Appendix A - Glossary - Runco Video Xtreme VX-40d Owner's Operating Manual

APPENDIX A
Glossary
Active Line Time
Ambient Light Rejection
Analog Video
Anamorphic
ANSI
Aspect Ratio
Auto Source
Bandwidth
Baud Rate
Blanking Time
Brightness
Candela or Candle
Channel
Channel List
Channel Number
Checkbox
Chrominance
Color Gamut
Color Shift
Color Temperature
This appendix defines the specific terms used in this manual as they apply to this projector.
Also included are other general terms commonly used in the projection industry.
The time, inside one horizontal scan line, during which video is generated.
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The ability of a screen to reflect ambient light in a direction away from the "line of best
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viewing". Curved screens usually have good ambient light rejection. Flat screens usually
have less ambient light rejection.
The video output of most computers and videotape machines. Analog video can generate
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a large number of colors.
Having or requiring a linear distortion, generally in the horizontal direction.
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Anamorphic lenses can restore a 'scope' (CinemaScope) or 'flat' format film frame to the
correct wide-screen appearance by increasing its horizontal proportion.
The American National Standards Institute is the organization that denotes the
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measurement standard for lamp brightness.
The ratio of the width of an image to its height, such as the 4:3 aspect ratio common in
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video output. Can also be expressed as a decimal number, such as 1.77, 1.85 or 2.39.
The larger the ratio or decimal, the wider and "less square" the image.
The ability of the projector to automatically recognize and synchronize to the horizontal
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and vertical scan frequencies of an input signal for proper display.
The frequency range of the projector's video amplifier.
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The speed (bits-per-second) at which serial communications travel from their origin.
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The time inside one scan line during which video is not generated. The blanking time of the
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input signal must be equal to or greater than the retrace time of the projector.
In projection, brightness usually describes the amount of light emitted from a surface such
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as a screen. It is measured in foot-lamberts or candelas per square meter.
Unit of measure for measuring intensity of light.
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A collection of measurements stored by the projector for a given input source, including
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frequencies, pulse width, polarity, syncs, channel number and location, user adjustable
display settings, etc. Use channels to switch between a variety of setups quickly,
automatically recalling previously defined display parameters.
A list/menu of previously-defined channels available in projector memory.
➤
A number that uniquely identifies a specific channel retained in projector memory. The
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projector can retain up to 99 channels.
A menu item that indicates whether an option is currently in effect (checked) or not
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(unchecked).
The signal representing the color information (hue and saturation) when the image is
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represented as separate chrominance and luminance. Same as "chroma".
The range of colors allowed in a specific system, as defined within a triangular area located
➤
on the CIE color locus diagram whose corners are the three primaries defined in the
system. Also known as color space.
A change in the tint of a white field across an image.
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The coloration (reddish, white, bluish, greenish, etc.) of white in an image, measured using
➤
the Kelvin (degrees K) temperature scale. Higher temperatures output more light.
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