| 摘要 |
PURPOSE:To provide a video scrambling method prevented from the easy decoding of the scrambling method and the deterioration of reproduced picture quality by exchanging the order of lines in a block, and in a horizontal flyback time, adding data indicating the normal position of a corresponding line to obtain a video scrambling signal. CONSTITUTION:A scramble controller 309 applies line specification data 309(1) to an address decoder 308 to address said line memory. The address decoder 308 addresses a line memory 304 successively at a timing different from that of said storage and the output data of the line memory 304 are converted into analog signal by a D/A converter 305. The output 309(2) of the scramble controller 309 is data indicating the normal position of the line, scrambled by a data scrambler 310 and superposed to the horizontal flyback time of the corresponding line by a superposing circuit 306 and the superposed signal is outputted from an output terminal 312. |
