JPS6430344A - Error corrector - Google Patents

Abstract

PURPOSE:To cause a probability that an error correction occurs at the time of a high speed reproducing to be rare and to securely detect error data by switching the algorithm of an inner correction corresponding to a reproducing mode. CONSTITUTION:At a storing and reproducing device to encode stored data by a product code to use two or more error correcting codes, the titled device has an inner decoder 104 to select plural decoding algorithms based on a control signal 108 from the outside, and the decoding algorithms of the inner code of the product code are changed according to the reproducing mode. Thus, both when the decoding of an outer code is executed at a regular reproducing and when the decoding of the outer code can not be executed at the high speed reproducing, by selecting the decoding algorithms of the inner code according to respective cases and changing the probability that the error correction occurs, the uncorrectable error generated by the error correction of the inner code can be reduced.