[linux-dvb] AW: Re: HDTV & DVB / VDR (dscaler ..)

[Mirko Morschheuser <mirko@rogal-ingenieurgesellschaft.de>]

rehi all,

i think the following article brings some kind of light to the
interlaced/progressive scan issue:

http://www.hometheaterhifi.com/volume_7_4/dvd-benchmark-part-5-progressive-1
0-2000.html

besides concentrating on NTSC only it basicly explains the backround pretty
understandable. 

I think we all agree that the 2 PC solution with Dscaler and the unnecesary
AD-DA conversion is actually technicaly out of the question.

As long as the DVB Stream is film-source based there schould not be a big
Problem with softwaredeinterlacing. 2 fields schould make one perfect frame
(weave). just remember that some stations (Premiere Cinedom Deluxe for
example) are sending in anamorph with a descent bitrate nowadays.
deinterlacing video based programs such as formula 1 (i hate stairstepped
curves :-)) is more difficult and needs a lot of CPU horsepower. Motion
adaptive deinterlacing should probably be left to special high bucks
faroujda hardware and the like....But who knows, with clockrates gettting
higher maybe its just around the corner.

Does anybody know if the DVB stream contains the same flags as in the Mpeg2
stream on a DVD? Software Mpeg2 decoders usually read these flags and
deinterlace according to them. Therefore you get problems when the DVD
mastering was poor and the flags are set incorrectly.



cu
Mirko



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