Patent ID: 7248697
Filing Date: 2007-07-24
Classification: G11B,H04L,H04N

Abstract:
1. An apparatus for scrambling and descrambling data in an optical disk system, the apparatus comprising: a shift register which is initialized at a predetermined initial value and which generates 16 bits of a scrambling word at a time using a predetermined parallel operation; and an XOR logic operator which performs an XOR logic operation on the scrambling word and every bit of scrambled data or descrambled data corresponding to the scrambling word; wherein the shift register performs an XOR logic operation on a seventh bit and a fifteenth bit, on a first bit, an eighth bit, and a twelfth bit, on a second bit, a ninth bit, and a thirteenth bit, on a third bit, a tenth bit, and a fourteenth bit, on a fourth bit, an eleventh bit, and a fifteenth bit, on the first bit and a fifth bit, on the second bit and a sixth bit, on a third bit and the seventh bit, on the fourth bit and the eighth bit, on the fifth bit and the ninth bit, on the sixth bit and the tenth bit, on the seventh bit and the eleventh bit, on the eighth bit and the twelfth bit, on the ninth bit and the thirteenth bit, and on the tenth bit and the fourteenth bit, and stores the results of the XOR logic operations in the first through fifteenth bits, respectively.