Monitoring and Control of Audio-to-Video Delay in Broadcast Systems
New digital processing capabilities over the last decade have resulted in higher expectations from television, including increased channel capacity and video and audio quality improvements. 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.
- Print ISSN
- 1545-0279
- Electronic ISSN
- 2160-2492
- Published
- 2002-10
- Content type
- Original Research
- DOI
- 10.5594/J16343