Blu-ray is the next-generation optical disc format which was jointly developed by a group of the leading consumer electronics, personal computer and media manufacturers (including Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, TDK and Thomson). This format was developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data. The Blu-ray format offers more than five times the storage capacity of traditional DVDs and can hold up to 25GB on a single-layer disc and 50GB on a dual-layer disc.
Current optical disc technologies such as DVD rely on a red laser to read and write data. The new format uses a blue-violet laser. Blu-ray products can easily be made backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup unit.
Blu-ray allows data to be packed more tightly and stored in less space, which makes it possible to fit more data on a disc. Movie studios have and will continue to releasing new feature films on Blu-ray Disc.