| 摘要 |
PURPOSE: To obtain a device which scrambles and descrambles video signals. CONSTITUTION: A scrambler which scrambles composite video signals incorporates an A/D converter 10 which converts composite video signals into many digital video data samples and a scrambling data generator 30 which generates scrambling data of the number corresponding to the digital video data samples. An adder 12 generates scrambled data by adding each scrambling data to each digital video data sample. A descrambler restores the composite video signals by eliminating the scrambling data from the scrambled video signals. |
