Dieter wrote:
<SNIP>
The hardware scaler is only needed for analog TV
I think that that was meant in a different context where it is true.
Why? Most people most of the time will want the picture to be as large
as the display allows. If the source is SD and the display is HD they
will want it scaled up. If the source is HD and the display is SD they
need it scaled down. Even within HD you have 1280x720 and 1920x1080.
And in many cases the display will not match any of these.
True, wide screen computer monitors are usually not the same as the HD
format. However, these are flat panel displays. They have internal
scan converters if the video is displayed full screen.
OTOH, it would certainly speed things up for display at less than full
screen. Note that a hardware converter would probably be limited to
1/2X to 2X although I think that the TI chip does more (too bad it
doesn't have a wide enough memory bus).
d) Include a separate decoder chip. (If there is one that is
documented, and is usable with the architecture.)
It could just be a CPU chip doing it in software.
Where do you get a CPU that is fast enough?
IIUC, if the CPU was only used to decode MPEG video, it wouldn't need to
be that fast.
--
JRT
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