CONTENTS

 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