Product guide
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Brilliant Color™ Brilliant Color technology enables
a much broader set of options for manufactures and end
users to adjust color to their individual needs. There are
projectors in the marketplace that supports up to 10 differ-
ent pre-congured modes without impacting average lamp
power or color delity.
Broadcast Server A machine that prepares and
transmits broadcast les received from a Content Manager
machine. Also may refer to the broadcasting software that
runs on this machine, or the Content Manager denition of
the machine’s location.
Buffer An area of computer memory reserved for holding
and compiling sufcient data to begin streaming.
Burn-in Image distortion where phosphors are dis-
colored at a differing rates in a display device such as a
plasma, CRT or SED TV. Usually caused by displaying a
static image for extended periods of time. Screensavers are
used to prevent burn-in on CRTs and plasma displays use
a periodic dynamic single pixel shift of the image to avoid
burn-in.
C
Cache The high-speed computer memory used
to speed up data transfer and store visited web
pages temporarily or permanently.
CAT5 A data and communications cable adopted by the
Telecommunications Industry Association and ISO (Inter-
national Standards Organization); This version of Category
5 uses all four pairs of wires to both send and receive. This
version is formally called ANSI/TIA/EIA 568A-5 or simply
Category 5e. Category 5e operates at up to 350Mhz strik-
ing each of its elements. CCD sensors (imager) are used in
both motion video and still video cameras. (See FIT, HAD,
Hyper HAD, IT)
CEA Consumer Electronics Association. An industry asso-
ciation of over 2,000 electronics manufacturers. Produces
the Consumer Electronics Show, or CES.
CEDIA Custom Electronic Design and Installation As-
sociation. International industry association for home
electronics installation and design related businesses. It
also certies members with professional designations.
Closed Circuit Television Traditionally, a private televi-
sion network broadcasted internally within an organization.
Modern narrowcasting solutions work over the Internet,
deploying custom video and messaging anywhere in the
world.
Closed-Captions Text, including subtitles, which is
added to the video signal. It is referred to as ‘closed’ as it
cannot be seen unless the receiving device requests it.
Coated Optics A variety of materials put on high quality
lenses to minimize the amount of light reected back to the
lamp and the amount of ambient light that mingles with the
focused light leaving the lens. Generally good coatings can
add 15% or more to the lenses brightness. Other coatings
are used for ltering colors.
Coaxial An audio or video cable with a single internal
wire with an outer shield that is ground. In audio, a speaker
type where one speaker is positioned within another larger
speaker’s cone.
Codec An acronym of Compression, Decompression. A
device or a piece of software module responsible for com-
pressing and/or decompressing an encoded media format
such as AVI digital video, translating one le or signal format
into another, ideally with an undetectable loss of quality.
Color Bar The horizontal strip at the top of most Design
menus, used to assign colors to elements and certain
styles. It shows the color chips of the current color set in the
User palette, and also includes the Color Set Switcher.
Color Break-up Image anomaly which looks like a
rainbow at the edge of bright objects on screen. Also called
rainbow effect where sequential color systems, such as
single chip DLP projectors or some LCoS RPTVs, update
color information at different locations on the screen
because of quick movement of screen objects or a viewer’s
gaze. For instance, the red component of a white object will
show at a different location on the screen than blue when
an object moves quickly across because color is being
displayed sequentially. This also occurs with quick relative
movement such as moving your gaze from point to point
across the screen. Most noticeable in bright objects.
Color Depth The number of possible colors in a graphic
image, stored as a given number of bits per pixel. A color
depth of 8 bits provides 256 colors; 16 bits (also known as
“High Color”) provides about 65,000 colors; 24 bits (also
known as “True Color”) provides about 16,000,000 colors.
Color Temperature Color balance of white light which
goes from red to blue as the temperature rises. Measured in
degrees Kelvin, which starts at absolute 0 or –273 degrees
Celsius, color temperature matches the reference standard
of the light being emitted from a carbon block heated to
the stated degrees. For instance, the early morning sun is
around 2500K, which is the same warm light that a carbon
block heated to 2227° Celsius would emit. Heating the
block further to 10000° Celsius would emit the same
bluish light of a blue-sky mid-day sun. Common color
temperatures are 5500 Kelvin (black and white movies) and
6500 Kelvin (standard color lms).
Color Wheel Rotating wheel with 3 or more translucent
color lters used to display sequential color on single
imager light valve based projection devices. The imager
reects or transmits the color component of a given image
when the wheel’s corresponding color lter is affecting the
light passing through to the lens. A 1x wheel cycles through
all colors in 1/60th of a second.
