You may feel these symptoms first in your feet and then possibly in your shins: 1  Numbness, tingling and pain. 2  Unsteady when standing, walking. 3  Muscle weakness (including weak ankles) or cramps.
720HD is 1280 x 720 pixels per frame. The highest resolution that the DVD format can support is 720 x 480 pixels per frame for NTSC (or 720 x 576 pixels per frame for PAL), which is at best only 37.5% of the resolution of 720HD.
4. Disc Formats. Since Blu-ray players are steadily replacing DVD players, it is important that they are capable of playing old DVDs so that the movies do not have to be discarded. Blu-ray systems can also be capable of playing audio, video, and MP3 CDs.. Disc Formats. Since Blu-ray players are steadily replacing DVD players, it is important that they are capable of playing old DVDs so that the movies do not have to be discarded. Blu-ray systems can also be capable of playing audio, video, and MP3 CDs.