A poorly worded entry that later clarifies that it specifically refers to the number of progressive lines...
Also, regardless of what the signal is transmitted at, the actual rendering of a game is not strictly limited to any particular aspect ratio and thus not limited to the ATSC definition which is horrible for defining the standards within gaming.
If we were going by the signal coming out of the system then every game would be 1080p since upscaling is rather common.
KingsMessenger
![](http://upload.wikimedia.org/wikipedia/en/thumb/5/51/HD_ready_logo.svg/190px-HD_ready_logo.svg.png)
720 vertical lines in widescreen ratio
720p HD (1280×720 progressive @50 & 60 Hz)
1080i HD (1920×1080 interlaced @50 & 60 Hz)
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![](http://upload.wikimedia.org/wikipedia/en/thumb/1/11/HD_ready_1080p_logo.svg/190px-HD_ready_1080p_logo.svg.png)
1080p HD (1920×1080 progressive @24, 50 & 60 Hz)
Refer to http://en.wikipedia.org/wiki/HD_ready_1080p
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Fom http://en.wikipedia.org/wiki/ATSC_Standards
The high definition television standards defined by the ATSC produce wide screen 16:9 images up to 1920×1080 pixels in size
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