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.
Standard DVD Resolution. The DVD format supports a native video resolution of 720x480 (480i). This means that when you put a disc into a DVD player, that is the resolution that the player reads off the disc. As a result, DVD is classified as a standard resolution format.