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Basically, the difference comes down to resolution: Standard EDTV Resolution 853 x 480: typically found on 37″, 42″, 43″ & 46″ plasma screens High-Definition HDTV Resolution 1024 X 768: found on 42″ & 43″ plasma screens 1280 X 768: found on 50″, 61″, & 63″ plasma screens 1365 X 768: found on 50″, 61″, & 63″ plasma screens
