US 5,631,914 A · Error correcting apparatus

Abstract

An error correcting apparatus including a syndrome calculator for calculating syndromes from input data added with an error correction code, a data memory which is connected in parallel with the syndrome calculator for storing the input data, a syndrome memory to store syndromes calculated by the syndrome calculator, and an error correction processor for executing error correction of the data in the data memory by using the syndromes stored in the syndrome memory. The error correction code is provided in both first and second directions when data is two-dimensionally arranged, and the error correction processor obtains values in which the result of an arithmetic operation for error correction in at least one of the first and second directions is added to syndromes in the other direction. An error position within the input data is detected and corrected again on the basis of the values.

Claims12

Dependent claims

An error correcting apparatus comprising:

syndrome calculating means for calculating first and second syndromes from input data including information codes and error correction check codes;
a data memory which is connected in parallel with said syndrome calculating means for storing the information codes;
a syndrome memory to store syndromes calculated by said syndrome calculating means;
and
error correction means for correcting errors of the information codes stored in said data memory by using the first and second syndromes stored in said syndrome memory and for correcting the second syndrome stored in said syndrome memory by using a result of an error correction executed on information codes stored in said data memory by using the first syndrome.

2 more elements

Dependencies are inferred from the claim text.

Error correcting apparatus

Life of this patent

Error correcting apparatus

Life of this patent

Abstract

Claims12