Hi -
On Tue, 6 Dec 2005, Stefan M. Fendt wrote:
> Well, I think this heavily depends on the used scaler (and on the one
> watching the result :)... I know an upscaling method which is
Ok - I can agree with that ;)
For casual viewing the results could be adequate. There's also
the usual quality loss from the decode/re-encode cycle - that loss
can be minimized but is not 0.
> (extremely!) slow but yields really good (my opinion -- at least)
> results for 2x upscaling... It is not noticable most of the time. I have
I have seen, at least in the US, a number of DVD players that
upsample DVDs to HD (1280x720p or 1920x1080i) resolution. I have
no experience with them so I can not comment on how good of an
upscaling job they do (in real time of course ;))
> invented that because I thought I would need it for the deinterlacer
> (but I do not...)... it does not fit a LP-Surface (cubic or sinc or...)
Scaling should be extensible to multi-threading - each thread/cpu
could be working on a different frame. That could speed things up
a lot if you have one of those dual dualcore systems :)
> I *never* have seen a TV-Station (at least here in PAL-Land...)
> transmitting a fully "broadcast legal" signal. Nearly everything I know
I have ;)
The primary problem, at least with digital TV streams, is that
stations do not correctly set the PSIP info.
At least in the US the luma component is _very_ tightly controlled
since in an NTSC system Y' being too "hot" can cause interference
with the audio (nasty buzzing sound). Most (not sure about "all")
stations use what are called "clippers" (nick named "legalizers" ;))
to hard clip the luma/chroma to the broadcast safe range.
The chances are very good that the luma/chroma are OK and do not
need to be run thru "yuvcorrect CONFORM".
Cheers,
Steven Schultz
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click
_______________________________________________
Mjpeg-users mailing list
Mjpeg-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/mjpeg-users
