Dynamic magnetic information storage or retrieval – Checking record characteristics or modifying recording...
Patent
1996-10-25
1999-09-28
Faber, Alan
Dynamic magnetic information storage or retrieval
Checking record characteristics or modifying recording...
360 55, 360 31, G11B 502
Patent
active
059597941
ABSTRACT:
A method and apparatus is disclosed for determining the remanent noise in a magnetic medium by DC saturation of a region thereof and measurement of the remaining DC magnetization. Conventional recording transducers may be used to determine the remanent noise. Upon determination, the remanent noise may then be compensated for in either or both of the record and playback modes for all varieties of magnetic media including, videotapes, cassette tapes, etc.
REFERENCES:
patent: 2937241 (1960-05-01), Colbert
patent: 3535622 (1970-10-01), Cannon et al.
patent: 3755731 (1973-08-01), Young
patent: 4027250 (1977-05-01), Lang
patent: 4038692 (1977-07-01), Umeda et al.
patent: 4253184 (1981-02-01), Gitlin et al.
patent: 4258397 (1981-03-01), Kitamura et al.
patent: 4600890 (1986-07-01), Horvat
patent: 4806740 (1989-02-01), Gold et al.
patent: 4837426 (1989-06-01), Pease et al.
patent: 4847558 (1989-07-01), Fisher et al.
patent: 4985614 (1991-01-01), Pease et al.
patent: 5027113 (1991-06-01), Bennaval-Lamothe et al.
patent: 5093751 (1992-03-01), Yuki et al.
patent: 5177344 (1993-01-01), Pease
patent: 5365586 (1994-11-01), Indeck et al.
patent: 5416641 (1995-05-01), Minakawa
patent: 5587654 (1996-12-01), Indeck et al.
Noise Correlation of Magnetic Thin Film Media by Mian, Indeck, and Muller. Japanese Journal of Applied Physics, vol. 30, No. 8B, Aug., 1991, L1483-L1485.
Determination of a Track's Edge by Different Power Spectrum by Indeck, Mian, and Muller. Jpn. J. Appl. Phys., vol. 31 (1992), L1065-L1067.
Spatial Noise Phenomena of Longitudinal Magnetic Recording Media, by Hoinville, Indeck, and Muller. IEEE Transactions on Magnetics, vol. 28, No. 6 Nov. 1992, 3398-3406.
Measurements and Modelling of Noise in DC-Erased Thin-Film Media, by Vos, Tanaka, Judy. IEEE Transactions of Magnetics, vol. 26, No. 5, Sep. 1990, 2149-2151.
Spatial Structure of Media Noise in Film Disks, by Yarmchuk. IEEE Transactions on Magnetics, vol. Mag-22, No. 5, Sep. 1986, 877-882.
Noise From Unsaturated DC Erasure and Peak Shift Of Signals In Longitudinal Thin-Film Disk Media, by Ohara and Sato. IEEE Transactions on Magnetics, vol. Mag-23, No. 5, Sep. 1987, 2380-2382.
Novel Applications of Crytography in Digital Communications, by Omura. IEEE Communications Magazine, May 1990, 21-29.
A Physically Based Approach to Information Theory for Thin Film Magnetic Recording, by O'Sullivan, Porter, Indeck, and Muller. Proceedings of the Thirtieth Allerton Conference on Communication, Control and Computing, Oct. 1992.
Transverse Correlation Length in Thin Film Media, by Mian, Indeck, and Muller. IEEE Transactions on Magnetics, vol. 28, No. 5, Sep. 1992, 2733-2735.
A Magnetoresistive Gradiometer, by Indeck, Judy, and Iwasaki. IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, 2617-2619.
An Analysis of Multilayered Thin-Film Magnetic Field Gradiometers Having a Superconducting Spacer, by Indeck. Journal of The Magnetics Society of Japan, vol. 13, Supplement, No. S1 (1989), 599-604.
Interaction Factors of a Multi-Layered Magnetic Thin Film System, by Mian, and Indeck. IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, 2415-2417.
An interaction matrix for the energy analysis of an n-layered magnetic thin-film system, by Mian, Indeck. Journal of Magnetism and Magnetic Materials, 96 (1991) 248-260.
dc track edge interactions, by Indeck, Reising, Hoinville, Muller. Journal of Applied Physics, 69(8), Apr. 15, 1991, 4721-4723.
Track edge fluctuations, by Muller, Indeck, Murdock, and Ornes. Journal of Applied Physics, 67(9), May 1, 1990, 4683-4685.
In Situ Measurement of the Remanence Curve of Magnetic Recording Media, by Hoinville, Ornes, Murdock, and Muller. IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, 2976-2978.
An in situ measurement of intergranular coupling in magnetic film media, by Mian, Indeck, and Muller. Journal of Applied Physics, 73 (4), Feb. 15, 1993, 2027-2028.
Noise Characterization of Perpendicular Media, by Indeck, Johnson, Mian, Hoinville, and Muller. Journal of the Magnetics Society of Japan, vol. 15 Supplement, No. S2, (1991), 173-178.
Authenticating of Forensic Audio Recordings, by Koenig. Journal of the Audio Engineering Society, vol. 38, No. 1/2, 1990, 3-33.
Media Noise Reduction in Disk Memory Devices, IBM Technical Disclosure Bulletin, vol. 29, No. 11, Apr. 1987, New York, 4987-4988.
Intergranular exchange coupling, by Muller and Indeck. J. Appl. Phys., 75 (4), Feb. 15, 1994, 2289-2290.
Physically Based Information Science of Magnetic Recording--I. Information Capacity of a Medium Model, by O'Sullivan, Porter, Indeck and Muller. IEEE Transactions On Magnetics, vol. 29, No. 6, Nov. 1993, 4036-4038.
Recording medium properties and capacity bounds, by O'Sullivan, Porter, Indeck and Muller. J. Appl. Phys., 75 (10), May 15, 1994, 5753-5755.
Physically Based Information Science of Magnetic Recording--ii. Physical Sources of Medium Noise, by Porter, O'Sullivan, Indeck and Muller. IEEE Transactions On Magnetics, vol. 30, No. 6, Nov. 1994, 4266-4268.
Magnetic Recording System Design To Reduce Medium Noise Through Signal Precompensation, Agrawal; Master's Thesis, Aug., 1995.
Indeck Ronald Scott
Muller Marcel Wettstein
O'Sullivan Joseph Andrew
Faber Alan
Washington University
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