I have at last completed my measurements of long-term drift of the timing of broadcast video frames w.r.t. the 'ideal' 25fps of PAL. Over 10 million frames (10 exp 7), I observe a drift of 14millisec/24h on one particular channel (maybe others have a different drift). And no, this is not simply the system clock drift, it is synchronized with a DCF77 receiver every 30 secs. I dont have PAL norm texts available. Can anyone, broadcast professionals in particular, tell me whether this value is reasonable? Or could it be some more subtle artefact of the measurement process? Season greetings, -- Michel Bardiaux Peaktime Belgium S.A. Bd. du Souverain, 191 B-1160 Bruxelles Tel : +32 2 790.29.41
