ABSTRACT
High-defi nition television (HDTV) has many more scan lines than standard defi nition (SD). Generally the lines are between 720 and 1,080, although there is quite a bit of experimentation with more lines. These additional lines, and their scanning strategies, equate to much higher-quality images. For example, a normal consumer cannot see the difference between a 720p the “p” stands for progressive) and a 1080i image (the “i” stands for interlaced), although a trained eye may be able to do so. Because today’s HD has pretty much hit the limits of what normal eyes can discern, going to a higher level of scan lines is not critical.
