Audio Engineering

Compact Disc 523

bits in length. It can conceal, by interpolation, transmission errors up to 12,000 bits in
duration—an ability that has contributed enormously to the sound quality of the
CD player by comparison with the vinyl disc.

From the point of view of the CD manufacturer, it is convenient that the complete CIRC
replay error correction and concealment package is available from several IC suppliers
as part of a single large-scale integrated chip. From the point of view of the serious CD
user, it is preferable that the error correction system has to do no more work than it must,

A B C D E F G H I J K L M N O P Q R

A B C D E F G H I J K L M N O P Q R

B E K C F I A D J N G L H O R Q P M

Input data

After interleaving

After deinterleaving

After random bit correction

Tape

or Disc

Transmission

Burst error

B C E F H I K L M O P Q R

B E K C F I L H O R Q P M

Figure 16.18 : Burst error correction by interleaving.