Proceedings PaperError Detecting And Correcting System For Optical Memory
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Modern magnetic disk systems are provided with error detecting and correcting (EDAC) systems that are capable of correcting up to 12-bit single burst errors. Development of Optical Disks with densities of 25,000 bits per inch and 10,000 tracks per inch compared to 4,000 bits per inch and 200 tracks per inch for magnetic disks, requires more powerful EDAC system to maintain and possibly improve reliability and performance. This paper presents a comprehensive scheme for error recovery that can be used for Optical Disks. The scheme features a double code with interleaving and capable of correcting any single burst error of length 100 bits or less. The first code is a cyclic code which is used for detection only. The second code is a Fire code and is used for correction. Codes design, interleaving depth selection, encoding, decoding, error correcting techniques as well as implementation are presented. System simulation and the results of the simulation are discussed.