ITU-R REPORT BT.2216 PDF

Introduction

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.