Quote:
Originally Posted by Dude111
Hmmmmmm I dont know why you would have to do that buddy.... Most VCRs send a stable/SYNCED picture that the TV can lock onto,im not sure why your having to do this,im so sorry  |
Most VCRs do NOT send a time-base corrected signal. The problem then is that the H sync timing can change up to +/- a half line when the playback head switches near the bottom of the picture. Older TV sets had long horizontal AFC time constants to reduce horizontal jitter under noisy signal conditions. When VCRs came out, the time constant had to be shortened so the H phase could pull in during the vertical retrace time. This had the unfortunate effect of making the H sync more jittery on weak off-air signals, but that was way less objectionable than the flag-waving on VCR playback.
DVD player output is crystal controlled, is generating perfect sync locally (instead of playing it back), and does not have any horizontal phase jump.