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Idiomas disponibles
Idiomas disponibles
Glosario de términos
Term
Description
Document
A document camera can be attached to any projector; however, there
Camera
are projectors that integrate these features either as a camera on an
arm that is attached to the projector or a document scanner that is
built into the body of the projector.
Dolby Digital
A lossy compression system to deliver sound on DVDs, ATSC and
DBS broadcasts in up to 5.1 channels. Also called AC-3. See AC-3.
Dolby EX
Backwards compatible system to add a sixth channel used for the
middle rear playback to Dolby Digital (AC-3) making it 6.1 or 7.1
sound. 7.1 sound uses an additional center rear speaker playing
back a duplicate track. Needs a Dolby EX decoder. See AC-3.
Dolby Pro
An analog 4 channel surround sound system with left, right, center
Logic
channels and a mono rear channel, typically duplicated across 2
speakers. Rear channel is limited to 7KHz and system stores all
channels in a matrix recording on 2 discrete analog channels. Has
difficulty playing back non-encoded material at full fidelity.
Dolby Pro
Updated version of Pro Logic. Offers better performance with playing
Logic II
back non-encoded sources over a surround sound system with full
spatial cues and fidelity.
Downconvert
To convert a higher resolution signal to a lower resolution. For
example, 720p to 480p.
DTV
Digital Television. A system that uses digital signals instead of analog
including the ATSC standards, DBS and digital cable.
Dual Lamp
A Dual Lamp projector has two lamps where one lamp either serves
as an automatic backup to the other lamp or is preprogrammed to
switch at specific intervals. The benefit of this type of lamp system is
it significantly reduces the probability of lamp failure during use.
DVI
Digital Visual Interface. DVI is a standard that defines the digital
interface between digital devices such as projectors, flatscreens and
personal computers. For devices that support DVI, a digital-to-digital
connection can be made that eliminates the conversion to analog
and thereby delivers an unblemished image.
It can also carry an analog signal and comes as DVI-I (integrated
- analog and digital), DVI-D (digital only) and DVI-A (analog only).
Dual link DVI connections add additional resolution capabilities.
Specifications on DVI are available at www.ddwg.org.
Dynamic
The ratio between the highest and lowest levels a device can
Range
perform. For a video device it is a measure of contrast ratio. For an
audio device it is usually stated in dB.
Edge
When more then one projector is used side by side to project wider
Blending
content into a seamless wide image, Edge Blending technology
can be used. Edge blending can be done in the projector or with an
external video processor. Edge blending works to remove the bright
visible band that occurs when two images overlap. Edge blending
will gradually fade out one of the images in the banded zone while
the adjacent image is gradually faded up.
www.infocus.com
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