Modern communications and storage channels (such as hard drive channels shown below) use decoders such as Low-Density Parity Check (LDPC) decoders which input soft decisions in order to extract the maximum amount of information from received waveforms. In order for a 2D-RS scheme to create failure tolerance across a number of channels, a RS decoder within each disk channel which corrects only a small number of symbols may be used in conjunction with the LDPC decoder. Many disk drive vendors already use a RS decoder in conjunction with the LDPC decoder so this is nothing new.
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Algebraic Codes >