| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that data are possibly stolen and used by a computer when digital transmission is performed and possibly casually copied when analog transmission is carried out. SOLUTION: On a magnetic tape 1, output control information is recorded together with an MPEG stream. This output control information consists of two bits and is extracted by an output control circuit 9 from a reproduced signal to control a D.I/F circuit 7 and a switch circuit 11. Namely, the output control circuit 9 enables the D.I/F circuit 7 when the 1st bit of the output control information is '0' to output a digital signal and inhibits it when '1' from outputting the digital signal, a switch circuit 11 is turned off to inhibit an analog component signal from being outputted when the 2nd bit of the output control information is '0' and made to output the analog component signal when '1'. |
