DVD

A DVD is similar to a CD but a DVD has much more capacity .A DVD hold 7 times more than a CD.
DVD movie:

• Up to 133 minutes of high-resolution video, in letterbox or pan-and-scan format, with 720 dots of horizontal resolution (The video compression ratio is typically 40:1 using MPEG-2 compression.)
• Soundtrack presented in up to eight languages using 5.1 channel Dolby digital surround sound.
• Subtitles in up to 32 languages

Specification	CD	DVD
Track Pitch	1600 nanometers	740 nanometers
Minimum Pit Length (single-layer DVD)	830 nanometers	400 nanometers
Minimum Pit Length (double-layer DVD)	830 nanometers	440 nanometers