Useful CCTV definitions (Helpful for understanding Spec sheets)
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Manual iris: An iris whose size is altered manually.
Matrix: A rectangular network of input and output channels.
Matrix switcher: Used for switching more than one electronic device to more than one electronic device. More robust than a video switcher
Monochrome: Black and white video.
MPEG: Motion Picture Experts Group. A group which recommends standards for digital video.
MPEG-1: A standard recommendation for compressing scanned images. 1.5 to 3.5 Mbps bit rate.
MPEG-2: A standard recommendation for compressing scanned images. 1.5 to 100 Mbps bit rate. Used in HDTV and DVDís.