MULTILAYER OPTICAL DISC HAVING RECORDING STACK TYPE INDICATOR

摘要

FIELD: information technology. ^ SUBSTANCE: record carrier has a first recording layer having a first recording stack of a first type and a second recording layer having a second recording stack of a second type. The first and second recording stacks have different writing parameters. Each recording layer has a pre-formed recording control pattern which is readable using a laser beam for indicating the track. At least one recording control pattern comprises a recording stack type indicator for indicating the writing parameters of the second recording stack. A recording device has a control unit (20) for adjusting recording parameters in the device depending on the recording stack type indicator retrieved from the recording control pattern. ^ EFFECT: improved disc. ^ 8 cl, 7 dwg