IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0328241
(1999-06-08)
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우선권정보 |
JP-10-160979(1998-06-09) |
발명자
/ 주소 |
- Ogino,Akira
- Kimura,Yuji
- Ezaki,Tadashi
- Kori,Teruhiko
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출원인 / 주소 |
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대리인 / 주소 |
Finnegan, Hendersonl Farabow, Garrett &
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인용정보 |
피인용 횟수 :
5 인용 특허 :
7 |
초록
▼
An information signal reproducing apparatus for reproducing an information signal from a recording medium on which the information signal, including added copy control information is recorded, comprising a first detector for detecting whether the information signal read out from said recording mediu
An information signal reproducing apparatus for reproducing an information signal from a recording medium on which the information signal, including added copy control information is recorded, comprising a first detector for detecting whether the information signal read out from said recording medium is encrypted or not-encrypted and for producing an output representative thereof; a second detector for detecting said copy control information from the information signal read out from the recording medium and for producing an output representative thereof; and a controller for selectively restricting reproduction of the information signal based on the outposts of the first detector and the second detector.
대표청구항
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What is claimed is: 1. An information signal outputting method for receiving a supplied information signal copy control information added thereto, and outputting said information signal, comprising: detecting whether said information signal is encrypted or not-encrypted by a plurality of the encryp
What is claimed is: 1. An information signal outputting method for receiving a supplied information signal copy control information added thereto, and outputting said information signal, comprising: detecting whether said information signal is encrypted or not-encrypted by a plurality of the encryption key data and producing an output representative thereof; detecting said copy control information from said information signal and producing an output representative thereof, said copy control information comprising electronic watermark information embedded in said information signal; restricting output of said information signal when a combination of the outputs of said detection of whether said signal is encrypted or not-encrypted and the detection of said copy control information results in a combination that should not occur in normal use; and notifying a user that the information signal has been illegally copied when said control means restricts reproduction, modifying access to said information signal to allow reproduction of said information signal while simultaneously displaying an informative message to the user or to allow reproduction of said information signal while blanking a part of the reproduced signal. 2. The information signal outputting method according to claim 1, wherein said information signal has a plurality of different kinds of copy control information added thereto, and reproduction of said information signal is selectively restricted based on whether said signal is encrypted or not-encrypted and the states of said plurality of different kinds of copy control information. 3. An information signal outputting apparatus for receiving a supplied information signal having copy control information added thereto, and outputting said information signal, comprising: first detecting means for detecting whether said information signal is encrypted or not-encrypted by a plurality of the encryption key data and producing an output representative thereof; second detecting means for detecting said copy control information from said information signal and producing an output representative thereof, said copy control information comprising electronic watermark information embedded in said information signal, said second detecting means detecting said electronic watermark information; control means for restricting output of said information signal when a combination of the output of said first detecting means and the output of said second detecting means results in a combination that should not occur in normal use; and notifying means for notifying a user that the information signal has been illegally copied when said control means restricts reproduction, means for modifying access to said information signal to allow reproduction of said information signal while simultaneously displaying an informative message to the user or to allow reproduction of said information signal while blanking a part of the reproduced signal. 4. The information signal outputting apparatus according to claim 3, wherein said information signal has a plurality of different kinds of copy control information added thereto, said information signal outputting apparatus including a plurality of second detecting means for detecting each of said corresponding plural different kinds of copy control information, each producing an output representative thereof; and said control means selectively restricting output of said information signal based on the outputs of said first detecting means and said plurality of second detecting means. 5. An information signal reproducing method for reproducing an information signal from a recording medium on which said information signal, including added copy control information is recorded, comprising: detecting whether said information signal read out from said recording medium is encrypted or not-encrypted by a plurality of the encryption key data from said recording medium and producing an output representative thereof; detecting said copy control information from said information signal read out from said recording medium and producing an output representative thereof, said copy control information comprising electronic watermark information embedded in said information signal; restricting reproduction of said information signal when a combination of the outputs of said detection of whether said information signal is encrypted or not encrypted and said detection of said copy control information results in a combination that should not occur in normal use; and notifying a user that the information signal has been illegally copied when said control means restricts reproduction, modifying access to said information signal to allow reproduction of said information signal while simultaneously displaying an informative message to the user or to allow reproduction of said information signal while blanking a part of the reproduced signal. 