The Digital Fact Book - Quantel

StEMStandard Evaluation Material was created by the ASC (American Society of Cinematographers)and DCI in 2004 to assess the quality of possible digital cinema compression systems andformats against the best that film can offer. It is about 25 minutes of material from multiplefilm formats. At the time the major compression system used for video was MPEG-2 and somesaid the StEM film was an MPEG-breaker with smoky scenes and movement that wouldchallenge that compression system. The next year DCI recommended JPEG 2000, an entirelydifferent compression system.Stencil ®A keying signal used in graphics systems – such as the Quantel Paintbox and the QPaintboxapplication. It can be drawn, derived from picture information, or both. It can be used todefine the area of an object, obscure part or all of an object, making it transparent or partiallytransparent, and used to control the application of paint... and more.StereoscopyThe process of making and presenting images using ‘left eye’ and ‘right eye’ cameras.The resulting ‘left eye’ and ‘right eye’ stereo images allow audiences to perceive depth intoand out of the screen. Although the technique can add greatly to the viewing experienceand is often referred to as ‘3D’, viewers cannot look around objects – as would be the casewith real 3D.PixelsApparent object locationSL and R pixels coincidentEyesScreenL and R pixelscoincidentR L L RLRLRLRLRLRObject pulledtowards viewerObject at screendepthObject pushedinto screenObject at infinity158