COPYRIGHT PROTECTION INFORMATION PROTECTING METHOD, INFORMATION SIGNAL PROCESSING METHOD, INFORMATION SIGNAL REPRODUCING METHOD, INFORMATION SIGNAL RECORDING METHOD, AND INFORMATION SIGNAL PROCESSING DEVICE, INFORMATION SIGNAL REPRODUCING DEVICE, AND INFORMATION SIGNAL RECORDING DEVICE
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United States of America Patent
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Oct 5, 2004
Grant Date -
N/A
app pub date -
Jul 31, 2000
filing date -
Jul 30, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
At the time of performing signal processing of information signals to which copyright protection information has been added, signal processing which would make detection of copyright protection information difficult or impossible is restricted, based on the copyright protection information detected from the information signals. Thus, even in the event that the information signals pass through a device having a signal processing unit which would make detection of copyright protection information difficult or impossible, copyright protection can be performed in a sure and inexpensive manner.
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