ASK nano
User Manual
28
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Colour Temperature:
The colour quality, expressed in degrees Kelvin (K), of a light source. The higher
the colour temperature, the bluer the light. The lower the temperature, the redder the light.
Benchmark colour temperature for the A/V industryinclude5000°K,6500°K,and9000°K.
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Saturation:
Chroma, Chroma gain. The intensity of the colour, or the extent to which a given colour in
any image is free from white. The less white in a colour, the truer the colour or the greater its
saturation. Saturation is the amount of pigment in a colour, and not the intensity.
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Gamma:
The light output of a CRT is not linear with respect to the voltage input. The difference
between what you should have and what is actually output is known as gamma.
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Frame:
In interlaced video, a frame is one complete image.A video frame is made up of two fields,
or two sets of interlaced lines. In a film, a frame is one still image of a series that makes up a motion
image.
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Genlock:
Allows synchronisation of otherwise video devices. A signal generator provides a signal
pulses which connected devices can reference. Also see Black Burst and Color Burst.
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Blackburst:
The video waveform without the video elements.It includes the vertical sync,
horizontal sync, and the Chroma burst information. Blackburst is used to synchronize video
equipment to align the video output.
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ColourBurst:
In colour TV systems, a burst of subcarrier frequency located on the back part of the
composite video signal. This serves as a colour synchronizing signal to establish a frequency and phase
reference for the Chroma signal. Colour burst is 3.58 MHz for NTSC and 4.43 MHz for PAL.
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Colour Bars
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A standard test pattern of several basic colours (white, yellow, cyan, green, magenta,
red, blue, and black) as a reference for system alignment and testing. In NTSC video, the most
commonly used colour bars are the SMPTE standard colour bars. In PAL video, the most commonly
used colour bars are eight full field bars. On computer monitors the most commonly used colour
bars are two rows of reversed colour bars
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Seamless Switching:
A feature found on many video switchers. This feature causes the switcher to
wait until the vertical interval to switch. This avoids a glitch (temporary scrambling) which often is
seen when switching between sources.
●Scaling:
A conversion of a video or computer graphic signal from a starting resolution to a new
resolution. Scaling from one resolution to another is typically done to optimize the signal for input to
an image processor, transmission path or to improve its quality when presented on a particular
display.
●PIP:
Picture-In-Picture. A small image within a larger image created by scaling down one of image to
make it smaller. Other forms of PIP displays include Picture-By-Picture (PBP) and Picture- With-Picture
(PWP), which are commonly used with 16:9 aspect display devices. PBP and PWP image formats
require a separate scaler for each video window .