Overview
3
3
3 Overview
The high quality Kramer
VS-21HDCP-IR
is an HDCP (High-Bandwidth
Digital Content Protection)
1
compatible
2x1 DVI Switcher
that accepts two
DVI inputs—letting you select either DVI
2
The
VS-21HDCP-IR
:
input using a pushbutton located
on the front panel—and routes the selected DVI input signal to the DVI output.
•
Passes EDID/HDCP signals from source to display
The
VS-21HDCP-IR
lets you read and store, in non-volatile memory, the
EDID
3
•
Is 5V DC fed
block from one or both outputs, so it can then provide the EDID
information to the DVI source even if the display device is not connected.
•
Can be controlled remotely via RS-232, the contact closure REMOTE
input select terminal block connector or the infrared remote control
transmitter
3.1 About HDCP
The High-Bandwidth Digital Content Protection (HDCP) standard
4
3.2 Defining EDID
protects
digital video and audio signals transmitted over DVI or HDMI connections
between two HDCP-enabled devices to eliminate the reproduction of
copyrighted material. To protect copyright holders (such as movie studios)
from having their programs copied and shared, the HDCP standard provides
for the secure and encrypted transmission of digital signals.
The Extended Display Identification Data (EDID
5
) is a data-structure,
provided by a display, to describe its capabilities to the source. The EDID
enables the
VS-21HDCP-IR
to “know” what kind of monitor is connected to
the output. The EDID includes the manufacturer’s name, the product type, the
timing data supported by the display, the display size, luminance data and (for
digital displays only) the pixel mapping data.
1 Note that Kramer Electronics Limited is an HDCP Licensee
2 DVI-D (Digital). Note that only the digital signal (DVI-D) is available on the DVI connector
3 EDID is Extended Display Identification Data
4 Developed by Intel
5 Defined by a standard published by the Video Electronics Standards Association (VESA)
