JPS56161736A - Error correcting device - Google Patents

Abstract

PURPOSE:To reduce the redundancy without lowering the entire error correcting ability and to increase the transmitting efficiency, by using two types of an error correction code and an error detection code for a code train, and correcting the error in the error detection code by the error correction code. CONSTITUTION:Data inputted from an input terminal 1 is separated into two code groups at a distribution circuit 2, a redundant code is added with an error correction code forming circuit 3 and an error detection code forming circuit 4, respectively and the output of the circuits 3, 4 is alternately located at a synthesis circuit 5, and after it is stored at an interleave circuit 6, it is read out in the different order and transmitted to a line 7. At the reception side, the reception data is returned to the original order at an interleave circuit 8, it is separated into two code groups at a distribution circuit 9, the code group using the error correction code is corrected at an error correction circuit 10, and the information indicating the location of error is transmitted to a burst location judging circuit 12. The code group using the error detection code detects error at an error detection circuit 11, the circuit 12 judges the location and length of the burst and corrects the bit in error in the error detection code.