| 摘要 |
<P>PROBLEM TO BE SOLVED: To highly accurately detect a second synchronization point without being affected by the state of electric field strength or the noise of signals. <P>SOLUTION: A signal synthesis circuit 12 acquires a unit time length of input waveform data in which each sample point has a value expressed by a plurality of bits from signals including time codes outputted from a reception circuit 10 and accumulates the input waveform data. A CPU 13 finds both the position of the minimum value, the position indicating the minimum value on a time base in accumulated input waveform data, and the position of the maximum gradient, the position having a maximum difference between values of adjacent sample points on a time base in the accumulated input waveform data, and computes the head position of the signals including the time codes on a unit time on the basis of the position of the minimum value and the position of the maximum gradient. <P>COPYRIGHT: (C)2010,JPO&INPIT |
