Crestron
DM-MD8X8
8x8 DigitalMedia™ Switcher
Down-convert
In DTV, the conversion from a higher-resolution input signal number to a
lower one. For example, some DTV receivers can be set to down-convert an
HDTV 1080i signal to a standard 480i signal that any TV can display.
DRM
Digital Rights Management; a secure technology that enables the copyright
owner of a piece of intellectual property (such as a music, video, or text file)
to specify what a user can do with it. Typically, this is used to offer
downloads that can't be played or burned to CD without paying for a
license.
DTV/Digital television
Generic term that refers to all digital television formats, including high-
definition television (HDTV) and standard-definition television (SDTV).
DVI (Digital Visual Interface)
A digital interface specification created by an industry consortium, the
Digital Display Working Group. This universal standard for connecting flat-
panel monitors is also used for data projectors, plasma displays, and digital
TVs. Using a DVI connector and port, a digital signal sent to an analog
device is converted into an analog signal (if the device is digital, such as a
flat-panel monitor, no conversion is necessary). There are three different
DVI configurations: DVI-A for analog signals, DVI-D for digital signals,
and DVI-I (integrated) for both analog and digital signals.
EDID (Extended Display Identification Data).
The information transmitted from a display to a source announcing its
resolution capabilities.
HDMI (High-Definition Multimedia Interface)
USB-like digital video connectivity standard designed as a successor to
DVI; can transmit both digital audio and video signals; incorporates HDCP
digital copy protection.
Interlaced scanning
Scan method used by the majority of televisions and the 1080i HDTV
format. As opposed to progressive scanning in which the CRT's electron
beam scans or "paints" all lines at once, interlaced scanning TVs paint odd-
numbered lines in succession, then go back and fill in the remaining even-
numbered lines. This method is more prone to artifacts and less stable than
progressive.
KSV (Key Selection Vector)
A set of numbers transmitted between HDCP-protected sources and sinks
(displays/receivers) during the authentication “handshake” to validate that
the devices are authorized to receive the content. Some HDMI sources have
limited buffer space to hold KSVs and as such, can only be routed to a few
HDMI devices before their buffer overflows and content playback stops.
Progressive scan
A method of displaying images on a CRT monitor or a high-definition TV
in which all the lines of a picture are drawn in one quick burst, from left to
right and from top to bottom. Compare this to interlacing, in which every
other line is displayed in two successive swoops to form a complete picture.
SDTV
Standard-definition television. Digital television format that includes 480-
line resolution in both interlaced (480i) and progressively scanned (480p)
formats; offers discernible improvement over conventional analog NTSC
Operations Guide – DOC. 6755A
8x8 DigitalMedia™ Switcher: DM-MD8X8
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