Patent ID: 8488437

Claim:
An address detection method for a first recording medium and a second recording medium each including an area for recording a plurality of data, wherein: a recording position of the area on the recording medium is indicated by physical address information, data capacity of the first recording medium is less than or equal to 32 gigabytes per layer, and data capacity of the second recording medium is greater than or equal to 32 gigabytes per layer, the address detection method comprising steps of: detecting information to identify a type of a recording medium; based on the detected information, identifying whether the recording medium is the first recording medium or the second recording medium; when the identified recording medium is the second recording medium, detecting a part of the physical address information recorded in the second recording medium as physical wobble address information, wherein the part of the physical address information recorded in the second recording medium is less than all of the physical address information and the part of the physical address information is recorded in the second recording medium without changing values and regularity of bits; and restoring a part of the physical address information not recorded in the second recording medium based on continuity of least significant two bits forming a portion of the physical wobble address information recorded in the second recording medium.