RGBlink VSP 168S User Manual page 20

1. Brief Introduction
Terms and Definitions
 "MPEG": Motion Picture Expect Group. A standard committee under
the auspices of the International Standards Organization working on
algorithm standards that allows digital compression, storage and
transmission of moving image information such as motion video,
CD-quality audio, and control data at CD-ROM bandwidth. The MPEG
algorithm provides inter-frame compression of video images and can
have an effective compression rate of 100:1 to 200:1.
 "NTSC": The color video standard used in North America and some
other parts of the world created by the National Television Standards
Committee in the 1950s. A color signal must be compatible with
black-and-white TV sets. NTSC utilizes an interlaced video signals,
525 lines of resolution with a refresh rate of 60 fields per second (60
Hz). Each frame is comprised of two fields of 262.5 lines each, running
at an effective rate of 30 frames per second.
 "Operator": Refers to the person who uses the system.
 "PAL": Phase Alternate Line. A television standard in which the phase
of the color carrier is alternated from line to line. It takes four full
pictures (8 fields) for the color-to-horizontal phase relationship to
return to the reference point. This alternation helps cancel out phase
errors. For this reason, the hue control is not needed on a PAL TV set.
PAL, in many transmission forms, is widely used in Western Europe,
Australia, Africa, the Middle East, and Micronesia. PAL uses 625-line,
50-filed (25 fps) composite color transmission system.
 "PIP": Picture-in-Picture. A small picture within a larger picture created
by scaling down one of the images to make it smaller. Each picture
requires a separate video source such as a camera, VCR, or
computer. 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.
 "Polarity": The positive and negative orientation of a signal. Polarity
usually refers to the direction or a level with respect to a reference (e.g.
positive sync polarity means that sync occurs when the signal is going
in the positive direction).
 "RJ-45": Registered Jack-45. A connector similar to a telephone
connector that holds up to eight wires used for connecting Ethernet
devices.
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