"The NTSC format—or more correctly the M format (see broadcast television systems)—consists of 29.97 interlaced frames of video per second. Each frame consists of 484 lines out of a total of 525 (the rest are used for sync, vertical retrace, and other data such as captioning). PAL uses 625 lines, and so has a considerably better picture quality."
Is this correct? So NTSC doesn't use all of the lines for picture? Does PAL use all the lines for picture?