Comb Filter Chrominance and Luminance detail are
preserved with the built-in Comb Filter. Prior to reaching the
electron gun, the composite video signal is broken down
into its separate luminance and chrominance signals as it
passes through the comb lter, which reduces dot crawl
and signal error.
Combing A motion artifact caused by interlace where an
object has moved appreciably within a frame and its new
position is displayed in a different position in one eld over
the other. Looks like the teeth of a comb.
Component Video Component Video is a method of
delivering quality video (RGB) in a format that contains all
the components of the original image. These components
are referred to as luma and chroma and are dened as
Y’Pb’Pr’ for analog component and Y’Cb’Cr’ for digital
component. It is comprised of luminance (Y) and two
chrominance channels of blue minus luminance and red
minus luminance.
Composite Video Composite video is one of the most
common AV connections and is the picture signal com-
bined with synchronization and color information.
Compression Compressed data uses less bandwidth,
saving computer memory space and enabling faster
transmission. In display equipment, compression is used to
convert resolutions, such as from XGA to SVGA, resulting in
a clearer, sharper picture.
Contrast Ratio The ratio between white and black. The
larger the contrast ratio the greater the ability of a video
device to show subtle color details and tolerate ambient
room light. There are two industry methods used: 1) Full On/
Off contrast measures the ratio of the light output of an all-
white image (full on) and the light output of an all-black (full
off) image. 2) ANSI contrast is measured with a pattern of
16 alternating black and white rectangles. The average light
output from the white rectangles is divided by the average
light output of the black rectangles to determine the ANSI
contrast ratio. When comparing the contrast ratio of video
devices make sure you are comparing the same type of
contrast. Full On/Off contrast will always be a larger number
than ANSI contrast for the same video device.
Crestron RoomView Crestron RoomView Connected is
built into projectors enabling direct network connectivity for
remote management of AV networks. Crestron RoomView®
Express software provides enterprise help desk manage-
ment, remote monitoring and control of global AV networks
without any special wiring, hardware or programming.
Once connected to the network, classroom teachers and
presenters can instantly control any installed RoomView
Connected™ projector. With no programming required,
AV and IT managers can globally monitor and control
networked projectors throughout a school, campus, or
corporate enterprise. Adding a Crestron control processor
enables control of all AV devices, lighting and environmental
systems on the network from any Crestron touch screen,
Web browser and Apple® and Android® mobile devices
including iPad™ and iPhone®. By leveraging the Ethernet
port on RoomView Connected projectors and accessing
RoomView, AV managers and support staff can remotely
take control of classroom technology, troubleshoot and
perform remote system diagnostics, track projector usage
and lamp life, log network activity and much more. Remote
capabilities allow efcient scheduling of projector power-off
at preset times, routine maintenance, faster response times
to support calls, alert notications if projectors are discon-
nected, and broadcast messaging of emergency alerts to
all projectors.
Crop To cover up portions of a graphic image that are not
needed by adjusting its top, bottom, and side borders.
Cross Strap An adapter bracket that allows a display to
be mounted to VESA patterns.
D
Daisy-Chainable In electrical and electronic
engineering a daisy chain is a wiring scheme in
which multiple devices are wired together in
sequence or in a ring. Other than a full, single loop, systems
which contain internal loops cannot be called daisy chains.
Daisy chains may be used for power, analog signals, digital
data, or a combination thereof.
Decibel (dB) A logarithmic unit used to express the ratio
between any two levels; normally used to show the differ-
ence between two sound levels. Because it is expressed
on a logarithm scale, it is convenient for comparing values,
which are considerably different.
Deinterlacer Electronic component that converts an
interlace video signal to progressive scan.
Delay Commonly used in sound engineering where a
sound is played back later at different speakers in order
to maintain directionality of original sound. Uses the psy-
choacoustical phenomenon of precedence effect where a
sound is rst heard is where it is perceived to come from
even when coming from multiple places.
Diagonal The diagonal of a screen or at panel can be
computed by using the Pythagorean theorem: squaring the
width, squaring the height, adding them together and taking
the square root. A 100” diagonal 16:9 screen measures
49” high by 87” wide; a 100” diagonal 4:3 screen measures
60” high by 80” wide. Use the Projection Calculator to get
screen dimensions on all common aspect ratios.
Dichroic A mirror or lens that reects or refracts selec-
tive wavelengths of light. Typically used in projector light
engines to separate the lamps “white” light into red, green,
and blue light.
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