Re: [AVT] supporting variable picture sizes indraft-ietf-avt-rtp-h264-10.txt

[Colin Perkins <csp at csperkins.org>]

Reha,

On 23 Jul 2004, at 10:04, REHA CIVANLAR wrote:
> Let's say I am considering to send H.264 video with changing picture 
> resolutions to a mobile device or a set top box. If my target display, 
> which I know to be  H.264 compatible, is not capable of adjusting its 
> final display size to a constant resolution, I, probably, wouldn't 
> want to use variable resolutions, because the end user will obviously 
> not be happy to watch video with changing picture sizes... (By the 
> way, this argument applies to variable frame rates also.) Moreover, 
> even if the display device displays everything at a set resolution, I 
> may still need to know what kind of interpolation is being used for 
> this purpose before deciding to use variable resolutions.
>
> My question is shouldn't these be specified e.g., in the set of 
> attributes for the end device? Should another standard body be 
> addressing this issue?

I can potentially see value in such a set of attributes, but I'm not 
sure they're necessarily specific to H.264. Are such attributes 
something that can be generalised, and possibly included in SDP?

Colin


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