HD resolutions


So the basic resolutiions these days are 480i, 480p, 720p, 1080i, and 1080p. Why is there no 720i?

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I think it's because there's no need for 720i. 480i was needed to be compliant with the old NTSC interlaced TV. 1080i was a compromise because 1080p compliant displays required excessively high scan rates.

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