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Re: [css3-mediaqueries] tv and screen media types

From: David Storey <dstorey@opera.com>
Date: Fri, 29 Oct 2010 12:30:10 +0200
Cc: www-style@w3.org
Message-Id: <D3CEAB3E-6B82-44DA-89EE-B1A6FEAA5006@opera.com>
To: Rune Lillesveen <rune@opera.com>

On 29 Oct 2010, at 09:45, Rune Lillesveen wrote:

> On Fri, 29 Oct 2010 09:14:31 +0200, fantasai <fantasai.lists@inkedblade.net> wrote:
> 
>> On 10/28/2010 05:41 AM, Rune Lillesveen wrote:
>>> On Thu, 28 Oct 2010 14:20:18 +0200, David Storey <dstorey@opera.com> wrote:
>>> 
>>>> The Nintendo Wii browser uses the TV media type if it is there
>>>> otherwise uses the Screen media type. It works better than handheld as
>>>> there is no, or less legacy content out there using TV which would
>>>> break modern browsers.
>>>> 
>>>> I believe the TV media type is quite useful as modern TVs have pretty
>>>> big resolution now (so you can;t do the trick like with mobile for
>>>> applying style when the resolution is lower), but you want a somewhat
>>>> different experience on TV. You generally sit close to a desktop or
>>>> laptop so can have regular size text, while on TV you are usually
>>>> sitting back on the couch, so want to pump up the text size for
>>>> example. Using a TV media type makes it much easier to detect the user
>>>> is on a TV, providing browser vendors support it. TVs also come in a
>>>> standard set of resolutions (1080p/i 720, SD etc) so the TV media type
>>>> in combination with media queries for those resolutions can be quite
>>>> powerful if supported.
>>> 
>>> Pumping up the pixel size of a font based on physical DPI is only needed
>>> for broken UAs, right? See [1]
>>> 
>>> [1] http://www.w3.org/TR/CSS21/syndata.html#pixel-units
>> 
>> Note that definition of the pixel has been superseded.
>> http://fantasai.inkedblade.net/style/specs/css2.1/px-unit
>> http://csswg.inkedblade.net/spec/css2.1#issue-149
> 
> Yes, and with that definition, for tv, the physical units would be anchored to the reference pixel, making it even less interesting to change font-sizes based on the resolution media feature.

Yes, as far as I see it, browsing on TV is a different context. It is less about DPI and resolution, and more about the context you are viewing web pages. Usually in a more social setting. PC and mobile is more one to one where you are close to the screen, while with TV you are about 10 feet away, and often (but not always) i a more social setting where multiple people can see the content. For this you donít care about the DPI, but more that the user is viewing on a TV (TV media type) and you want to adjust the layout; The most simple being the text size so it is physically big enough to read across the room instead of readable at a few cm from the screen. 
> 
> -- 
> Rune Lillesveen
> Senior Core Developer / Architect
> Opera Software ASA
> 

-- 
David Storey

Chief Web Opener / Product Manager, Opera Dragonfly
W3C WG:  Mobile Web Best Practices / SVG Interest Group 

Opera Software ASA, Oslo, Norway
Mobile: +47 94 22 02 32 / E-Mail/XMPP: dstorey@opera.com / Twitter: dstorey
Received on Friday, 29 October 2010 10:30:46 GMT

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