MSP 316H
User Manual
18
“JPEG” (Joint photographic Expects Group):
Commonly used method of lossy
compression for photographic images using a discreet cosine transfer function. The
degree of compression can be adjusted, allowing a selectable tradeoff between
storage size and image quality. JPEG typically achieves 10:1 compression 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 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.
“
RS-232”:
An Electronic Industries Association (EIA) serial digital interface standard
specifying the characteristics of the communication path between two devices using
either DB-9 or DB-25 connectors. This standard is used for relatively short-range
communication and does not specify balanced control lines. RS-232 is a serial
control standard with a set number of conductors, data rate, word length, and type of
connector to be used. The standard specifies component connection standards with
