�1���� Functional and operational requirements
������� 1.1���� Number of programmes
������� 1.2���� Range of variable bit rate
������� 1.3���� Compatibility
������� 1.4���� Interoperability
������� 1.5���� Flexibility
������� 1.6���� Extensibility
������� 1.7���� Implementation
�2���� Performance requirement
������� 2.1���� Picture quality
������� 2.2�� ��Recovery time
������� 2.3���� Acquisition time
������� 2.4���� Relative sound/vision delay
������� 2.5���� Delay
������� 2.6���� Error performance
Annex
1� Coding for multi-programme
transmission
�1���� Introduction
�2���� A joint coding control scheme
