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Idiomas disponibles
Glosario de términos
Term
Description
NTSC
National Television Standards Committee. Established the first colour
TV standard in 1953 and is the North American standard for video
and broadcasting. Also used in the Caribbean, South Korea, Japan
and South America. A 30 fps signal with 525 lines of resolution of
which 480 to 483 are viewable. Transmitted via a 6MHz channel.
OEM
Original Equipment Manufacturer. A company that gathers
components from other manufacturers and sells under their own
name. An OEM version of a product is supported by the seller, not
the actual manufacturer.
Ohm
Measure of electrical resistance, inductance or reactance.
OLED
Organic Light Emitting Diode. A self-illuminating, energy-efficient,
direct-view imaging system. Uses an organic film sandwiched between
2 transparent electrodes.
Operate 24/7
Projectors that are identified as "Operate 24/7" means that the
projector can operate continuously without a need to shutdown other
than for maintenance.
Optical Digital
Transfers digital signals as light pulses. Also called fibre-optic cable
Cable
and is commonly used to send surround sound from a player to a
receiver/decoder.
Optional
Typically the less expensive projectors come with a built-in lens that is
Lenses
designed to serve a specific type of setting or application. A projector
that supports optional lenses can address a wide variety of installation
needs. This gives a projector great flexibility at an incremental cost.
OSD
On Screen Display. Menú shown on display device screen allowing
display adjustment without having dedicated physical controls such
as knobs or buttons for each adjustable parameter.
Oversampling Multiplies outgoing signal samples in order to more easily filter out
aliased sounds but doesn't create fidelity that isn't there to begin with.
Overscan
Given as a percentage or pixel count, the amount that a particular
display device crops the edges of an incoming video signal. This is
done to ensure the image area contains only picture information.
Pan-and-
A method to fit source material of a different resolution or aspect
Scan
ratio onto another. Sometimes used with computer input when the
input resolution exceeds the resolution of the display device. Used
extensively for broadcast and DVDs, it simply crops the sides of
widescreen material and the transfer operator chooses the best
part of the frame to show. Often an electronic camera pan is used
to change the area being shown. This is used when characters are
talking to each other but one is off screen due to cropping and they
become the focus of the shot.
www.infocus.com
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