ITU-R REPORT BT.2216
A perspective of the hierarchy of digital television image systems based on human viewing behaviour
|Publication Date:||1 May 2011|
Recommendations ITU-R BT.601, ITU-R BT.709, ITU-R BT.1201 and ITU-R BT.1769 define a hierarchy of digital television image systems.
This text provides a perspective of those digital television image systems, based on four possible viewing behaviours of humans, related to the human field of view2.
2 This perspective takes into account some well-known characteristics of human sight, namely:
- the image on the fovea covers an area of about 15° of the field of view;
- the field of view typically extends 60° upward, 75° downward, 95° outward and 60° inward (towards the nose) with respect to the horizontal forward-looking direction;
- binocular vision typically spans 120° in the horizontal direction.