Patent ID: 7908488
Filing Date: 2011-03-15
Classification: G11B

Abstract:
1. A recording medium, comprising: first area for storing control information required basically for recording or reproducing user data; and second area for storing copy protection information for use in generating or processing copy protected user data, the copy protected user data being encrypted user data and the copy protection information being required to encrypt/decrypt the user data, wherein the control information in the first area and the copy protection information in the second area are recorded separately, a plurality of copy protection information are presented in specific data units in the recording medium, data structure of the copy protection information in a first specific data unit is different from data structure of the copy protection information in a second specific data unit with respect to a modulation method, and at least one of the copy protection information in the first specific data unit and the copy protection information in the second specific data unit is formed as a wobbled pattern.