DirecTV H20 用户指南

About High-Definition

What is HD, and how does it diff er from regular TV? To learn more, here’s some helpful information 

about high-defi nition 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. Following are terms you 

might see used regarding Digital TV broadcasts. Although your DIRECTV HD Receiver is a “true” 
HD receiver, the type of TV or monitor you plug it into (SD, ED, or HD) can aff ect the resolution 

of the TV picture you see. See “Resolutions and  Interlacing” on page 6, for an explanation of  display 

resolutions.

4 SD (standard defi nition) is digital TV that off ers a picture quality that is better than older analog 

televisions.  SDTV  displays images at a resolution of 480i.

4   ED (enhanced defi nition) is digital TV that can  display a higher resolution picture than  SDTV. An 

EDTV can  display at 480i or 480p.

4    HD ( high defi nition) is digital TV that can provide the highest quality picture, at resolutions 

1080i, 720p, 480p, or 480i.

To get the 
best-quality 
TV picture, you 
need an HD TV 
to go with your 
DIRECTV HD 
Receiver.