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EDTV
Enhanced Definition Television is generally the term for video with picture quality better than NTSC or PAL broadcasts but that which is not sharp enough to be of the HDTV standard. The analog interlace system was never intended for large format displays as pictures can appear jagged and so EDTV adopts progressive scan, whilst still using 480 lines. This is commonly referred to as 480p or 525p if we include the interframe time gap. EDTV is a huge improvement over the interlaced analog systems and SDTV.