Glossary - Video and Display
* not in alphabetical order, to find a term goto "FIND on this page in menu bar"
CRT             cathode-raytube
The tube of a television or monitor in which rays of electrons are beamed onto a phosphorescent screen to pro­duce image
Horizontal Vertical Scan
The frequency in KHz at which the monitor is scanned in a horizontal/ vertical direction. High horizontal scan rates produce higher resolution
Interlaced
A method of scanning a screen which results in the alternate lines being drawn with each full pass of the electron beam
LCD              liquid crystal display
A display technolo­gy that relies on polarizing filters
 and liquid ­crystal cells rather than phosphors  illuminat­ed by electron beams to produce an on-screenimage. To control the intensity of the red, green, and blue dots that comprise pixels, an LCD's control circuitry applies vary­ing charges to the liquid-crystal cells through which polarized light passes on its way to the screen. The amount of light that makes it through to the screen depends on the amount of charge applied to the corresponding cell and thus the degree to which the light is "twisted" before it passes through a second polarizing filter and a red, green, or blue color mask.
MDA             Monochrome Display Adapter
Black and white display
MCGA          MultiColor Graphics Array
320 pixels
across by 200 pixels down with 256 colors out of a possible 262144 
Mickey
A Mickey is a unit of measure­ment typically set at 1 /200th of an inch. It is commonly used to designate the shortest distance that a mouse cursor can travel on the video display tube.
NTSC              National Television Standard Committee
An American body which gave its name to the television systems
used In the US 
Palette
The range of colors from which you select the actual colors the video adapter will dis­play simultaneously
PAL                  Phase-alternating line
The television standard used in the UK and most of Europe, except France.
Pixel
A single dot on a CRT display.
The word is derived from PICture and Element
Future Connector
The set of end-connectors on the top of your VGA card used by Graphics adapters to give compatibility with VGA text and graphics codes for use with multi-media applications
Refresh Rate
Vertical scan rate (in Hz), the speed at which a screen is repainted. Color displays must be refreshed 60 times per second. The faster the refresh rate, the less flicker a monitor has.
VGA                  Video Graphics Array
An analogue graphics standard introduced with the IBM PS/2 se­ries.
VRAM                Video Random Access Memory
for display­ing and caching video information on a video card
BIT
The number of bits which represent each pixel on screen. An 8 bits per pixel (bpp) card can generate 256 colours, and 24 bpp yields 16.8 million colors.

Graphics and Video
OCR         Optical character recognition
Describes devices or software that can recognise typed text, such as ordinary paper documents. Light is reflected off the document to be read, the result detected, and the pattems produced compared with ones already stored. If a match is made, the character is 'recognised' and stored as an Ascii-type code; thus the printed page is converted into a text file which can be edited as required
OOA        Open documents architecture
A standard, defined by both ISO and the CCITT, which allows documents containing graphics, text, spreadsheet data and so on to be passed between computers and software of different manufacture
MPEG     Motion Picture Experts Group
A multimedia video play­back standard that allows digital video to be compressed using a combination of JPEG image compression and a sophisticated form of differencing--encoding a video sequence by recording differences between frames rather than entire images of each frame. There are two MPEG standards: MPEG-l, which supports a playback quality roughly equal to that of a VCR, and MPEG-2, which supports high-quality digital video. MPEG-l is the form normally used with personal com­puters. See also JP
MUX       MUltipleXer
A device that interleaves multiple data streams from different sources into a single stream
Diagrams
CGA Cable Diagram  EGA Cable Diagram
Ethernet #1 Cable Diagram Ethernet #2 Cable Diagram
Floppy Cable Diagram Game Port Cable Diagram
IBM CGA Cable Diagram ISA 8 Cable Diagram
ISA 16 Cable Diagram Joystick Cable Diagram
LPT #1 Cable Diagram LPT #2 Cable Diagram
LPT #3 Cable Diagram LPT Laplink Cable Diagram
Motherboard Power AT Diagram MIDI Cable Diagram
Power Molex Cable Diagram Null Modem #1 Cable Diagram
Null Modem #2 Cable Diagram Null Modem #3 Cable Diagram
Null Modem #4 Cable Diagram RJ45 Cable Diagram
SCSI Cable Diagram Serial DB-9 Cable Diagram
Serial DB-9/25 Cable Diagram Serial DB-25 Cable Diagram
Serial Wrap Cable Diagram Telephone Cable Diagram
USB Cable Diagram VGA Cable Diagram
Wrap LPT Cable Diagram
Central Processing Units
Video and Display
General Hardware
Memory and Storage
Software
Audio
Communications
Programming
  


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