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Dictionary of Technical Terms - Q
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Q
A designator used to name one of the color
components of the NTSC composite video signal. The formula for
deriving Q from red, green, and blue is .21R - .52G + .31B. The Q
term also designates a color component of an M-Format component
video signal.
quadrature
A 90 degrees (one quarter cycle) phase difference
between two signals.
Quad Split Generator
An option to GVG switchers that splits the screen
into four sections, each section containing a different video
source.
quantizing error
Inaccuracies in the digital representation of an
analog signal. These errors occur because of limitations in the
resolution of the digitizing process.
quantizing noise
The noise (deviation of a signal from its original
or correct value) which results from the quantization process. In
serial digital video, a granular type of noise that occurs only in
the presence of a signal.
quantization
The process of sampling an analog waveform to
convert its voltage levels into digital data.
quiescent current
See idling current.
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