JPS6414769A - Copyright information adding device - Google Patents
Copyright information adding deviceInfo
- Publication number
- JPS6414769A JPS6414769A JP17024887A JP17024887A JPS6414769A JP S6414769 A JPS6414769 A JP S6414769A JP 17024887 A JP17024887 A JP 17024887A JP 17024887 A JP17024887 A JP 17024887A JP S6414769 A JPS6414769 A JP S6414769A
- Authority
- JP
- Japan
- Prior art keywords
- information
- signal
- copyright information
- false
- music information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
PURPOSE:To prevent the generation of a lack of a signal having specific frequency in music information and a change of a phase by adding a false irregular noise to obtain copyright information. CONSTITUTION:The titled device is provided with an information adding means 3 for adding a false irregular noise to music information when a copyright owner records the music information in a recording medium. Namely, when the music information to which copyright information is added is inputted, the copyright information is added by an adder 304 and outputted. The copyright information is the false irregular noise and is formed by applying a clock from a clock signal generator 302 to an M-sequence generator 301 and converting an output signal from the generator 301 into an analog signal by a D/A converter 303. Consequently, a signal with the specific frequency is not lacked and a large change of a phase is not generated.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17024887A JPS6414769A (en) | 1987-07-08 | 1987-07-08 | Copyright information adding device |
EP88306101A EP0298691B1 (en) | 1987-07-08 | 1988-07-05 | Method and apparatus for protection of signal copy |
DE3851724T DE3851724T2 (en) | 1987-07-08 | 1988-07-05 | Method and device for protecting copy signals. |
US07/216,495 US4979210A (en) | 1987-07-08 | 1988-07-08 | Method and apparatus for protection of signal copy |
US07/544,276 US5073925A (en) | 1987-07-08 | 1990-06-13 | Method and apparatus for the protection of signal copy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17024887A JPS6414769A (en) | 1987-07-08 | 1987-07-08 | Copyright information adding device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6414769A true JPS6414769A (en) | 1989-01-18 |
Family
ID=15901419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17024887A Pending JPS6414769A (en) | 1987-07-08 | 1987-07-08 | Copyright information adding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6414769A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06129411A (en) * | 1992-10-14 | 1994-05-10 | Kito Corp | Coupling device |
-
1987
- 1987-07-08 JP JP17024887A patent/JPS6414769A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06129411A (en) * | 1992-10-14 | 1994-05-10 | Kito Corp | Coupling device |
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