RECORD CARRIER OF THE OPTICAL TYPE AND A DEVICE FOR RECORDING AND/OR PLAYBACK FOR USE WITH SUCH A RECORD CARRIER

摘要

The invention relates to a record carrier of a disc-like optically inscribable type, having a preformed track in which an auxiliarily signal comprising a sequence of codes is recorded by means of a preformed track modulation. The codes comprise a sequence of address codes (AC) specifying the addresses of the track portions in which said address codes (AC) are recorded and special codes (SC). The special codes (SC) can be distinguished from said address codes (AC) and specify control data for controlling a recording by a recording device. The sequence can be obtained by replacing in a sequence of address codes (AC) with consecutive address values a plurality of said address by special codes (SC). The periodic pattern of address codes and special codes has a predetermined positional relationship with respect to a predetermined reference address. Such as for example a positional shift (n) with respect to the start of a Lead-in area (SLI). The presence and or amount of such a shift may be used to represent additional control information or indicate the presence of area on a disc provided with such additional control information.