[M4IF Technotes] YCrCb to RGB conversion

Wed May 7 10:22:31 EDT 2003

Hi Wesley,
 This method is correct in DSP terms. The difference in implementation could be the filters that are actually used. One more thing to be aware of is if you are working with interlaced or progessive frames. The spatial relations between Chroma and Luma are different between the two scans. For interlaced scan a different set of filter taps would be required. It seems this site explains only the case for progressive conversions.
Do the yuvtoavi tools support interlaced standard conversion?
Regards,
Gerardo
-----Original Message-----
From: Wesley De Neve [mailto:Wesley.DeNeve   ugent.be] 
Sent: Wednesday, May 07, 2024 6:12 AM
To: technotes   lists.m4if.org
Subject: [M4IF Technotes] YCrCb to RGB conversion
Hi everyone,
does someone know which formulas are implemented by Microsoft's tools for YCrCb 4:2:0 to RGB888 conversion and vice versa (i.e. yuvtoavi.exe and avitoyuv.exe)? It would also be very helpful to know how these tools perform
up- and downsampling.
The following URL provides some information about YCrCb to RGB conversion, but I'm not sure if that explanation matches with the internals of yuvtoavi.exe and avitoyuv.exe:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/YUVFormats.asp
Thanks,
Wesley De Neve
-- 
Ghent University
ELIS / Multimedia Lab
<url:http://multimedialab.elis.ugent.be>
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