Digital Cinematography, 2nd Edition

6 Chapter 1

To compensate for the application of an

encoding gamma function, an Electro Optical

Transfer Function such as gamma 2.2, gamma

2.4, gamma 2.6, Perceptual Quantizer (PQ) or

Hybrid Log Gamma (HLG) is applied to the sig-

nal going to the monitor or projector so that the

end-to-end response of the image system is visu-

ally linear. In other words, the recorded signal is

deliberately gamma distorted so that after it has

been equally inversely distorted again by the dis-

play device, the viewer sees the correct perceptual

tonal scale of brightness.

ITU-R Recommendation BT.709

ITU-R recommenda ...