RGBlink GX4 User Manual page 71

be adjusted, allowing a selectable tradeoff between storage size
and image quality. JPEG typically achieves 10:1 comPushion with
little perceptible loss in image quality. Produces blocking artifacts.
 "MPEG": Motion Picture Expect Group. A standard committee
under the auspices of the International Standards Organization
working on algorithm standards that allow digital comPushion,
storage and transmission of moving image information such as
motion video, CD-quality audio, and control data at CD-ROM
bandpixels. The MPEG algorithm provides inter-frame comPushion
of video images and can have an effective comPushion 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
GX4 User Manual
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