CONTENTS

 1 Scope 
2 References 
 3     Definitions  
        3.1     Terms defined elsewhere    
        3.2     Terms defined in this Recommendation       
 4     Abbreviations and acronyms        
 5     Conventions     
 6     The reference television chain       
        6.1     Television program production       
        6.2 Primary distribution
        6.3 Secondary distribution       
        6.4     Presentation           
 7     Main causes for loss of lip-sync    
 8     User requirements for operational monitoring        
        8.1     Operational aspect 
        8.2     Measurement aspect          
Appendix I – Perceptual limits for lip-sync errors     
Appendix II – Detection and adjustment of lip-sync errors     
       II.1 Perceptual verification of lip-sync along television chains      
       II.2 Maintaining lip-sync along the television chain – The ideal solution   
       II.3 Maintaining lip-sync along the television chain – A practical approximate solution