China Video Disc

China Video Disc or CVD (in Spanish Chinese video disc) is a non-standard SVCD video disc, differing from it in that it only has 352 columns of resolution (SVCD has 480), which gives PAL a resolution of 352x576 at 25 FPS (frames per second), and NTSC 352x480 and 29.97FPS. Like SVCDs, its compression is based on MPEG-2. Its resolution is about half that of a DVD.

Despite having less "horizontal resolution", there are cases in which this loss of quality is little appreciated, such as analog television capture, or playback on cathode ray televisions that do not have much & #34;horizontal resolution" (bandwidth). In these cases, while the 576 horizontal lines ("vertical resolution ") are still necessary for high quality (since they are treated one at a time), in vertical a bit of resolution is dispensed with, in exchange for getting a lower bit rate (more minutes on a CD) or reducing the compression of each frame, which will improve the representation of colors, and avoid macroblocks somewhat.

It is now sometimes used instead of SVCD in Internet movie sharing and analog video and TV capture in MPEG-2. It is generally used in the same cases as SVCD but when little importance is given to "horizontal resolution" relative to other video features.