Japan's Sanyo Electric Co Ltd , Olympus Optical Co Ltd , and Hitachi Maxell Ltd said on Tuesday they have jointly developed a new high-capacity memory disc for use in next-generation digital cameras.

``The high memory capacity is suitable for taking high definition still pictures and moving pictures for long periods of time,'' a spokesman for Sanyo said.

The new rewritable magneto-optical disc has a memory capacity of 730 megabytes, enabling it to store about 20 times more data than memory devices presently used in its digital cameras, he said.

The price and sales date of the new memory disc has not been decided, he said, but added that Sanyo aims to start sales of digital cameras using the new disc by next summer.