Compact disc
Videos
The compact disc is a digital optical disc data storage format co-developed by Philips and Sony to store and play digital audio recordings. It employs the Compact Disc Digital Audio standard and is ca
The readable surface of a compact disc is iridescent because it includes a spiral track wound tightly enough to cause light to diffract into a full visible spectrum.
Dutch inventor and Philips chief engineer Kees Schouhamer Immink was part of the team that produced the standard compact disc in 1980
Sony Discman D-E307CK portable CD player with 1-bit DAC
Pits and lands of a compact disc under a microscope
DVD
Videos
DVD is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan. The medium can store any kind of digital data and has been wi
Compact disc
…alternative to tape for recording and distributing music and could be duplicated without degradation in sound quality. Other newer video formats, such as DVD and Blu-ray, use the same physical geometry as CD, and most DVD and Blu-ray players are backward compatible with audio CDs. CD sales in the United…
The data side of a DVD manufactured by Sony DADC
PlayStation 2, the first video game console to run DVDs
A DVD-ROM drive for a PC