Terminology - Gefen EXT-HDMI 1.3-CAT5-ELR User Manual

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 defi nes specifi c electrical
properties of the wire, but it is mostly known as being rated for its Ethernet capability of
100 Mbit/s. Its specifi c standard designation is EIA/TIA-568. Cat 5 cable typically has 3
twists per inch of each twisted pair of 24 gauge copper wires within the cable. CAT-5e
is similar to Cat 5 cable, but is enhanced to support speeds of up to 1000 Megabits/sec.
DDWG
Digital Display Working Group DDWG are the creators of the DVI specifi cation.
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-Bandwidth Digital Content Protection. Created by Intel, HDCP is used with HDTV
signals over HDMI and HDMI connections and on D-Theater D-VHS recordings to
prevent unauthorized duplication of copy written material.
HDTV
High-Defi nition Television. The high-resolution subset of our DTV system. The ATSC
defi nes HDTV as a 16:9 image with twice the horizontal and vertical resolution of our
existing system, accompanied by 5.1 channels of Dolby Digital audio. The CEA defi nes
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
Hot Plug Detect. HPD is an electronic status signal which is used to signal the presence
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
Electronic Data Information Display. EDID is an electronic ID containing the capabilities
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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