Protection from unauthorized use of a recorded digital signal

Details Protection from unauthorized use of a recorded digital signal Protection from unauthorized use of a recorded digital signal

G - Physics

11

B

352/19, 340/70,

G11B 20/00 (2006.01) G11B 20/10 (2006.01) G11B 27/036 (2006.01) G11B 27/30 (2006.01) G06F 1/00 (2006.01)

Patent

CA 1329654

ABSTRACT A digital signal recording and reproducing apparatus for recording an input digital signal on a recording medium to reproduce it therefrom, comprising first means for recording the same identification code as an identification number particular to the digital signal recording and reproducing apparatus when the input digital signal has a specified sampling frequency at the time of recording, and second means for reproducing the recorded identification code at the time of reproduction, thus permitting the digital signal recorded on the recording medium to be reproduced only when the reproduced identification code is coincident with the identification number particular to the apparatus.

563639

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