Abstract:

This document has, therefore, been designed to answer the many needs of a wide variety of user groups. Directed towards the whole of the international community, it endeavours to recognise both similarities and differences which exist across national boundaries . However, underlying these guidelines is a belief that the needs and aspirations of the users do not vary by geography. This third edition is part of a process that will lead to further revisions and improvements - reflecting changes in TV technology, research technology and user needs of these systems.