Digital Projection Projector HIGHlite 660 3D Series User Manual

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APPENDIX F: GLOSSARY OF TERMS
Aspect ratio
The proportional relationship between the width and the height of the projected image. It is represented by two numbers separated by a colon, 
indicating the ratio of image width and height respectively: for example\
, 16:9 or 2.35:1.
Not to be confused with resolution.
Blanking (projection)
The ability to intentionally turn off, that is, set to black, areas around the edges of the projected image.\
 It is sometimes referred to as...

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APPENDIX F: GLOSSARY OF TERMS
Chrominance
Also known as ‘C’, this is the component, or pair of components, of an S-Video or Component Video signal which describes color 
difference information.
Cold mirror
A mirror that preferentially reflects or transmits infra-red light. In a projector, a cold mirror is used to reflect the visible component of the lamp 
beam into the illumination optics and transmit the unwanted infrared rad\
iation into an absorber.
Color difference
In S-Video...

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APPENDIX F: GLOSSARY OF TERMS
Contrast (electronic control)
The adjustment of the white point of the image without affecting the black point. This increases the intensity range of the displayed image.
Contrast (optical)
The intensity difference between the darkest and lightest areas of the screen.
Cr, Cb
Color difference signals used with ‘Y’ for digital Component Video inputs. They provide information about the signal color. Not to be 
confused with Pr, Pb.
Crop
Remove part of...

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APPENDIX F: GLOSSARY OF TERMS
DMD™ (Digital Micromirror Device™)
The optical tool that transforms the electronic signal from the input so\
urce into an optical image projected on the screen. The DMD™ of a 
projector has a fixed resolution, which affects the aspect ratio of the projected image.
A Digital Micromirror Device™ (DMD™) consists of moving microscop\
ic mirrors. Each mirror, which acts as a pixel, is suspended between 
two posts by a thin torsion hinge. It can be tilted...

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APPENDIX F: GLOSSARY OF TERMS
Frame rate
The number of frames shown per second (fps). In TV and video, a frame rate is the rate at which the display device scans\
 the screen to 
“draw” the frame.
Frame rate multiplication
To stop low frame rate 3D images from flickering, frame rate multiplication can be used, which increases the displayed frame rate by two or 
three times.
Gamma
A nonlinear operation used to code and decode luminance. It originates from the Cathode Ray Tube...

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APPENDIX F: GLOSSARY OF TERMS
Horizontal Scan Rate
The rate at which the lines of the incoming signal are refreshed. The rate is set by the horizontal synchronization from the source and 
measured in Hertz.
Hs + Vs
Horizontal and vertical synchronization.
Hue
The graduation (red/green balance) of color (applicable to NTSC).
Interlacing
A method of updating the image. The screen is divided in two fields, one containing every odd horizontal line, the other one containing the\...

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APPENDIX F: GLOSSARY OF TERMS
Letterboxing
Black margins at the top and bottom of the image. Letterboxing appears w\
hen a wider image is packed into a narrower frame without 
changing the original aspect ratio.
Lumen
A photometric unit of radiant power. For projectors, it is normally used to specify the total amount of emi\
tted visible light.
Luminance
Also known as ‘Y’, this is the part of an S-Video or Component Video signal which affects the brightness, i.e. the black and...

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APPENDIX F: GLOSSARY OF TERMS
Pillarboxing
Black margins at the left and right of the image. Pillarboxing appears w\
hen a narrower image is packed into a wider frame without changing 
the aspect ratio.
Pixel
Short for Picture Element. The most basic unit of an image. Pixels are arranged in lines and column\
s. Each pixel corresponds to a micromirror 
within the DMD™; resolutions reflect the number of pixels per line by the number of lines. For example, a 1080p projector contains...

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APPENDIX F: GLOSSARY OF TERMS
RGB (Red, Green and Blue)
An uncompressed Component Video standard.
S-curve
A factor applied during edge blend to gradually reduce the light output within the blend region so the combined light output of all overlapping 
images remains a constant. Without an s-curve overlapping areas would be\
 brighter than the rest of the image due to accumulated light from 
more than one projector. 
S-Video
A video signal which has separate Y and C signals....

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APPENDIX F: GLOSSARY OF TERMS
SPDIF
Sony/Philips Digital Interface. A digital audio interface standard.
SX+
A display resolution of 1400 x 1050 pixels with a 4:3 screen aspect ratio. (Shortened from SXGA+, stands for Super Extended Graphics 
Array Plus.)
Synchronization
A timing signal used to coordinate an action.
Test pattern
A still image specially prepared for testing a projection system. It may \
contain various combinations of colors, lines and geometric shapes....