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Digital audio in optical disks
Optical disks are particularly important to digital audio, not least because of the success of the Compact Disc and subsequent devlopments such as MiniDisc, magneto-optical production recorders and DVD. CD, DVD and MiniDisc are worthy of detailed consideration, as they are simultaneously consumer products available in large numbers at low cost, and yet are technically advanced devices. Optical disks result from the marriage of many disciplines, including laser optics, servomechanisms, error correction and both analog and digital circuitry in VLSI form.
12.1 Types of optical disk
There are numerous types of optical disk, which have different characteristics.1 There are, however, three broad groups, shown in
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