JPS6353605B2 - - Google Patents
Info
- Publication number
- JPS6353605B2 JPS6353605B2 JP18454380A JP18454380A JPS6353605B2 JP S6353605 B2 JPS6353605 B2 JP S6353605B2 JP 18454380 A JP18454380 A JP 18454380A JP 18454380 A JP18454380 A JP 18454380A JP S6353605 B2 JPS6353605 B2 JP S6353605B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording
- data
- transfer
- sine wave
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 26
- 230000005415 magnetization Effects 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- -1 Salt vinyl acetate Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 2
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229940090961 chromium dioxide Drugs 0.000 description 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
- G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18454380A JPS57109113A (en) | 1980-12-25 | 1980-12-25 | Data recording method to magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18454380A JPS57109113A (en) | 1980-12-25 | 1980-12-25 | Data recording method to magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57109113A JPS57109113A (en) | 1982-07-07 |
| JPS6353605B2 true JPS6353605B2 (de) | 1988-10-25 |
Family
ID=16155039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18454380A Granted JPS57109113A (en) | 1980-12-25 | 1980-12-25 | Data recording method to magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57109113A (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0261511U (de) * | 1989-10-20 | 1990-05-08 | ||
| WO1991001547A1 (en) * | 1989-07-14 | 1991-02-07 | Nihon Card Center Kabushiki Kaisha | Reader/writer for magnetic cards |
-
1980
- 1980-12-25 JP JP18454380A patent/JPS57109113A/ja active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991001547A1 (en) * | 1989-07-14 | 1991-02-07 | Nihon Card Center Kabushiki Kaisha | Reader/writer for magnetic cards |
| JPH0261511U (de) * | 1989-10-20 | 1990-05-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57109113A (en) | 1982-07-07 |
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