Terminology Compilation


This is the standard for TV signals used in the UK. It stands for Phase Alternating Line.

Pan and Tilt

A camera mounting device that allows movement in both side ways and up or down.


The smallest cell or area in a picture. The greater number of pixels, the higher the resolution of the scene.


Point-to-Point Protocol over Ethernet.


A specific set of rules, procedures or conventions relating to format and timing of data transmission between two devices. A standard procedure that two data devices must accept and use to be able to understand each other.

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