But I don't see how the extended version would apply to video LUTs over 8 bits in depth. Using dot notation, the BenQ vcgt for inputs 0, 1, 2, 3, 4,...,255 gives outputs 0.0, 1.1, 2.2, 3.3, 4.4,...,255.255. I assume for a 8 bit LUT the lower 8 bits, i.e. to the right of the ".", are ignored.
A deeper LUT requires a completely different sequence and therefore a differently constructed vcgt; e.g. a 10 bit LUT for linear transfer would have inputs 0, 1, 2, 3, 4,...,1023, with corresponding outputs 0.0, 0.64, 0.128, 0.192, 1.0,...,255.192.
So again I don't see any utility to their vcgt construction as opposed to the reset condition, because I don't see any way that a 8 bit vcgt tag can be used for a 10 bit (or larger) LUT.
Richard Southworth