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AVALON H
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User Manual
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Glossary
DVR (Digital Video Recorder)
A DVR is a video storage device that compresses and stores camera data processed in a
digital signal format. This system integrates a screen conversion switch, screen divider, VCR,
sensor and alarm controller, into a single digital recording system. DVRs use technology based on video
algorithm H.264, MPEG, MJPEG etc. to compress and store video data.
H.264
H.264 Advanced Video Compression (MPEG-4 Part 10, Advanced Video Coding) is an industry standard for
video coding. Designed to combine smaller video compression (about one half the size of similar files with
older codec’s) and enhance video quality. H.264 is used in such applications as Blu-ray Disc, IPTV, digital cable
TV, satellite broadcasting, UCC, DMB and Terrestrial broadcasting.
NTP (Network Time Protocol)
NTP is a standard protocol for assigning time in the network.
NTSC (National Television Systems Committee)
The NTSC is the FCC (Federal Communications Commission) and International TV System
Committee, which established the U.S. color TV standard. The NTSC standard was
chosen as the color TV standard for the U.S. in 1953, and later in 1960 by Japan. Korea also adopted the NTSC
standard, after considering the allocated channels and characteristics of the broadcast equipment that was in
use. In most instances, CCTV systems have elected to use the NTSC method.
Non-PC based Equipment
Non-PC-based equipment means equipment that uses an RTOS/Embedded operating system
instead of a standard PC operating system. The main advantage is that the product is highly
stable because it is not built on a PC platform.
PAL (Phase Alternate Line)
PAL is a TV broadcast standard which was developed by the Telefunken Company of
Germany in 1967. The PAL method is a broadcast method with a scanning rate of 25 frames
per second. It has fewer frames compared to NTSC but it has a greater number of straight
scanning lines, with 625. It also has better resolution, with its use of high bandwidth. The
advantage of this method is that it is not affected by phase fluctuation. However the disadvantage
is that it cannot be viewed on black & white TVs. Currently Europe, Australia, China, North
Korea and others have adopted this method
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