Sony doubles the density of compact discs.

Sony Corp has developed compact disc (CD) formats that double the data capacity of its CD read-only memory (CD-ROM), CD readable (CD-R) and CD readable-writable (CD-RW) media to 1.3GB from the current 650MB.

Because the double density CD formats share the same basic specifications as conventional discs, they can be produced comparatively cheaply, using existing production technology and facilities.

The 1.3GB data capacity has been achieved by employing an extended error correction