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Altera_Forum's avatar
Altera_Forum
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15 years ago

VIP Gamma Corrector

Hi, I'm trying to find out what the VIP Gamma Corrector really does. In the application note to the UDX4 High Definition Reference Design (an627.pdf) the Gamma Corrector is used to conver...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Yes, I think the Gamma Corrector really only gives you LUTs. If there was interpolation the bit depth would change.

What do you mean by add/subtract from gamma? I'm afraid I don't quite follow. Do you mean changing the gamma value? That is, of course, always a non linear operation. Is that what you meant?

Ok, so we have established that the gamma corrector is not to be used for applying gamma or removing it, thus converting from and to linear space. Or at least not for high quality applications. Doing a decompression should result in a higher bit depth, and compressing reduces the depth.