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Motorola BMC User Guide
Video Settings Definitions
p and i Designations
In video resolution settings, the "p" and "i" designations stand for "progressive" and "interlaced."
These terms are used to describe how a TV picture is displayed on the screen.
Video Resolution Formats
720p and 1080i are High Definition (HD) formats. 480p and 480i are Standard Definition (SD) formats.
480i is roughly equivalent to a normal analog TV picture. Analog TV shows broadcast on digital TV
stations are broadcast in 480p or 480i.
HD and SD Aspect Ratios
The aspect ratio is the ratio of the width of a TV picture to its height. HD shows use an aspect ratio of
16:9, also known as "widescreen." SD shows use an aspect ratio of 4:3.
TIP
If you have HDTV, we suggest you set your video output for HD (usually 1080i). However, if
you want to view SD shows in their original 4:3 ratio, we suggest you follow the instructions
on the previous page to change your video output setting to 480i. After the show, you will
want to change the setting back for HD.
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