Application of new variable-length block code and Viterbi decoding using d-constraint to magneto-optical recording.
Hisashi Osawa, Kenji Yamauchi, Saburo Tazaki · The Journal of The Institute of Image Information and Television Engineers · 1990
Aastract: A (3, 19 ; 4, 9 ; 3) code, one of the variable-length block codes, is developed.This code introduces less intersymbol interference into magneto-optical recording than a conventional (2, 7 ; 1, 2 ; 4) code.A PR (1, 1) system, used for signal detection, and Viterbi decoding using the d-constraint of these codes as a decoding method, are proposed.Their error probabilities are obtained by computer simulation.Their performance is compared with the conventional peak detection method.The results show the proposed method exhibits excellent performance compared with the conventional one, and a large improvement in performance is achieved by using a (3, 19 ; 4, 9 ; 3) code.1.