For example if a plasma has a vertical resolution of 480 (Panasonic) but is being used to display 625 lines of analogue TV does it just throw away the extra 145 lines? The only other option that I can see is to break each frame down into polygons and translate to the 480 screen size based on how big each polygon is in relation to the size of the screen. Similarly with 1024 lines (Hitachi) does the display simple repeat some of the broadcast lines, interpolate some new ones or something else? From my experience with LCD monitors it seems that fixed pixel displays simply repeat or throw away the lines of the input source as required. (Alternatively display a lower res input on only part of the screen.) Effectively this means that the display makes text unreadable unless it is being driven by the same res input as its native pixel count.