known blocking/quick-fix/FUD
tactic of delaying RF profiles until it is too late.".

It seems that by jumping immediately into a process for definition in MPEG of an RF profile we completely set ourselves up
for delay. Not that I think anyone will be interested in making that process deliberately longer than necessary, but because
its nature it won't be fast. It's by no means certain that anyone has essential IPR or that if they do they will expect royalties
for it.

My proposal was shorter than the original & I think pretty simple and clear. It is more open than your proposal in terms of
the options going forward but does not exclude the option you suggest.


On Mar 17, 2011, at 3:14 PM, Rob Glidden wrote:

Simple, helpful and appropriate W3C response to the MPEG request to consider DASH profiles:

"We would like to draw your attention particularly to DASH’s profiles defined in DIS and would welcome W3C to provide its
needs and suggestions to improve them to better fit W3C’s needs."

Is the same that was sent to 3GPP:

"We would very much appreciate if you could inform us of the current status of the specification of DASH and the possibility
to work together on a royalty free profile of the specification for potential integration of DASH as adaptive streaming
mechanism for audio and video in HTML. "

An RF profile might not have to fully unring the already-wrung RAND bell.  And the response doesn't put W3C validating the
well-known blocking/quick-fix/FUD tactic of delaying RF profiles until it is too late.

The original 3GPP text is fine, a short liaison response is not a good venue for more complexity right now.


On 3/17/2011 7:57 AM, Mark Watson wrote:

Hi Rob,

At the workshop I suggested that we should not immediately go down the road of requesting a "RF profile". That view
seemed to have general support.

Requesting an "RF profile" implies starting a new process in MPEG which could not be complete for some time. It
immediately excludes the possibility that the specification could be used by W3C as is.

What I proposed in my text is significantly different from asking MPEG simply to follow their existing process. I suggested
"request MPEG member companies to make clear whether and under what terms the specification would be suitable for
adoption by W3C, given the above policy."

i.e. to explicitly ask them to look at the W3C policy and state whether the terms they offer could be compatible with that. It
possible that companies are able to offer terms which allow the goals of that policy to be met but which are different from
ticking the "Option 1" box. We should at least allow that possibility to be explored, before jumping to a formal RF process in


On Mar 16, 2011, at 11:46 AM, Rob Glidden wrote:

I think the previous version of paragraph 3, which asks specifically about working on a royalty-free profile, is more on point.

MPEG members are already under obligations to disclose patents and state whether they will license as RAND or RF.  The
latest publicly posted call for patents including DASH was dated October, 2010 (N11610) and is at "Standards under
development for which a call for patent statements is issued <> ".  W3C just
asking MPEG to do what it has already done and will do again anyway and request its members to do what they are already
obligated to do may be motivational to someone but is a do-loop.

As an exemplar, the MPEG ad hoc group on Type-1 coding has a publicly announced mandate (N11842) of refining Type-1
(i.e. royalty free) Requirements and a publicly announced meeting
<>  prior to the next MPEG meeting.


On 3/16/2011 8:33 AM, Mark Watson wrote:

Hi everyone,

Attached (doc & pdf) are some proposed changes, along the lines of my previous comments on the 3GPP letter. Note that
"and has the goal..." text that I added regarding the Patent Policy is taken from the Patent Policy itself: I think it is always
with legal aspects like this just to quote, rather than paraphrase or characterize: the legal text is usually worded the way it
for good reasons.

I didn't fully understand the fourth paragraph, or why it would be of interest to MPEG, so I suggest to delete it. But since I
didn't fully understand it I may have missed the intent.


On Mar 15, 2011, at 6:56 PM, ì´í˜„재 wrote:

Dear IG members,

As we shared our common interest of single solution necessity of adaptive streaming on the browser last Berlin. We
sent liaison letter to 3GPP right after Berlin. We will send same context to MPEG DASH scheduled to next week.
I drafted from 3GPP letter and added reply to MPEG DASH intention. The tone/content of letter is intentionally
adjusted mild for initiating discussion and get initial feedback.

The recipient of this letter will be MPEG convener Leonardo because liaison letter is sent from him. CCed to Iraj
DASH chair.
The sender of this letter will be W3C Web and TV IG chairs on behave of W3C Web and TV IG members. Even
though the recipient of the letter was W3C.

Please feel free to comment on the draft by this weekend. Sorry for the hurried update.

Best regards,
Dear Mr. Convener and DASH experts,

The W3C has recently launched a Web and TV Interest Group, set to identify requirements and potential solutions to
ensure that the Web will function well with TV.

During the second W3C Web and TV workshop, held in Berlin on 8-9 February 2011, it came to our attention that
many participants of the workshop are interested in getting single solution of adaptive streaming on the browser. One of
potential possibilities is DASH. As a result, Web and TV Interest Group(IG) co-chairs would like to convey this interest from
workshop participants and IG members to MPEG DASH experts, and to inquire about the licensing status of DASH. W3C has
strict royalty-free patent policy on the technologies that get adopted as core Web technologies.

We would very much appreciate if you could inform us of the current status of the specification of DASH and the
possibility to work together on a royalty free profile of the specification for potential integration of DASH as adaptive
streaming mechanism for audio and video in HTML.

As we see MPEG DASH is general enabler architectural framework for a starting point. Adaptive streaming for Web
and TV specific discussion (for example, profiling from DASH, when DASH is chosen as baseline) would better be placed in
special working group from Web and TV activity.

MPEG DASH experts willing to discuss the topic with participants of the Web and TV Interest Group may use the
public<> mailing-list, whose archives are publicly available at:

Companies and individuals willing to know more about W3C and W3C process may get in touch with Francois
Daoust < <><>> and Kazuyuki Ashimura < <><>>, W3C staff
for the Web and TV Interest Group.

Best regards,

Yosuke, Giuseppe, Mashahito, HJ (chairs of W3C Web and TV IG)
On behalf of the W3C Web and TV IG members.


Dr. Thomas Stockhammer (CEO) ||<> || phone +49 89 978980 02 || cell +491725702667 ||<>
Nomor Research GmbH  -  Sitz der Gesellschaft: München - Registergericht: München, HRB 165856 – Umsatzsteuer-ID: DE238047637 - Geschäftsführer: Dr. Thomas Stockhammer, Dr. Ingo Viering.

Received on Friday, 18 March 2011 22:47:21 UTC