Error correction is one of the key technologies in the field of digital audio. In this paper, the basis of error correction is explained plainly using a "supermarket shopping model," and various criteria are shown for the application of error correcting code to the digital audio systems. The details of code schemes are also explained in this article, such as the EIAJ format for recorders using video cassette, the DASH format for professional stationary head recorders, and the compact disc. Cross interleaving is a unique method of combining two codes by interleaving delay and is proven very efficient in performance as well as in hardware design. Therefore, the method is applied to DASH format, the compact disc format, and many other systems.
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