The storage capacity of DVD-R has been boosted to 4.7GB - a 20 per cent increase on the previous 3.95GB discs.

Hitachi Maxell and TDK, yesterday, both announced new DVD-R blank media formats, called DVD-Recordable Disc for General 2.0. The discs will cost around $18. No UK price is available yet.

Each company plans to put on sale two types of discs - one for basic data-recording that can be played back in DVD-ROM and computer DVD drives, and another for storing movies for DVD-video players.

TDK is already selling both versions of its DVD-Rs in the US. Hitachi Maxell said its data disc will go on sale in early December, with the video-compatible product available from January 25 next year.

Pioneer last week demonstrated a new combo-drive that supports both the 4.7GB DVD-R and DVD-RW formats at the Comdex show in Las Vegas. Other companies were also showing drives that included support for the format.