Apple TV (1st generation) - Manual (Page 8)

8 Chapter 1 Connect.
What You Need
To start using your Apple TV, you need the following:
Widescreen TV
A widescreen, enhanced-definition or high-definition TV capable of at least one of the
following resolutions:
 1080p
 1080i
 720p
 576p
 480p
Cables
 An HDMI cable, or
 Component video cables, with analog audio cables or an optical audio cable