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AssigneeSony Corporation
InventorsYoichiro Sako, Shigeyuki Yoneyama
Estimating the term…
A signal reproducing apparatus for prohibiting copying or unauthorized use. The apparatus includes a copying management information decision circuit 19 for discriminating the state of the copying management information read out from each header of a data sector and within the TOC, a protect signal generating circuit 20 for generating a protect signal based on the discrimination signal and a mixing circuit 24 for mixing a protect signal in a vertical blanking period of an analog video signal D/A converted from digital video data reproduced from an optical disc D. The apparatus also includes a descrambling circuit 31 for descrambling the digital data based on the copying management information and a scrambling circuit 32 for descrambling the digital data. The apparatus enables prohibition of unauthorized analog copying and digital copying, inhibition of serial generational copying and prohibition of unauthorized analog and digital copying simultaneously.
A method for reproducing digital data from a signal record medium, comprising the steps of:
An apparatus for reproducing digital data from a signal recording medium, comprising:
A method for recording a signal, comprising the steps of:
A signal recording apparatus comprising:
A signal reproducing apparatus for reproducing a ciphered signal from a signal record medium comprising:
A method for receiving and reproducing transmitted digital data, comprising the steps of:
An apparatus for receiving and reproducing transmitted digital data, comprising:
A record medium comprising:
Dependencies are inferred from the claim text.