I just tested my own TV with my WDTV device, which supports all PAL/NTSC and HD settings. My TV (32" Samsung LCD) throws up "Unsupported Format" when trying 576p 50hz and 720p 50hz, suggesting the TV ...

A DVD formatted for the NTSC market. Prior to digital television, NTSC and PAL were the two major analog TV formats, each with different frame rates and lines of resolution. When DVDs were introduced ...