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22 November 1999 Equal and unequal error protection codes for volume holographic storage systems
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Previously derived results for angularly multiplexed Fourier plane holograms show more noise due to interpage cross-talk at the periphery of the recalled hologram. We describe three- dimensional error correcting codes which support equal and unequal error protection for encoding two dimensional information bit arrays to be stored in a volume holographic storage system. These codes support equal error protection such that the information bits are provided the same level of error protection and unequal error protection such that selected groups of information bits are provided different levels of protection. We propose an algorithm for changing from an original equal error protection code to an unequal error protection code programmatically. For raw bit error rates ranging from 10-5 to 10-4, these codes provide corrected bit error rates ranging from 10-14 to 10-12, respectively.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Terry N. Garrett and Pericles A. Mitkas "Equal and unequal error protection codes for volume holographic storage systems", Proc. SPIE 3802, Advanced Optical Data Storage: Materials, Systems, and Interfaces to Computers, (22 November 1999);

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