Gefen ex-tend-it 4x4 DVI Matrix - Manual (Page 14)

DDC
Short form for Display Data Channel. It is a VESA standard for communication
between a monitor and a video adapter. Using DDC, a monitor can inform the video
card about its properties, such as maximum resolution and color depth. The video
card can then use this information to ensure that the user is presented with valid
options for confi guring the display.
DDWG
Digital Display Working Group DDWG are the creators of the DVI specifi cation.
DVI
Digital Visual Interface. Connection standard developed by Intel for connecting
computers to digital monitors such as fl at panels and DLP projectors. A consumer
electronics version, not necessarily compatible with the PC version, is used as a
connection standard for HDTV tuners and displays. Transmits an uncompressed
digital signal to the display. The latter version uses HDCP copy protection to prevent
unauthorized copying.
HDCP
High-Bandwidth Digital Content Protection. Created by Intel, HDCP is used with
HDTV signals over DVI and HDMI connections and on D-Theater D-VHS recordings
to prevent unauthorized duplication of copy written material.
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).
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-defi nition scan rates.
RS-232
Recommended Standard 232. This is the de facto standard for communication
through PC serial ports. It can refer to cables and ports that support the RS232
standard.
VESA
Video Electronic Standards Association, a consortium of manufacturers formed to
establish and maintain industry wide standards for video cards and monitors. VESA
was instrumental in the introduction of the Super VGA and Extended VGA video
graphics standards with a refresh rate of 70 Hz, minimizing fl icker and helping to
reduce user eyestrain and fatigue.
TERMINOLOGY
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