1993 年 17 巻 52 号 p. 19-24
A new ROM type disk system is developed by adopting the MPEG1 coding algorithm and high density optical recording and reproduction technology. Large recording capacity of 2.1 Gbytes/side on a 12 cm diameter disk is attained, and the capacity enables the disk system to reproduce one hour recording of high quality moving pictures and 4-ch audio signals. In order to apply the disk system to karaoke, mass production processes of disks, data formats, MPEG decoder LSIs, and a real time MPEG encoder were developed.