RGB - A color model using red, green, and blue; the additive primary colors. Video display systems use RGB data to create screen images.
Aspect Ratio - A numerical expression of the relationship of width to height of a TV screen. 4:3 - This numerical sequence refers to the aspect ratio of the National Television Systems Committee (NTSC) TV screen, with "4" unit width corresponding to "3" unit height, proportionally, regardless of the actual size of the screen. 16:9 - This numerical sequence refers to the aspect ratio of wide screen DTV formats for all HDTV and some SDTV (Standard Definition) video. A "16" unit width corresponds to "9" unit height proportionally, regardless of the actual size of the screen. The widescreen 16:9 numerical sequence provides a viewing experience very similar to that of 35 mm movies.
Generation Loss - This refers to video degradation caused by successive recordings (dubs of other dubs) from the master source. This is overcome by digital recording.
BPI (Bits Per Inch) - A term defining the density of data in a bitmap image.
Oversampling (CD players) - Multiplying the sampling frequency (44.1kHz) in a CD player to a higher frequency to shift noise components above audible levels. This feature creates a gentler low pass filter with more musical characteristics. This process usually yields a data rate of 352.8 kHz through 8x oversampling.
Compression - Compression refers to the reduction of the size of digital data files by removing redundant and/or non-critical information ("data" being the elements of video, audio and other "information"). Digital TV in the U.S. would not be possible without compression.
Screening - The process of using screens or digital methods to create halftone screen representations of continuous tone images.
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