New Electronics Reviews

A Blu-ray Disc (BD) is the name of a next generation optical disc format for the storage of digital information including high definition (HD) video. This disc format has been jointly developed by the Blu-ray Disc Association (BDA), which is a group of the world's leading consumer electronics, personal computer and media manufacturers, that include Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Philips, Samsung, Sharp, Sony and TDK to name a few.

The format also has broad support from seven of the major eight movie studios such as Disney, Fox, Warner, Paramount, Sony, Lionsgate and MGM, as a successor to today's DVD format. Five of these major studios have agreed on releasing their movies exclusively in the Blu-ray format.

The format was developed to enable recording, rewriting and playback of HD video, as well as for storing large amounts of data. The 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.


Difference between Blu Ray and DVD

Blu-ray Disc represents an increase over DVD capacity by five to 10 times. This is due, among other reasons, to the usage of a blue laser rays instead of red laser rays used by DVDs. BD also has improved lens specifications compared to DVDs, allowing for a much smaller focus laser beam which enables the recording of much smaller and higher density pits on the disc.

In Blu-ray Discs there is less distortion because of the data layer being closer to the laser lens which is not a case in DVDs. This feature gives Blu-ray Disc significantly improved tolerances, more precision and ultra-high storage densities than DVDs.

Currently Blu-ray disc’s holds 25 gigabytes to 50 gigabytes of data with a maximum possible capacity of 200 gigabytes, while DVD’s or HD DVD’s hold 15 gigabytes to 30 gigabytes with a maximum of 60 gigabytes. A Blu-ray Disc can hold HD Video capacity of 5 hours while HD DVDs can hold only 3 hours of HD Video.

Blu-ray has found favor Blu-ray from many consumer electronics, computer companies and major movie studios while DVD has a few backing it namely Universal Pictures, Intel and Toshiba. There are a few companies such as Hewlett-Packard, Paramount and Warner Bros., who have pledged their support to both formats.

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