What Does Digital Versatile Disc (DVD) Mean?
A digital versatile disc (DVD) is an optical disc storage medium similar to a compact disc, but with enhanced data storage capacities as well as with higher quality of video and audio formats. Codeveloped by Sony, Panasonic, Philips and Toshiba in 1995, the DVD is widely used for video formats, audio formats as well software and computer files.
Techopedia Explains Digital Versatile Disc (DVD)
A digital versatile disc has a large capacity, starting at 4.7 GB. They are written at a speed of 18-20x and have a video compression ratio of 40:1 with the help of MPEG-2 compression. The materials and manufacturing techniques used in the case of a digital versatile disc are same as that of CDs. The layers in the DVD are made by polycarbonate plastic. Digital versatile discs can be categorized in different ways based on their applications. If they are used for reading only and cannot be written, then they are classified as DVD-ROM. If the DVDs can be used to record any type of data, then they are called DVD-R. If the disc can be read, written and then erased and rewritten, it is called DVD-RW.