6. The information signal reproducing method of claim 5, wherein copy control information in accordance with the copy generation management system (CGMS) is added to said information signal as said copy control information; and said copy control information is detected in accordance with the copy generation management system (CGMS). 7. The information signal reproducing method of claim 5, wherein said electronic watermark information has been subject to spectrum spreading. 8. The information signal reproducing method of claim 5, wherein said electronic watermark information represents one of four states, all copies are prohibited, only one copy is allowed, no more copies are allowed, or copies are allowed freely. 9. The information signal reproducing method of claim 5, wherein said information signal is encrypted in accordance with the contents scramble system (CSS), and whether said information signal is encrypted is detected in accordance with the contents scramble system (CSS). 10. The information signal reproducing method of claim 5, wherein a plurality of different kinds of copy control information are added to said information signal, and reproduction of said information signal is selectively restricted based on whether said information signal is encrypted, and the states of said plurality of different kinds of copy control information. 11. The information signal reproducing method of claim 10, wherein said information signal is encrypted in accordance with the contents scramble system (CSS), and said plurality of different kinds of copy control information includes generation management system (CGMS), and electronic watermark information. 12. The information signal reproducing method of claim 11, wherein said electronic watermark information has been subjected to spectrum spreading. 13. The information signal reproducing method of claim 5, wherein when it is detected that said information signal is encrypted, and when it is detected that said copy control information indicates that no copies are permitted, reproduction of said information signal is permitted. 14. An information signal reproducing apparatus for reproducing an information signal from a recording medium on which said information signal, including added copy control information is recorded, comprising: first detecting means for detecting whether said information signal read out from said recording medium is encrypted or not-encrypted by a plurality of the encryption key data from said recording medium and producing an output representative thereof; second detecting means for detecting said copy control information from said information signal read out from said recording medium and producing an output representative thereof, said copy control information comprising electronic watermark information embedded in said information signal, said second detecting means detecting said electronic watermark information; control means for restricting reproduction of said information signal when a combination of the output of said first detecting means and the output of said second detecting means results in a combination that should not occur in normal use; and notifying means for notifying a user that the information signal has been illegally copied when said control means restricts reproduction, modifying means for modifying access to said information signal to allow reproduction of said information signal while simultaneously displaying an informative message to the user or to allow reproduction of said information signal while blanking a part of the reproduced signal. 15. The information signal reproducing apparatus of claim 1, wherein said copy control information added to said information signal comprises copy control information in accordance with the copy generation management system (CGMS), said second detecting means detects said copy control information in accordance with the copy generation management system (CGMS). 16. The information signal reproducing apparatus of claim 1, wherein said electronic watermark information has been subject to spectrum spreading. 17. The information signal reproducing apparatus of claim 1, wherein said electronic watermark information represents one of four states, all copies are prohibited, only one copy is allowed, no more copies are allowed, or copies are allowed freely. 18. The information signal reproducing apparatus of claim 1, wherein when said information signal is encrypted, it is encrypted in accordance with the contents scramble system (CSS); and said first detecting means detects whether said information signal is encrypted in accordance with the contents scramble system (CSS). 19. The information signal reproducing apparatus of claim 1, wherein a plurality of different kinds of copy control information are added to said information signal, said information signal reproducing apparatus further comprising: a plurality of second detecting means for detecting each of said corresponding plurality of different kinds of copy control information, each producing an output representative thereof; and wherein said control means selectively restricts reproduction of said information signal based on the detection output of said first detecting means and the respective detection outputs of said plurality of second detecting means. 20. The information signal reproducing apparatus of claim 19, wherein said information signal is encrypted in accordance with the contents scramble system (CSS), and said plurality of different kinds of copy control information include copy control information in accordance with the copy generation management system (CGMS) and electronic watermark information. 21. The information signal reproducing apparatus of claim 20, wherein said electronic watermark information has been subjected to spectrum spreading. 22. The information signal reproducing apparatus of claim 1, wherein when said first detecting means detects that said information signal is encrypted, and said second detecting means detects that said copy control information indicates that no copies are allowed, said control means permits reproduction of said information signal.
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