Method with average run length codes maintained for reading parameters improved control, record carrier and apparatus

摘要

The present invention is directed to a method and apparatus for controlling the read at least one parameter of the magnetic domain expansion magneto-optical recording medium. And is generated based on the comparison of the monitoring results and the average run length of a predetermined average runlength of detecting a read signal is monitored, an error signal is set to the encoding process. In addition, reading one parameter is controlled based on the error signal generation at least. Furthermore, the present invention, the method to be applied to at least one of the quantities in the spatial domain, and the mark area in the storage layer, the run-length constraint, on a record carrier and apparatus. Runlength constraints are selected to maintain the cumulative run-length deviation from the average run length of the predetermined range of interest. Control technique and run-length characteristics of the present proposal provides the advantage that contributes to the error signal, and a much faster response, detection run length all, of reducing the read error.