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Dictionary of Technical Terms - Q

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Num

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.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Num
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