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.
A standard DVD has storage capacity of 4.7 gigabytes. With new technologies, dual-layer DVDs have about 8.5 gigabytes of recordable space. These discs are distinguished from standard DVDs as DVD+R DL or DVD-R DL. Dual-layer DVDs are engineered with two separate layers of recording space on one side of the disc. The first layer is semitransparent so that the laser can shine through to access the second layer.