MULTILAYER OPTICAL DISC HAVING A RECORDING STACK TYPE INDICATOR

摘要

A MULTILAYER RECORD CARRIER OF A WRITABLE TYPE HAS A FIRST RECORDING LAYER (40) HAVING A FIRST RECORDING STACK (50, 51) OF FIRST TYPE AND A SECOND RECORDING LAYER (41) HAVING A SECOND RECORDING STACK (54, 55) OF A SECOND TYPE. THE FIRST AND SECOND RECORDING STACKS HAVE DIFFERENT WRITING PARAMETERS. EACH RECORDING LAYER HAS A PRE-FORMED RECORDING CONTROL PATTERN THAT IS READABLE VIA 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 IN DEPENDENCE OF THE RECORDING STACK TYPE INDICATOR RETRIEVED FROM THE RECORDING CONTROL PATTERN.