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NTSC Video
Optical Screen
PAL Video
Pixel
Pixel Phase
Pixel Tracking
Presentation Level
Projector-to-Screen
Distance
Protocol
Pull-down List
QuVis
Rear Screen
Resizing
Resolution (lens)
Resolution (projector)
Retrace Time
(Horizontal)
A video output format of some video tape and disk players. There are two types of
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NTSC (National Television Standards Committee) video: NTSC 3.58 and NTSC
4.43. NTSC 3.58 is used primarily in North America and Japan. NTSC 4.43 is less
commonly used.
A type of rear-projection screen which re-directs light through the screen to increase
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image brightness in front of the screen. Screen gain is usually greater than 1 but
audience viewing angles are reduced.
PAL (Phase Alternating Line) video is a 50 Hz standard with 768 x 576 resolution. It
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is found on some video tape and disk players (used primarily in Europe, China and
some South American and African countries).
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The smallest discernible element of data from a computer-generated image.
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The phase of the pixel sampling clock relative to incoming data.
The frequency of the pixel sampling clock, indicated by the number of pixels per
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line.
The projector is at presentation level when an image from a source is displayed
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without the presence of a slidebar, menu, pull-down list, or error message.
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The distance between the projector's front feet centers and the screen. Also called
"Throw Distance".
The type of code format called "A" or "B" utilized by the remote keypad(s). The
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default protocol set at manufacture is Protocol "A". By using two different keypad
protocols, adjacent projectors can be controlled independently with their remote IR
keypads.
A selectable menu item that unfolds into a list of options pertaining to it.
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A manufacturer of a digital video recorder/player/server, QuBit, frequently used for
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providing digital cinema data. QuVis image compression uses a proprietary
technology called Quality Priority Encoding, based on wavelets, in which the user
selects a quality level based on signal-to-noise ratio. The data rate varies to
efficiently maintain that quality level. Frames are coded individually.
A translucent panel for screen projection. Incident light travels through the incident
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surface of a rear screen and forms an image on the other surface.
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The ability to manipulate through software commands the physical size, placement
and/or aspect ratio of an image.
The maximum number of alternate white and black horizontal lines that can be
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distinguished on a screen when a photographic target is placed between the lens and a
light source and illuminated by that source.
The maximum number of pixels that the projector can display horizontally and
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vertically across an image, such as 1024 x 768 (called XGA).
The minimum time required for a CRT projector to move the position of the scanning
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spot from the right edge to the left edge.
Roadster/Mirage S+ User's Manual
GLOSSARY
A-5
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