entertainment service provider. Using the most advanced
satellite
technology,
DIRECTV
delivers access to more than 250 channels of programming to homes and businesses that have
DIRECTV
receiving equipment, which features a small
satellite
dish, a digital set-top receiver and a remote control. The
DIRECTV
service offers an incredible selection of entertainment for every member of the family — all in the digital-quality picture and sound that
DIRECTV
is known for.
HOW
DIRECTV
WORKS
DIRECTV
first launched its service in the summer of 1994. According to industry statistics, the
DIRECTV
System became one of the fastest selling consumer electronics product ever to enter the market — faster than color
TV
s, CD players The
DIRECTV
Systemincludes a small
satellite
dish (which is an antenna for receiving a
satellite
broadcast signal); a digital integrated receiver/decoder (IRD), which separates each channel, and decompresses and translates the digital signal so a television can show it; and a remote control.
DIRECTV
programming is distributed by six high-power
satellite s
: four built by Hughes Electronics Corp. (DBS-1, DBS-2,
DIRECTV
1-R, and D4-S), and two built by LORAL (
DIRECTV
5, 6). Each
satellite
has multiple transponders that relay the
DIRECTV
signal from the broadcast centers to home
satellite
dishes. The D4-S
satellite
is a "spot beam"
satellite
which allows signals to target specific areas within the U.S., and is used by
DIRECTV
to deliver local programming. The "spot beam"
satellite
has five antennas and multiple feeds. Each feed projects its particular signal onto a special location on one of the antennas. The antenna is specifically shaped to bounce the signal to a specific location in the continental U.S.
All
DIRECTV
satellite s
are located in geosynchronous orbit 22,300 miles above the earth.
DIRECTV
provides service from three orbital locations under authority granted by the Federal Communications Commission (FCC). After the
DIRECTV
Systemis installed — a process that includes aiming the dish at the
satellite s
— no adjustment is necessary to change programming because the
satellite s
remain in the same location in the sky. The dish never has to track the
satellite s
, so there's no waiting for the picture to come in and little maintenance required.To gather programming content, ensure its digital quality, and transmit the signal up to the
satellite s
,
DIRECTV
created two of the most sophisticated digital broadcast centers in the world — in Castle Rock, Colorado, and Los Angeles, California. Programming comes to the broadcast center from our content providers (CNN, ESPN, etc.) via
satellite
, fiber optic cable and/or special digital tape. Most
satellite
-delivered programming is immediately digitized, encrypted and uplinked to the orbiting
satellite s
. Some programs are copied to professional video servers by the broadcast centers' state-of-the-art automation equipment to be broadcast later.
The
satellite s
retransmit the signal back down to each customer's
DIRECTV
satellite
dish. Before any recorded programs are viewed by customers, technicians use sophisticated post-production equipment to view and analyze each tape to ensure audio and video quality. Professional video layout servers have playback of a program triggered by a computerized signal sent from the broadcast automation system. Back-up video playout servers ensure uninterrupted transmission at all times. If you're familiar with multimedia computers, you may have heard of MPEG, which stands for Moving Pictures Experts Group. MPEG is a technology that can compress a moving image so it takes a tiny fraction of the space it normally would for transmission. Uncompressed digital images can be enormous; about ten or twenty seconds would fill up the hard drive on a home computer. Even compressed, digital moving images are very large. Consider this comparison: Your telephone modem can transmit information at up to 56 thousand bits per second. At
DIRECTV
, each of the transponders on the
DIRECTV
1-R and DBS-2
satellite s
can send about 30 million bits of information per second to a
DIRECTV
System, or more than 500 times what a normal PC modem can handle. This data transmission rate enables
DIRECTV
to retransmit detailed moving digital video signals to subscribers.
DIRECTV
programming and all
DIRECTV
Receiversemploy MPEG-2 technology, the emerging world standard for digital broadcasts.