Patent ID: 7200085
Filing Date: 2007-04-03
Classification: G11B

Abstract:
1. A recordable data storage medium, including an area on which property data, unique to the recordable data storage medium, was recorded and on which user data to be used by a user is written after having been encrypted with the property data, wherein the user data is written on the area in the same format as a first data format for a DVD read-only data storage medium, on which user data to be used by the user was written in the first data format and on which property data, unique to the read-only data storage medium, was recorded in a second data format, wherein at least portion of the property data was recorded on the recordable data storage medium in a third data format that is different from the second data format, and wherein the third data format uses a different modulation method from that of the second data format and satisfies an inverted polarity relationship with respect to the modulation method of the second data format.