| 摘要 |
<p>The invention relates to systems for reproducing signals from a moving carrier of the type comprising a pre-etched track (21). A second track (22) parallel to this pre-etched track (21) receives the service data and the active data. According to the invention, the servocontrol of the recording/reading head is performed on one or other of these tracks depending on the detecting of a presence or of an absence of data signal on this second track. Application to the recording/reading of an optical disk. <IMAGE></p> |
