CAM - This type of VCD was recorded by someone in a cinema with a camcorder. The picture quality and sound varies from OK to poor.
Telesync (TS) - Also recorded in a cinema but usually with a high-end camera and a separate audio source; These are generally decent to good quality.
Telecine (TC) - Done a number of ways, all from taking directly from the reel. Ripped in either widescreen (letterbox) or in full-screen (pan and scan) with excellent audio and video. The most common way is to get a device that you attach to the reel that generates a VHS tape of the reel. (called a telecine machine, but there are other machines that generate a digital output of both audio and video that are then put into a VCR, laptop or pc, and made into a VCD).
Screener - A Screener is usually recorded from a promotional video tape or DVD which is sent to censors and film critics etc.. The quality is usually as good as a commercial product, some times a copyright message appears on the screen.
Work-Print - Each frame of the film is copied from celluloid (or another source), these are sometimes incomplete movies. The sound is usually perfect and the visual quality can vary.
LD/DVDRip - VCDs with this on the cover are ripped from DVD or Laserdisc versions of the film and the quality is as good as genuine VCDs.
