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marrirohit
Observer
Observer
2,540 Views
Registered: ‎10-29-2012

Limited range and full range dependency of colorspace converter

Hi ,

  Limited_full_ranges.png

The above table describes the maximum and minimum value of components in limited range and full range , from first table it is clear that RGB have min value 0 and max value 2^8 , 2^10, 2^12 , 2^16 as per color depth , but what is the relation between Valid range , Black level and Nominal Peak level , and for Cb/Cr the nominal level value is mentioned as 0 and 255 , what does that mean. is there any dependency of this table in color space conversion. Please explain. I tried alot but not able to link the relation

 

Thanks

Rohit Marri

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2 Replies
balkris
Xilinx Employee
Xilinx Employee
2,536 Views
Registered: ‎08-01-2008

  The valid range are calculated by clamp or truncate the invalid triplet value to the valid component range of RGB color spaces.

 

Read this third party link to understand this in details

http://www.google.com/patents/US5946113

Thanks and Regards
Balkrishan
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marrirohit
Observer
Observer
2,511 Views
Registered: ‎10-29-2012

Hi ,

   If my component bit depth is 10 , and if im performing RGB to YCbCr conversion and according to configuration if device is in limited range support then what should be minimum and maximum values of Y-Component , Cb- Component , Cr- Component , What does "64 and 960" of Cb/Cr in that case mean.

 

Thanks

Rohit Marri

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