New optical disc for-mat that can store 50GB on a dual-layer disc the size of a DVD. Competing with HD DVD to be the high-definition replacement for DVD.

Jointly developed by Philips and Sony, BD was the first "next-generation" DVD format to gain widespread industry support. Ultimately, the DVD Forum approved the rival HD-DVD format, proposed by Toshiba and NEC.

The newest disc format (developed by Sony, Matsushita and Philips) which can hold 23–30 GB of data per layer. This is equivalent to about four hours of high-definition video.

Blu-ray is a new high-definition video disc standard that offers up to six times the visual detail of traditional DVDs. Blu-ray discs can hold up to 25GB on a single-layer disc and 50GB on a dual-layer disc. This extra capacity combined with the use of advanced video and audio codecs offers consumers an amazing HD experience.

A next-generation optical disc format developed specifically for recording and rewriting high-definition video, with enhanced storage capacity (25GB single-layer or 50GB double-layer). Thus named because it uses a blue-violet laser rather than the standard red laser used by CDs and DVDs. Jointly developed by the Blu-ray Disc Association and several consumer electronics and PC companies, including HP.

A Blu-ray Disc (also called BD) is a high-density optical disc format for the storage of digital media, including high-definition video.