JPS54130112A - High packing density digital magnetic data memory - Google Patents
High packing density digital magnetic data memoryInfo
- Publication number
- JPS54130112A JPS54130112A JP3217279A JP3217279A JPS54130112A JP S54130112 A JPS54130112 A JP S54130112A JP 3217279 A JP3217279 A JP 3217279A JP 3217279 A JP3217279 A JP 3217279A JP S54130112 A JPS54130112 A JP S54130112A
- Authority
- JP
- Japan
- Prior art keywords
- data memory
- packing density
- magnetic data
- high packing
- digital magnetic
- 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
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
- G11B20/10—Digital recording or reproducing
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1488—Digital recording or reproducing using self-clocking codes characterised by the use of three levels
- G11B20/1492—Digital recording or reproducing using self-clocking codes characterised by the use of three levels two levels are symmetric, in respect of the sign to the third level which is "zero"
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Digital Magnetic Recording (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/888,130 US4195318A (en) | 1978-03-20 | 1978-03-20 | High density bias linearized magnetic recording system utilizing Nyquist bandwidth partial response transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54130112A true JPS54130112A (en) | 1979-10-09 |
Family
ID=25392587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3217279A Pending JPS54130112A (en) | 1978-03-20 | 1979-03-19 | High packing density digital magnetic data memory |
Country Status (7)
Country | Link |
---|---|
US (1) | US4195318A (ja) |
JP (1) | JPS54130112A (ja) |
CA (1) | CA1134943A (ja) |
DE (1) | DE2910398A1 (ja) |
FR (1) | FR2420807A1 (ja) |
GB (1) | GB2017989A (ja) |
IT (1) | IT1112349B (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5834002B2 (ja) * | 1979-10-17 | 1983-07-23 | 日立電子株式会社 | デイジタル信号の磁気記録再生方式 |
US4504872A (en) * | 1983-02-08 | 1985-03-12 | Ampex Corporation | Digital maximum likelihood detector for class IV partial response |
US4586091A (en) * | 1984-05-03 | 1986-04-29 | Kalhas Oracle, Inc. | System and method for high density data recording |
KR940018849A (ko) * | 1993-01-28 | 1994-08-19 | 프레데릭 얀 스미트 | 영상신호 및 이에 대응하는 음성 신호를 길이방향 자기 기록 매체상의 경사기록 트랙에 기록하는 장치 및 기록매체 (Arrangement for recording a video signal and a corresponding audio signal in slant tracks on a longitudinal magnetic record carrier, and record carrier obtained by means of the arrangement) |
US5606464A (en) * | 1995-01-31 | 1997-02-25 | Lucent Technologies Inc. | Cancellation of precursor intersymbol interference in magnetic recording channels |
US7739577B2 (en) * | 2004-06-03 | 2010-06-15 | Inphase Technologies | Data protection system |
US7856464B2 (en) * | 2006-02-16 | 2010-12-21 | Sigmatel, Inc. | Decimation filter |
US8477856B2 (en) * | 2009-03-31 | 2013-07-02 | Analog Devices, Inc. | Multi-bit digital signal isolator |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3388330A (en) * | 1965-03-19 | 1968-06-11 | Bell Telephone Labor Inc | Partial response multilevel data system |
US3492578A (en) * | 1967-05-19 | 1970-01-27 | Bell Telephone Labor Inc | Multilevel partial-response data transmission |
US3573622A (en) * | 1968-04-23 | 1971-04-06 | Bell Telephone Labor Inc | Partial-response signal sampling for half-speed data transmission |
US3601702A (en) * | 1969-03-17 | 1971-08-24 | Gte Automatic Electric Lab Inc | High speed data transmission system utilizing nonbinary correlative techniques |
US3665485A (en) * | 1969-06-11 | 1972-05-23 | Petter Instr Co Inc | Method and system for high density recording of information on premagnetized magnetic tape |
US3679977A (en) * | 1969-06-24 | 1972-07-25 | Bell Telephone Labor Inc | Precoded ternary data transmission |
US3736414A (en) * | 1971-06-30 | 1973-05-29 | Ibm | Transversal filter equalizer for partial response channels |
US3840891A (en) * | 1972-12-27 | 1974-10-08 | Ibm | Time duration modulation and demodulation for storage or transmission of digital data |
JPS5325729B2 (ja) * | 1973-09-27 | 1978-07-28 | ||
US3855616A (en) * | 1973-10-01 | 1974-12-17 | Ibm | Phase shift reducing digital signal recording having no d.c. component |
US3921210A (en) * | 1974-01-14 | 1975-11-18 | Gen Dynamics Corp | High density data processing system |
US3952329A (en) * | 1975-02-06 | 1976-04-20 | International Business Machines Corporation | Pulse compression recording |
-
1978
- 1978-03-20 US US05/888,130 patent/US4195318A/en not_active Expired - Lifetime
-
1979
- 1979-01-30 CA CA000320485A patent/CA1134943A/en not_active Expired
- 1979-03-16 DE DE19792910398 patent/DE2910398A1/de not_active Withdrawn
- 1979-03-19 GB GB7909526A patent/GB2017989A/en not_active Withdrawn
- 1979-03-19 FR FR7906834A patent/FR2420807A1/fr active Pending
- 1979-03-19 JP JP3217279A patent/JPS54130112A/ja active Pending
- 1979-03-19 IT IT21126/79A patent/IT1112349B/it active
Also Published As
Publication number | Publication date |
---|---|
DE2910398A1 (de) | 1979-09-27 |
CA1134943A (en) | 1982-11-02 |
IT1112349B (it) | 1986-01-13 |
GB2017989A (en) | 1979-10-10 |
US4195318A (en) | 1980-03-25 |
IT7921126A0 (it) | 1979-03-19 |
FR2420807A1 (fr) | 1979-10-19 |
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