From VideoLAN Wiki
Revision as of 18:19, 10 April 2007 by CkqQct (talk | contribs)
Jump to navigation Jump to search

Abbreviation for Program Clock Reference. For MPEG-2 standards, the clock rate is 27 MHz which clocks the video and audio. If there is a drift rate higher than the spec of /- 500ns, some deocders will lose 'Lip" sync and the color subcarrier my drift.