9 Compact disc encoding

A substantial amount of information is added to the audio data before the compact disc is recorded. Figure 9.1 illustrates the encoding process and shows the various information to be recorded.

There are usually two audio channels with 16-bit coding, sampled at 44.1 kHz. So, the bit rate, after combining both channels, is:

44.1 × 16 × 2 = 1.4112 × 106 bit s–1

image

Figure 9.1 The encoding process in compact disc production.

CIRC encoding

Most of the errors which occur on a medium such as CD are random. However, from time to time burst errors may occur due to fingerprints, dust or scratches on the disc surface. To cope with both ...

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