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Industry Terms
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Industry Terms
A B C D E F G H I J K L M N
O P Q R S T U V W X Y Z
Cable
Carry-on Case
CD-ROM
Ceiling Mount
CGA
Coated Optics
Coder/Decoder (CODEC)
Color Contrast
Color Dynamics
Color Mapping
Color Palette
Color Temperature
Composite Video
Compressed Resolution
Compressed SVGA
Compressed SXGA
Compression Mode
Computer In(put)
Computer Out(put)
Contrast Ratio
Convergence
Cable [top]
Wires and cords used to power and link various pieces of equipment.
Carry-on Case
[top]
Refers to a projector carry case that is small enough to meet airline standards for carry-on luggage This type of case usually does not have sufficient strength or padding for use as checked luggage.
CD-ROM [top]
Compact disc - read only memory. A CD-ROM looks virtually the same as an audio CD. CD-ROMs can hold up to 650 megabytes of information.
Ceiling Mount [top]
The ability to mount a projector to the ceiling. Most projectors, when ceiling mounted, must be hung upside- down. To eliminate image distortion known as "keystoning", ceiling mountable projectors have the ability to electronically invert the image.
CGA [top]
Color Graphics Adapter. This is a older, virtually obsolete, computer video standard. CGA resolution is 640 x 200 pixels with a maximum of 16 colors.
Coated Optics [top]
A process used to modify and improve the optical characteristics of lenses. One of the primary advantages of coating a lens is to minimize the amount of light reflected back to the lamp, and the amount of ambient light that mingles with the focused light leaving the lens. Coatings can improve lens brightness by 15% or more. Coatings can also be used for filtering colors.
Coder/Decoder (CODEC) [top]
An electronic circuit that converts analog signals into digital signals and digital signals into analog signals.
Color Contrast [top]
Refers to the values relationship of the colors used in conjunction within an image. Contrast is required for readability of text, charts and graphs - the more contrast the better the readability.
Color Dynamics [top]
High color dynamics are a result of dynamic range/contrast ratio's. When we describe a unit as having excellent color dynamics, the practical description might be "rich colors, excellent definition, high contrast".
Color Mapping [top]
A method of converting high color computer images for use on lower color display units or projectors.
Color Palette [top]
The total number of colors possible. Sometimes referred to in bits. (8-bit, 16-bit, 24 bit, etc.)
Color Temperature [top]
A method of measuring the "whiteness" of a light source. Metal halide lamps have very high color temperatures compared to halogen or incandescent lights.
Composite Video [top]
A video signal that combines all the color and timing components of the image into a single input line.
Compressed Resolution [top]
A process in which a projector accepts a higher resolution signal and compresses the data down to fit its true resolution. Quality of compressed images varies tremendously. Many projectors offer compressed resolution for handling higher resolution than their true resolution. Some use a simple "line dropping" methods while others achieve varying degrees of higher quality with different "intelligent" algorithms.
Compressed SVGA [top]
Found on XGA projectors, compressed SXGA handling allows these projectors to handle up to 1280x1024 SXGA resolution. As with compressed VGA and XGA image quality is reduced with compression. Mostly SXGA is used by Workstations (SUN, SGI, IBM, HP.), typically used in applications such as medical, life sciences and engineering.
Compressed SXGA
[top]
Found on SVGA projectors, compressed XGA handling allows these projectors to handle 1024x768 XGA resolution. As with compressed SVGA, the quality of the compressed image is reduced. The quality of the compressed XGA image from a given projector is a key factor in the decision process for most people choosing an SVGA projector. This is true as the market shifts from SVGA computers to those with XGA screens.
Compression Mode [top]
A method of displaying images in a reduced size format. See also Compressed SVGA, VGA and SXGA. A compressed image often has light and dark lines and text characters with thick and thin line widths.
Computer In(put) [top]
Typical labeling of connector on a projector or panel where the cable from your computer plugs in.
Computer Out(put) [top]
Typical labeling of connector on a projector or panel where the cable to your computer monitor is connected. This is not available on all projectors and is not usually needed when using a laptop.
Contrast Ratio [top]
A method of measuring the dynamic range. A contrast ratio of 15:1 (passive matrix LCDs), offers washed out colors, little detail, and images that can barely survive with significant ambient light. Projectors with Active matrix TFTs have ratios to 100:1, DLPs from 125:1 and Poly-Si LCDs 200:1. By comparison transparency film (i.e. 35mm slides) have contrast ratios over 500:1.
Convergence
[top]
The alignment of the component red, green, and blue video images on a projected display system. If the convergence is incorrect, color fringes or "ghosts" appear on the projected image.
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