| 摘要 |
<p>Method for demodulating a sampling signal (HF) from a storage medium, which dispenses with the use of a PLL, and to a device for reading from and/or writing to storage media which uses such a method. Method for demodulating a sampling signal (HF) from a storage medium, the information in the sampling signal (HF) being coded in pulse lengths of an integer multiple of the period (T) of the modulation frequency, has the steps of : - determining (2) the current pulse length (pb1) and/or the current total length (pb2) of two successive pulses, - determining (3) the maximum pulse length (mpb1) which occurs in the sampling signal (HF) and/or the maximum total length (mpb2) of two successive pulses, and - comparing (4, 5) at least two of the values (pb1, pb2 , mpb1, mpb2) determined in order to determine the type of sampling signal or to establish a synchronization bit sequence.</p> |
