Adaptive synchronization marker for insertion/deletion/substitution error correction

This paper proposes an adaptive selection method of synchronization marker to improve the error correction capability of insertion/deletion/substitution error correcting code. The adaptive markers are inserted into every d bits of a codeword of LDPC code, where the marker value is determined depending on the neighboring bits of the codeword. This paper also shows a forward-backward algorithm to calculate the symbol-by-symbol likelihood. Evaluation shows that the bit error rate of the proposed method is lower than that of the conventional method using fixed synchronization marker.