[mythtvnz] CPU required for Freeview HD

[Steve Hodge]

On Wed, Aug 20, 2008 at 2:27 PM, Barry Clearwater <barryc at bcsystems.co.nz>wrote:

> I take the point that a high def signal is getting heavily compressed,
> but we *are* talking about well known compression algorithms are we not?
> Should somebody be writing a more optimised piece decompression code, or
> in a lower level language? (cough - assembler anybody!!??)
> ITs just a 2D picture, our systems are capable of rendering 3D on the
> fly...
> I must be missing the point and over simplifying it somewhere.


Our systems are capable of complex 3D rendering because they have hardware
support. But 2D vs 3D really has nothing to do with it. I can assure you
that plenty of optimisation is happening but the algorithm is sufficiently
complex that most CPUs cannot run it in real time regardless of
optimisation. The same situation occurred in the early days of mpeg2 as well
(and even jpeg before that).

<pride speaking>
> No way should windows boxes out-compute a gnu/linux system.
> </pride>


Well the Windows systems can off load some of the processing to the graphics
card and the Linux system cannot. Specialised hardware can make a huge
difference to performance. That's why we have powerful processors on our
graphics cards.

Cheers,
Steve
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