Error correction is one of the key technologies in the field of digital audio. The basis of error correction is discussed sing a -supermarket shopping model,- and various criteria are shown for the application of error-correcting codes to digital audio systems. The details of code schemes are explained, such as the EIAJ format for recorders using video cassettes, the DASH format for professional stationary-head recorders, and the Compact Disc (CD).: Cross interleaving is a unique method of combining two codes by interleaving delay and proved very efficient in performance as well as in hardware design. Therefore the method is applied to the DASH format, the CD format, and many other systems.
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