Monitoring and Control of Audio-to-Video Delay in Broadcast Systems

We have come to expect much of television over the last decade, including increased channel capacity and video and audio quality improvements due in large to new digital processing capabilities. However, one of the first viewer determinates of television program quality has proven to be the proper and consistent synchronization of the visual and audio signal elements, otherwise referred to as lip-sync timing. This paper will provide a brief overview of the reasons for the increasing audio-to-video delay problems, discuss the thresholds for audio-to-video delay perceptibility that have been accepted in recent documented studies, and introduce a new “in-service” A/V delay measurement and auto-correction method based on digital watermarking of video signals.

Published

2001-11

Content type

Original Research

DOI

10.5594/M00964

ISBN

978-1-61482-935-5