| 摘要 |
PROBLEM TO BE SOLVED: To accurately and appropriately control the duplication of information by transmitting a duplication prevention control signal prior to transmission of an information signal, making arrangements for duplication prevention control based on the received duplication prevention control signal and executing the duplication prevention control when the information signal is received. SOLUTION: A system controller 19 judges that a disk is loaded, and operates a read-out part 12, a duplication prevention control signal extraction part 15, an SS duplication prevention control signal generation part 16 and a D/A conversion circuit 192. The duplication prevention control signal S5 is extracted from a digital regenerative signal component S2 extracted by the read-out part 12 in the duplication prevention control signal extraction part 15, supplied to the SS duplication prevention control signal generation part 16 and spectrum-spread to generate the signal S6. In the constitution, by extracting the duplication prevention control signal added to a video signal component, the duplication can accurately and appropriately controlled. |
