InFocus Genesis P130 Manual De Instrucciones página 58

Glosario de términos
Term Description
Closed Closed caption (CC) superimposes a transcript of the audio portion
Caption of a video program over the program image. Its primary use is to
provide people that are deaf or hard of hearing the opportunity to
read a transcript of the audio as it is being played. Closed Caption is
also helpful for people learning to read or learning a foreign language.
Closed Caption can also be used to display text unrelated to the
program being viewed, such as weather or news.
Coated A variety of materials put on high quality lenses to minimize the
Optics amount of light reflected 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 filtering colours.
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.
Colour The whitest whites, reddest reds, bluest blues and greenest greens.
Dynamics High colour dynamics are a result of dynamic range/contrast ratios.
Having excellent colour dynamics implies rich colours, excellent
definition, high contrast.
Colour Measure of colour purity. Highly saturated colours emit a very
Saturation narrow band of wavelengths of light instead of the broader spectrum
of frequencies emitted from mixed colours. A display with good
saturation capability will look vibrant.
Colour Colour balance of white light which goes from red to blue as the
Temperature temperature rises. Measured in degrees Kelvin, which starts at
absolute 0 or –273 degrees Celsius, colour 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 colour temperatures are 5500 Kelvin (black and
white movies) and 6500 Kelvin (standard colour films).
Colour Wheel Rotating wheel with 3 or more translucent colour filters used
to display sequential colour on single imager light valve based
projection devices. The imager reflects or transmits the colour
component of a given image when the wheel's corresponding colour
filter is affecting the light passing through to the lens. A 1X wheel
cycles through all colours in 1/60th of a second.
Component Component Video is a method of delivering quality video (RGB) in a
Video format that contains all the components of the original image. These
components are referred to as luma and chroma and are defined 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.
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