Re: [httpstreaming] Current Status and Our Goal
Daniel Park <soohongp@gmail.com> Fri, 01 October 2010 02:02 UTC
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References: <18429BFD-5C5F-4513-85B7-8B91F6D28C97@niven-jenkins.co.uk> <C8CA2FC7.5093%luby@qualcomm.com>
Date: Fri, 01 Oct 2010 11:03:13 +0900
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From: Daniel Park <soohongp@gmail.com>
To: "Luby, Michael" <luby@qualcomm.com>
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Cc: "httpstreaming@ietf.org" <httpstreaming@ietf.org>
Subject: Re: [httpstreaming] Current Status and Our Goal
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That's what I pointed out at the previous mail. "gap analysis among the existing approaches" For example, a new design team (or study team) can be formed together in this group. It's very general process within IETF to harmonize different voices. Daniel @ Samsung On Fri, Oct 1, 2010 at 4:15 AM, Luby, Michael <luby@qualcomm.com> wrote: > One thing I suggest is that this group seriously study DASH standardization > work in 3GPP and MPEG to understand what these standards do and do not > address, preferably before deciding whether or not to start a group and > definitely before establishing a charter if the decision is to start a > group. > > > On 9/30/10 10:13 AM, "Ben Niven-Jenkins" <ben@niven-jenkins.co.uk> wrote: > > > David, Colleagues, > > > > On 29 Sep 2010, at 19:59, David A. Bryan wrote: > > > >> So we have had a number of threads, some about possible work, some > >> about details in the charter, etc. I think it is great to start > >> thinking about a possible charter if this work turns into a WG, and > >> some good reference drafts (thanks to Qin and the folks from Apple for > >> putting these together), but I think another way to look at this might > >> be to at least initially take a step back and see if the folks on the > >> list can take a stab at some more basic questions. I think that was > >> perhaps what Qin was getting at when we started this thread, but it is > >> always good to refocus. > >> > > > > Ah! I (wrongly) assumed that the areas of possible work were already > known to > > someone and the proposed charter was just an attempt to articulate them. > > > >> I'll ask two really basic questions to the folks on list, and let's > >> see what the opinions may be, and maybe we can move forward from > >> there. Personally, I think that if we have a bar BoF, focusing just on > >> these two basic questions (ok, one is a compound question, but one is > >> basic!) might be a good way to move forward. I expect we'll have some > >> VERY different answers. Remember that HTTP streaming may mean > >> different things to people, and might even be the wrong term...but > >> these are the things we need to try to figure out. > >> > >> So the two big questions: > >> > >> 1) On the topic of this list/HTTP streaming, what do you think is the > >> problem/problems/scenario we should be looking at? > >> > > > > I do not feel I am in a position just yet to start making statements > about > > what problems I think a HTTP streaming group (if formed) should look at, > > however one area that I think may be interesting to study and that I am > not > > aware of other bodies looking at is "chunk hints". > > > > A lot of streaming media today is delivered via CDNs that operate as more > than > > just a dumb (inline) proxy cache. > > > > HTTP naturally supports the insertion of caches transparently to the end > > points so one could argue that nothing more needs to be done for HTTP > > streaming than for regular HTTP. > > > > As adaptive bit rate combined with HTTP delivery relies on throughput > > measurements to determine the appropriate bit rate to download for > subsequent > > chunks, variation in latency (e.g. the difference between a request for a > > chunk being a cache hit Vs a cache miss) is likely to affect the > throughput > > perceived by the client and therefore may cause bit rate switch on a > cache > > miss that wouldn't have occurred had the request actually been a cache > hit. > > > > If there was some way to provide a "hint" to the server/cache as to which > > chunk the client is likely to request next then a CDN could elect to > retrieve > > that chunk ahead of it actually being requested to keep the response > latency > > (or some other factor) more consistent and avoid additional bit rate > switches. > > > > > > > >> 2) What other standards body work in this space are you aware of > >> (including IETF work), and how do you think any new work would fit in > >> (or not!) with the answer above? > > > > None that I am aware of. > > > > > > > > _______________________________________________ > httpstreaming mailing list > httpstreaming@ietf.org > https://www.ietf.org/mailman/listinfo/httpstreaming > -- Soohong Daniel Park Samsung Electronics, DMC R&D http://www.soohongp.com, twitter:@natpt
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal David A. Bryan
- Re: [httpstreaming] Current Status and Our Goal Ben Niven-Jenkins
- Re: [httpstreaming] Current Status and Our Goal Luby, Michael
- Re: [httpstreaming] Current Status and Our Goal Daniel Park
- Re: [httpstreaming] Current Status and Our Goal Roni Even
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Roni Even
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Kathy McEwen
- Re: [httpstreaming] Current Status and Our Goal Marshall Eubanks
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Kathy McEwen
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Kathy McEwen
- Re: [httpstreaming] Current Status and Our Goal Colin Perkins
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Lars Eggert
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Mark Watson
- Re: [httpstreaming] Current Status and Our Goal Ye-Kui Wang
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal Mark Watson
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal Lars Eggert
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Mark Watson
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Ning Zong
- Re: [httpstreaming] Current Status and Our Goal Mark Watson
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Ning Zong
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal Ye-Kui Wang
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- Re: [httpstreaming] Current Status and Our Goal Qin Wu
- [httpstreaming] Push Vs Pull (was Re: Current Sta… Ben Niven-Jenkins
- Re: [httpstreaming] Push Vs Pull (was Re: Current… Qin Wu
- Re: [httpstreaming] Push Vs Pull (was Re: Current… Mark Watson
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)
- Re: [httpstreaming] Push Vs Pull (was Re: Current… Ning Zong
- [httpstreaming] Push Vs Pull Re: Current Status a… Qin Wu
- Re: [httpstreaming] Push Vs Pull Re: Current Stat… Qin Wu
- Re: [httpstreaming] Push Vs Pull Re: Current Stat… Thomas Stockhammer
- Re: [httpstreaming] Push Vs Pull Re: Current Stat… Qin Wu
- Re: [httpstreaming] Push Vs Pull Re: Current Stat… Thomas Stockhammer
- Re: [httpstreaming] Push Vs Pull Re: Current Stat… Qin Wu
- Re: [httpstreaming] Push Vs Pull Re: Current Stat… Thomas Stockhammer
- Re: [httpstreaming] Push Vs Pull Re: Current Stat… Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal Colin Perkins
- Re: [httpstreaming] Current Status and Our Goal David R Oran
- Re: [httpstreaming] Current Status and Our Goal Benjamin Niven-Jenkins
- Re: [httpstreaming] Current Status and Our Goal Thomas Stockhammer
- Re: [httpstreaming] Current Status and Our Goal Colin Perkins
- Re: [httpstreaming] Current Status and Our Goal Spencer Dawkins
- Re: [httpstreaming] Current Status and Our Goal Wenbo Zhu
- Re: [httpstreaming] Current Status and Our Goal Ning Zong
- Re: [httpstreaming] Current Status and Our Goal Ning Zong
- Re: [httpstreaming] Current Status and Our Goal Ali C. Begen (abegen)