Patent ID: 7661145

Claim:
A method of copy protecting an application, where the application is provided by an application file which is to be carried on an optical disc, the application incorporating information and control data, the method comprising: incorporating into the application file DSV data patterns which have been identified as capable of causing DSV problems when encoded onto an optical disc and wherein the DSV patterns are chosen to ensure that the DSV has a significant absolute value or the DSV data patterns are repeated patterns of values; wherein the DSV data patterns are incorporated immediately following at least two headers in the control data in the application file to ensure the DSV data patterns are accessed by a player or reader of the optical disc during use of the application file and wherein for each header information about the size of the header in the control data is modified to include information on the size of at least one of the DSV data patterns and at least one pointer or offset in the control data which points to the location of the DSV data patterns in the application file to ensure that the DSV data patterns are read.