TV Resolutions in a Nutshell
The following table gives you a rundown of the resolution, aspect ratio, and number of scan lines for the three types of television (standard-definition TV, digital TV, and high-definition TV).
|Name||Signal Type||Number of Scan Lines||Aspect Ratio||Resolution|
|SDTV||Analog||480||4:3||720 x 480|
|DTV||Digital||480||4:3 or 16:9||704 x 480 or 640 x 480|
|HDTV||Digital||1080i (interlaced) or 720p (progressive)||16:9||1920 x 1080i (interlaced) or 1280 x 720p (progressive)|