Days of pirated CDs, DVDs numbered

December 6th, 2008 - 7:04 pm ICT by IANS  

Washington, Dec 6 (IANS) The days of pirated CDs and DVDs are numbered, thanks to a novel optical technique developed by researchers in Spain that can differentiate pirated works from the original.A technique developed by researchers at the University of Grenada makes it easy to identify whether a CD has been recorded through legitimate channels or just copied.

The cheap, fast and effective method relies on light diffraction on a CD surface to differentiate between original record and illegal copies, a University of Grenada statement said.

Optical CDs are the most visible means of distribution of digital information worldwide. However, their piracy is a serious problem which causes huge economic losses to legitimate manufacturers.

Original CDs are made by printing, through a process which is profitable for large print runs. However, copies are obtained by performing a series of marks on the surface through the “burning” with laser of commercial recorders on an organic material with which a series of spiral grooves are made in a blank CD.

The technique developed by scientists in Spain has also been tested in DVDs. Researchers intend to develop it for the detection of pirated CDs for state-of-the-art devices like Blue-Ray or HD-DVD.

The discovery has been published in American Journal of Physics and is awaiting a patent.

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