Play back of SVCD titles is impaired when played on most DVD players, causing dropped frames, choppy video playback or skipping of sound. This is due to the chosen two-thirds video ratio in the SVCD format specifications, which doesn't align well with the other more common video formats VCD and DVD. Most DVD players support the video formats VCD, SVCD and DVD (with horizontal resolutions of 352, 480 and 720 pixels respectively) but the best resolution usually dictates the design of all the electronics components, most notably the low pass filter. With only one analog low pass filter optimised for one video format (usually DVD 720), the other two video format will suffer from aliasing. The SVCD format is especially prone to "foldover" because the 480p format doesn't fit well over a 720p output. The aliasing artifacts that result from this bad fit are usually buried in noise from other sources, such as camera, quantization, and MPEG artifacts.
