[Openchrome-users] Re : CN700, XvMC and HDTV.

[manu]

Le 23.10.2006 12:42:55, Thomas Hellstr?m a ?crit?:
> Hi, all
> 
> I just got a chance to play around with a CN700 board.
> 
> Unfortunately it seems like VIA has used the same video core as the
> Unichrome Pro group B series (The K8M800 / K8N800 chips), and all nice
> 
> features that were present on the CN400 seem to be gone.
> 
> This includes
> 
>     * Mpeg2 decoder AGP DMA capabilities. This means that mpeg data
>       can't be queued up to the decoder and the processor has to wait
>       for decoder ready. Gone is the small CPU usage and you will
>       basically end up at 20% or so with a normal (SD) dvd.
>     * Mpeg2 decoder HD capabilities. The hardware decoder is not
> capable
>       of anything above 1024x1024. Smooth software decoding of HDTV
>       using a via processor should probably not work very well either.
> 
> I'd say xvmc is more or less useless on this chip if the video player
> has a good software mpeg2 decoder.
> 
> If the HQV (video prefilter engine) is the same as the other group B
> chips, then CN700 users can also say goodbye to future
> composite-compatible playback.

Arghh, this board seems to be completely useless as a low power HTPC  
basis then! What were they thinking when developping it! Gosh!
Thank you for sharing your experience, this might save a few of use  
trying to setup an HTPC.
Bye
Manu



	

	
		
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