Sanyo Electric Co Ltd also displayed a new quadruple density optical disk technology that makes laser-disk quality video possible on compact disks. Engineers in the company’s Hypermedia Research Center have developed a high-density CD-ROM technology that stores four times more data per digital disk. It has a high resolution optical pick-up and a red 635-nanometer semiconductor laser. It offers up to 135 minutes of MPEG-2 data capacity on one 4.7 CD. Potential uses for quad-density CD-ROM include hand-held and pocket size Personal Digital Assistant memories. The quad-density CD-ROM has data signal pits and a recorded track pitch that are half the standard size so four times the usual amount of data can be stored.
