some people already known this.. but with the high increase of R5 movie releases i post the full info of all formats.

CAM: A CAM is a copy made using a digital video camera placed in a theatre, directed at the screen. Sound is usually taken from the camera itself, resulting in poor quality, especially with a noisy audience (assuming the theatre isn't empty). Overall the quality is normally very poor and a TS is normally just around the corner (see below).

TeleSync - TS: A TeleSync is similar to a CAM release as it also uses a digital video camera but uses an external audio source, usually the audio jack available for the hard of hearing. This means the audio quality is improved, but can still be relatively poor due to other noise. In many cases the theatre is empty when the copy is made, or the camera placed in the projection booth resulting in a better picture. Quality can be very variable so it's always suggested to check the sample or screenshots before downloading, and remember that many TS releases are mislabelled CAMs.

TeleCine - TC: A TeleCine is a copy made directly from the movie reels themselves, this is a costly process but does produce good quality audio and video, due to the cost TC releases are fairly uncommon. Again, always check the quality before downloading as it can be quite variable due to the equipment used.

R5 (and R5.LINE): Recently the major movie studios have been releasing retail dvds early in Russia (DVD region 5). They do this to stop the widespread use of pirated telecines (which were once very common). R5 retail is rushed out by the studio, they are basically competing with pirates, so there is little to no cleanup of the film after the telecine process. So the main difference between telecines put out by the pirates is that the R5's are done using pro equipment, professional studios and professional people. The quality of R5 retail is very similar to DVDSCR's, no time is usually spent cleaning up dvdscrs either.

R5.LINE indicates that the R5 didn't have English audio, so has been synced with a direct line audio track.

DVD-Screener - DVDscr: A screener is a pre-release DVD copy of the film sent out for promotion/review reasons. A screener usually has a 'ticker', a few words from the movie company warning against copying the film or words to that effect, the picture can also turn black and white while a ticker appears on screen.. A screener can also contain serial numbers and other info which is intended to indentify each screener in an attempt to trace piracy if it happens, this means such info will have to be blocked out on any copy usually with some big black boxes or blurring added after copying. This serial info can last only a few seconds or the whole film, in either case it will still have to be removed.The aspect ratio is usually letterbox (16:9) and the ticker will usually disrupt the picture. DVDscr can be excellent quality depending on the release groups skill, in many cases not much worse than a future DVDRip release.

DVD Rip: A copy made from a retail DVD, usually excellent quality of sound and video. Many appear PRE retail (before the DVD is available retail) and usually appear a few months after the US cinema launch.

DVD-R: A DVD-R - release is a image of the DVD. A DVD-R release is typically upto 4.7gig for a one sided, one layer DVD (known as a DVD5), and file sizes increase from there for a 1 sided dual layer DVD (DVD9), 2 sided single layer DVD (DVD10) and a 2 sided dual layer DVD (DVD18). DVD-R allow any users with a DVD writer drive to burn a direct copy of the original DVD with all the extras, menus and subtitles (if they havent been removed by the original ripper that is).

720p/1080i/1080p HDTV: HDTV stands for High-Definition Television and as its name suggests, it specifies a higher resolution to the viewable TV image than the existing standards. The specific resolutions used are 720p, 1080i and 1080p, with a native 16:9 aspect ratio and with resolutions of 1280x720 (progressive, hence the p), 1920x1080 (interlaced, hence the i) and 1920x1080 (progressive) respectively. A progressive source contains every horizontal line of the picture in every frame, while an interlaced source transmits half the horizontal lines per frame, with the other half coming with the next frame and is interlaced together.

DivX / XviD: XviD is the most common codec you will find used for nearly all releases, with DivX being used on many older releases. XviD offers good quality at low file sizes and as such is used by nearly all release groups.

now you can check out http://www.vcdquality.com and understand it.