What is High Dynamic Range (HDR)?
Films and TV programmes which have been shot in High Dynamic Range appear much closer to the way your eyes see the real world. This is because HDR content is recorded using a Perceptual Quantiser curve that's based on the characteristics of human sight. The results are images with greater detail, texture, depth, and colour response.
This new level of realism has been achieved because of the way HDR expands contrast ratio and colour accuracy. The bright parts of the image become so much brighter, giving images more depth. Meanwhile the colour range has also been expanded to show more shades so that true colour is depicted on the screen as it is in real life.