CONTENTS

 1     Scope
 2     References
 3     Terminology
 4     Background on loop latency in contribution circuit for conversational TV programmes
 5     Results of subjective assessment tests on the perceptual impact of loop latency
 6     Conclusions on tolerable loop latency in conversational television programmes
Appendix I - Summary report on RAI's tests on the impact of loop latency
        I.1     Introduction
        I.2     The impact of loop latency on perceived programme quality
        I.3     Expected magnitude of loop latency in a television news environment
        I.4     Conclusions