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IN1508
Scaling Presentation Switcher
VCR
Figure 1-1 — Typical IN1508 Scaling Presentation Switcher application
DVI video
DVI is a digital transmission standard for high-speed, lossless video interfaces,
such as between a computer and a direct digital monitor. The DVI standard, which
Silicon Image Corporation also refers to as PanelLink and PanelLink Digital,
specifies single link and dual link digital versions for either the digital only (DVI-D)
or digital and analog combined (DVI-I) connectors. A single link supports
resolutions higher than HDTV at a reduced blanking interval. The dual link
configuration supports the higher bandwidth demands of displays that do not
support reduced blanking. The IN1508 switcher supports a single link of DVI-D
video.
DVI uses a process called transmission minimized differential signaling (TMDS) for
sending graphics data to a compatible monitor. TMDS is based on an encoding
algorithm that converts 8 bits of data into a 10-bit transition-minimized
DC-balanced signal. The DVI standard, as supported by the switcher, allows for a
single link of 3 channels (red, green and blue) of data, enabling the use of large
pixel format digital display devices.
The IN1508 switcher converts direct digital video to analog RGB video. The
switcher accepts a single link of DVI-D video from a computer or other digital
video source device on a standard 25-pin female DVI-D connector. The Digital Flat
Panel (DFP) video format can be input using a DFP-to-DVI adapter.
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IN1508 Scaling Presentation Switcher • Introduction
RS-232 Control
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Laptop
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Sound System
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