[opendtv] Re: Microsoft Exec: 1080p HDTV NOT Meaningless

See inline edits.


> Hans
> 
> Well at least I think I passed the "trick question" test.
> 
> What is 1080i725? was this a typo?

Yes a typo: it is 1080i/25 (remember EBU nomenclature is: "active
lines_scanning method/frame rate")




> 
> Unfortunately I will not be at IBC to see your work, but I hope that 
> you will have a paper to share with the list that provides the 
> details of your tests and the results.
> 
> I am also curious to learn how you acquired oversampled 1080@50P 
> content. and what kind of image processing (e.g. down sampling) 
> filters may have been used on the camera that used 1:1 sampling.

we use the SVT (Sweden) test material: 65mm film in 50 fps, scanned to
2160p/50 and then downconverted to 1080p/50, 720p/50 and 1080i/25 (see also
http://www.ebu.ch/en/technical/hdtv/test_sequences.php).

For 1:1 sampling we have used the Sony HDC1500 camera with dual link output
to record 1080p/50 on a server. Downsampling to 1080i/25 and 720p/50 was
done later. For interlacing via pixel/line averaging over 2 frames and for
the 720p/50 via low pass filtering and windowed sinc. One can play a lot
with the interlacing and subsampling methods, so we tried to find a robust
compromise.

Regards,
Hans
  


 
> Regards
> Craig
>  
>  
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