Yoshikazu Tsuchiya

Statistical analysis of error correcting schemes of stationary head digital audio recorders

In spite of the great advance in performance, digital audio recorders have some critical points in handling and reliability resulted from the code errors These code errors are caused by (1) drop outs of tapes, by (2) peak, shift, jitter or noise, and by (3) finger prints, injuring tape edge, or dusts. (1) and (3) will cause rather burst errors and (2) will cause random errors. But, in effect, the burst and random errors cannot be separated discretely, and the trend is described by one parameter “bit error correlation coefficient.” In this paper, the changes of parameters of a statistical model of errors of magnetic tapes are discussed due to the increase of packing density. That is not only the increase of error rate but also the decrease of bit error correlation coefficient. Various error correcting schemes are evaluated by means of computer simulation for various values of error rate and bit error correlation coefficient. Another important point to increase the reliability of the systems is error interp...