lution and let it do the scan conversions. Because DVI and HDMI are
mostly compatible, you can connect a
device with a DVI connection to one
with HDMI. You can either purchase a
special cable with one connection
on each end (make sure you get the
correct genders) or use an adapter to
convert between the two.
If you want to connect your computer to your new TV, you will probably
use either a DVI or VGA connection.
For many years, the most common
interface for computer monitors was
the Video Graphics Array (VGA) cable.
This 15-pin high-density “D” connection
carries separate analog RGB signals
along with H and V sync (see Figure
12). Two pins are used to carry Display
Data Channel (DDC, a.k.a. VESA
DDC) information that allows a monitor
to communicate its capabilities to a
graphics adapter inside the computer.
there is constant communication
going on between devices connected
via HDMI. If one device turns off, or if
you try to change sources using an
For Further Info
• Movie showing how DMD and DLP
• Interactive guide to connecting
home entertainment equipment
HDMI switch, it often results in a
complete shutdown of the interface.
Despite being a standard (currently at
version 1.3), there are still incompati-bilities between various devices.
Also, you may be tempted to
connect your TV to a set-top box
using HDMI and let the STB pass the
native video resolution on to the display. This seems like a good idea, but
having the display reconfigure every
time you change channels does not
make for a pleasant viewing experience. In such a case, it would be better to restrict the STB to a single reso-
Apple’s Firewire interface (a.k.a.
IEEE 1394 or Sony’s i.LINK) can be
found on many computers and other
video devices like camcorders and
STBs (see Figure 13). This interface is
most often used to connect computer
peripherals such as disk drives. But it is
also sometimes used to carry digital
video plus audio between devices.
Although most TVs do not have a
direct Firewire connection, other
high-end devices in your home
entertainment system may use them.