SCRAMBLE CANCEL DEVICE FOR SECURITY ELEMENT AND SECURITY ELEMENT CONSISTING OF THE CANCEL DEVICE

摘要

PROBLEM TO BE SOLVED: To decrease the dissipated electric power by producing a combination of data synchronously with a clock signal, consisting of a specific frequency and then dividing the combination of data that canceled the scramble into sub-combinations, synchronized with another clock signal having the same frequency. ;SOLUTION: A signal VE, produced from the video data which should cancel the scramble and a clock signal CLK, synchronized with the frequency set, when the bits are accumulated in a deserializer 3 are supplied to the deserializer 3. The groups of (n) bits collected at the deserializer 3 form a combination C3 of (n) pieces of parallel bits, and a clock signal CL1 having the frequency, i.e., a fraction of the frequency of the signal CLK shifts the combination C3 between the stages of a memory 4. Then combination of data which canceled the scramble, that is generated from a scramble cancel circuit 5, is divided into sub-combinations synchronized with a clock signal CL2 having the same frequency as the signal CL1.;COPYRIGHT: (C)1998,JPO