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一种比传统CD—ROM光盘容量(550MB～650MB)高7—14倍的高密度光盘即将问世。这种被称为HD—CD的高密度光盘有单面和双面两种。前者容量为4.7GB,相当于7张CD—ROM的容量,后者容量为9.4GB,相当于14张CD—ROM的容量。超高容量的HD—CD的容量可达到17GB。 与传统光盘相比,HD—CD有三项重大改进: (1)缩短了数据轨道之间的距离; (2)节省了各条轨道上用来存放数据的平面和凹槽的面积;
A high-density optical disc that is seven to seven times more powerful than traditional CD-ROM discs (550MB to 650MB) is coming soon. This is known as HD-CD high-density optical discs have one and two sides. The former capacity of 4.7GB, equivalent to seven CD-ROM capacity, the latter capacity of 9.4GB, equivalent to 14 CD-ROM capacity. Ultra-high-capacity HD-CD capacity up to 17GB. There are three major improvements to HD-CDs compared to traditional discs: (1) shortening the distance between data tracks; (2) saving the area of planes and grooves on each track for storing data; and