When playing back audio/video streams, many playback devices try to
recreate the audio and video clocks used for encoding. One means
typically employed to recreate such clocks includes the use of a Phased
Locked Loop (PLL) circuit. The audio and video should remain
synchronized. However, many reasonable cost PLLs cannot recreate the
exact video clock used for encoding. The synchronization of the video to
the audio can be resolved by adjusting one or more of the dimensions (or
other variables) that define the video being recreated. Changing the
dimensions (or other variables) of the video allows for an adjustment of
the output frequency of the PLL to a value that can be implemented.