IEC 62503:2008 provides a subjective (or perceptible) and statistical method of assessment of overall, or end-to-end, difference of delays between real world and reproduced scenes in terms of video and accompanying audio recoded in a medium.
ICS
33.160.01 Audio, video and audiovisual systems in general / Аудио-, видео- и аудиовизуальная техника в целом