TERMINOLOGY
CAT-5/CAT5e
Category 5 cable, commonly known as Cat 5, is an unshielded twisted pair type
cable designed for high signal integrity. The actual standard defines specific electrical
properties of the wire, but it is mostly known as being rated for its Ethernet capability of
100Mbit/s.Its specific standard designation is EIA/TIA-568. Cat 5 cabletypicallyhas 3
twists per inch of each twisted pair of 24 gauge copper wires within the cable. CAT-5e
issimilartoCat5cable,butisenhancedtosupportspeedsofupto1000Megabits/sec.
DDWG
Digital Display Working Group DDWG are the creators of the DVI specification.
DVI
Digital Visual Interface. A digital video standard established by DDWG, designed to
carry uncompressed digital video signals to a Display.
HDMI
The High-Definition Multi-media Interface (HDMI) is an industry-supported,
uncompressed, all-digital audio/video interface. HDMI provides an interface between
any compatible digital audio/video Source, such as a set-top box, DVD player, and
A/V receiver and a compatible digital audio and/or video monitor, such as a digital
television (DTV).
HDCP
High-BandwidthDigitalContent Protection. Created by Intel, HDCPisusedwith HDTV
signals over HDMI and HDMI connections and on D-Theater D-VHS recordings to
prevent unauthorized duplication of copy written material.
HDTV
High-Definition Television. The high-resolution subset of our DTV system. The ATSC
defines HDTV as a 16:9 image with twice the horizontal and vertical resolution of our
existingsystem,accompaniedby5.1channelsofDolbyDigitalaudio.TheCEAdefines
HDTV as an image with 720 progressive or 1080 interlaced active (top to bottom) scan
lines. 1280:720p and 1920:1080i are typically accepted as high-def scan rates.
HPD
HotPlugDetect.HPDisanelectronicstatussignalwhichisusedtosignalthepresence
of absence of a Display device on the output of a digital audio/video interface, usually
an A/V media player, scaler, splitter, etc.
EDID
ElectronicDataInformation Display.EDIDisanelectronicIDcontainingthecapabilities
of an audio/video output device such as an HDTV. Source devices will read the EDID
of a Display or output device in order to know what resolution(s) should be used to
draw a picture and how many channels to use when playing audio.
DDC
Display Data Channel. Provides information which allows rendering of a video picture.
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