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4
Defining High-Definition
Introduction
Defining High-Definition
What is HD, and how does it differ from regular TV? To learn more, here’s some helpful
information about high-definition and your DIRECTV HD Receiver.
Types of TV Broadcasts
Analog TV is the type of TV broadcast you may be most familiar with. If you get your
broadcasts via a standard off-air antenna, it’s the type you receive, and most broadcasts from
local cable companies are analog as well.
Digital TV
is a newer system for broadcasting TV signals delivering higher quality audio and
video. “Digital TV” refers to a television that can receive and display digital images.
4 SDTV (standard definition TV) is digital TV that offers a high picture quality that is better
than older analog televisions. An SDTV can display an image at a resolution of 480i.
4 EDTV (enhanced definition TV) is digital TV that can display a higher resolution picture
than SDTV. An EDTV can display at 480i or 480p.
4 HDTV (high definition TV) is digital TV that can provide the highest quality picture, at
resolutions 1080i, 720p, 480p, or 480i.
See “Resolutions and
Interlacing” on page 6, for an explanation of display resolutions.