ultra-DVD stores 10,000 GB of data

A DVD that can store up to 2,000 films could usher in an age of 3D TV and ultra-high definition viewing, scientists say. The ultra-DVD is the same size and thickness as a conventional disc, but uses nano-technology to store vast amounts of information.

Scientists believe it could be on sale. One disc could back up the memory of a computer or record thousands of hours of film.

The breakthrough comes from Swinburne University of Technology, Melbourne, Australia, where scientists created a prototype using 'nano rods' - tiny particles of gold too small to see - and polarised light, in which the light waves only flow in one direction.

Professor Min Gu, whose findings appear in the journal Nature, said: 'We were able to show how nano-structured material can be incorporated on to a disc to increase data capacity without increasing the size of the disc.'

A DVD can hold up to 8.5 gigabytes of information, enough for a movie, several special features and an alternative soundtrack.

Blu-ray discs, which were designed to replace them, can store 50GB, enough for a film and extra features in high definition.

But ultra-DVDs will be able to store ten terabytes - or 10,000GB.

A conventional DVD records music, pictures and computer files as digital code - a series of ones and zeroes. The code is written as a series of pits under the clear surface of the disc and is read by a DVD player's laser.

The technology could help usher in an age of 3D TV or ultra-high definition.

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