Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2007-06-12
2007-06-12
Sheikh, Ayaz (Department: 2131)
Cryptography
Video cryptography
Copy protection or prevention
C380S203000, C386S349000, C386S349000, C386S349000, C386S349000, C360S050000, C713S189000, C713S151000, C713S153000, C713S165000, C726S026000, C726S031000, C726S032000, C726S033000
Reexamination Certificate
active
09796908
ABSTRACT:
Copyright of contents to be transmitted may be protected for an analog signal produced by converting a digital signal representative of the contents. A signal transmission apparatus determines whether the contents are protected by copyright by detecting copyright protection information of a digital image signal of the contents at a protection information detecting unit, and scrambles an analog image signal converted from the digital image signal to output when the copyright is protected, or prohibits outputting of the analog image signal. When a receiving apparatus receives a transmitted signal, the apparatus generates a digital image signal and the analog image signal based on the transmitted signal. When the authentication processing unit of the receiving apparatus has determined that the copyright has been protected through communication between an authentication processing unit of the transmission apparatus and that of the receiving apparatus, the unit scrambles the analog image signal to output, or prohibits outputting thereof, or superimposes a-copy-guard signal on the image signal to output.
REFERENCES:
patent: 5315448 (1994-05-01), Ryan
patent: 5349641 (1994-09-01), Coutrot et al.
patent: 5459583 (1995-10-01), Nakata
patent: 5627655 (1997-05-01), Okamoto et al.
patent: 5778064 (1998-07-01), Kori et al.
patent: 6243530 (2001-06-01), Kato
patent: 6404889 (2002-06-01), Ryan et al.
patent: 6473560 (2002-10-01), Linnartz et al.
patent: 6668324 (2003-12-01), Mangold et al.
patent: 6707774 (2004-03-01), Kuroda et al.
patent: 0 830 024 (1998-03-01), None
patent: 1146329 (1999-05-01), None
patent: 10-63599 (1998-03-01), None
patent: 10-124998 (1998-05-01), None
DDWG, Digital Visual Interface DVI, Apr. 2, 1999, Revision 1.0, pp. 46-47.
Kori Teruhiko
Ninoseki Noriko
Bell Boyd & Lloyd LLP
Chen Shin-Hon
Sheikh Ayaz
Sony Corporation
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