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Re: Adaptive images

From: Charles McCathieNevile <chaals@opera.com>
Date: Thu, 02 Jun 2011 14:39:27 +0200
To: "Maciej Stachowiak" <mjs@apple.com>, "Charl van Niekerk" <charlvn@charlvn.com>
Cc: "Tab Atkins Jr." <jackalmage@gmail.com>, "Leonard Rosenthol" <lrosenth@adobe.com>, "Henri Sivonen" <hsivonen@iki.fi>, "Karl Dubost" <karld@opera.com>, "public-html@w3.org" <public-html@w3.org>
Message-ID: <op.vwf731m4wxe0ny@widsith.local>
On Thu, 02 Jun 2011 00:36:55 +0200, Charl van Niekerk  
<charlvn@charlvn.com> wrote:

> On Wed, Jun 1, 2011 at 4:08 AM, Maciej Stachowiak <mjs@apple.com> wrote:
>> I don't think any solution along the lines of "read from server and  
>> stop early" cuts it either, because latency is high on modern cellular  
>> networks in proportion to the bandwidth, so if I cut off the server  
>> connection early, my incoming bandwidth has already been wasted.
> That might be true but the unfortunate reality is that many mobile
> network providers still bill their customers on a per-MB basis or
> enforce a certain monthly data "cap".

Actually, this is the case for a large proportion of landline customers as  
well. Images on mobile are the pointy end of the discussion, but the same  
thing happens on video - where currently people get some site-specific UI  
to switch between different versions.

> Many customers do not have
> restrictive plans though so the ideal would be if the user can
> configure his/her agent to either optimise for latency or bandwidth
> efficiency on an individual basis. This decision could also be
> automated under certain circumstances, for example when the user is on
> a low-bandwidth connection or roaming outside of the normal service
> area.

See Opera Turbo for an example of doing this via a proxy service.


Charles McCathieNevile  Opera Software, Standards Group
     je parle français -- hablo español -- jeg lærer norsk
http://my.opera.com/chaals       Try Opera: http://www.opera.com
Received on Thursday, 2 June 2011 12:40:17 UTC

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