Digital signal recording method, digital signal reproducing method, digital signal recording and reproducing method, and digital signal recording and reproducing apparatus

A digital signal recording and reproducing method and apparatus using first, second, third, and fourth information as information to protect a copyright, the first and second information are added to the digital signal, the third information is inputted from the digital interface together with the d...

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Bibliographic Details
Main Authors AIKAWA MAKOTO, SASAMOTO MANABU, OKAMOTO HIROO, OWASHI HITOAKI
Format Patent
LanguageEnglish
Published 06.02.2007
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:A digital signal recording and reproducing method and apparatus using first, second, third, and fourth information as information to protect a copyright, the first and second information are added to the digital signal, the third information is inputted from the digital interface together with the digital signal, a value of the fourth information is decided from a combination of the first to third information, and the fourth information is recorded onto the recording medium. The first information is information to control a copy restriction of the digital signal, the second information is information to perform a control about whether the signal is protected against the illegal use or not, the third information is information to indicate whether the signal has been encrypted or not, and the fourth information is information to control the copy restriction of the digital signal recorded on the recording medium.
Bibliography:Application Number: US20010982174