The T1Q1.5 Video Teleconferencing/Video Telephony (VTC/VT) ANSI Subworking Group (SWG) was formed to draught a performance standard for digital video. Important questions were asked, relating to video digital performance characteristics of video teleconferencing/video telephony: a) Is it possible to measure motion artefacts with VTC/VT digital transport? b) If it can be done by objective measurements, can they be matched to subjective tests? c) Is it possible to correlate the objective measurements of analogue and digital performance specification? The VTC/VT Subworking Group’s goal is to answer these questions. It has become a first step to the process of constructing the performance standard.