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Anonymous
>>267155 >Actually you can think of SD NTSC TVs as displaying in 720x540.
no, you can't
the simple test is this - plug a 720x540 image into any dvd authoring suite and compose a dvd
the source image will be shrunk down to 720x480, but when extracted from video as a still frame your resolution will drop to 640x480
when discussing televisions, only the vertical resolution is a constant since the WIDTH of pixels (not height) is defferent depending on whether it's NTSC, NTSC 16:9, PAL, or PAL 16:9
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