DESCRAMBLING DATA GENERATING METHOD AND DEVICE OF A CD-ROM DECODER AND DESCRAMBLER THEREBY

摘要

Disclosed are a method for generating descrambling data of a CD-ROM decoder, a device thereof, and a descrambler using the same. The generation method assumes that DSCR ₀ [x] is the xth bit of the current 32-bit descrambling data, DSCR- ₁ [x] is the xth bit of the immediately preceding 32-bit descrambling data, and denotes an exclusive logical operation. when doing,;Where 1≤x≤15;Generating lower 1 to 15 bits of the descrambling data according to Equation (1); And;Where 16≤x≤32;It characterized in that it comprises the step of generating the upper 16 ~ 32 bits of the descrambling data by the formula (2).