Seismic data enhancement method and apparatus
What is claimed is: 1. A method of enhancing the signal to noise ratio of seismic data comprising the steps of obtaining from at least one array of seismic detectors, an analog signal representative o... Read More
Inventors: Currie, William S.; DeBaun, David R.;, Assignee: Texaco Inc. (White Plains, NY) |
Information recording and reproducing device providing faster access time to a recording medium
An object of the present invention is to provide an information recording and reproducing device which can ensure recording and reproducing operations promptly on and from a recording medium and can e... Read More
Inventors: Maeda, Shigemi; Kojima, Kunio; Akiyama, Jun; Terashima, Shigeo; Numata, Tomiyuki;, Assignee: Sharp Kabushiki Kaisha (Osaka, JP) |
Magnetooptical recording medium having improved sensitivity
The present invention has been made in view of the foregoing problems in the prior art and it is therefore an object of the present invention to provide a magneto-optical recording medium capable of e... Read More
Inventors: Kagami, Nobutake; Doi, Yuichiro; Nakamura, Yuko;, Assignee: Sony Corporation (Tokyo, JP) |
Location identification in a communications signalling network
I claim: 1. Apparatus intended for connection to a telecommunications signalling network, said network having a plurality of signalling points interconnected by signalling links, the network carrying ... Read More
Inventors: Ferguson, Toby H.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Data recording format and method and apparatus for producing same
In accordance with the present invention a sector of data composed of a plurality of data bits in binary or other form is converted into a group of data segments wherein each data segment is of unifor... Read More
Inventors: Bode, Elwood J.;, Assignee: BTI Computer Systems (Sunnyvale, CA) |
Color identification system
I claim: 1. An identification system comprising an identifying member and an authenticating device, said identifying member having thereon characters in at least two different colors with areas of sai... Read More
Inventors: Tasma, Gerald W.;, Assignee: |
Releasable fast-action pipe coupling
We claim: 1. A releasable fast-action coupling comprising: a female part formed with an outwardly open bore centered on an axis and having a smooth-walled inner portion, and an outer portion formed wi... Read More
Inventors: Gnauert, Werner; Hochstein, Detlef;, Assignee: Friedrich Grohe Aktiengesellschaft (Hemer, DE) |
Apparatus for generating magnetic field varying in response to an information signal
Accordingly, it is an object of the present invention to provide an apparatus for generating a magnetic field varying in response to an information signal and being caused to act on a recording medium... Read More
Inventors: Eto, Hiroshi; Oka, Nobuyuki; Nagaki, Takehiro;, Assignee: Sony Corporation (Tokyo, JP) |
Reading system for a control track of an optical disk
This invention has been made in view of the above, and its object is to provide an optical disk reading system which can stably conduct reading operation of the control track even without using a high... Read More
Inventors: Haneji, Yasuo;, Assignee: Victor Company of Japan, Ltd. (Yokohama, JP) |
Character and picture information reading apparatus
An object of the present invention is to automatically set a reading range, and to perform both detection of the reading range and image reading processing with one scan. If it is so designed that an ... Read More
Inventors: Fuwa, Jyoichi;, Assignee: Ricoh Company, Ltd. (Kyo, JP) |
Image signal processing method
The primary object of the present invention is to provide an image signal processing method wherein, even though a burst error arises, the error is rendered imperceptible in a reproduced image. Anothe... Read More
Inventors: Shimura, Kazuo;, Assignee: Fuji Photo Film Co., Ltd. (Kanagawa, JP) |
Equalizer adjustment for partial-response maximum-likelihood disk drive systems
OF THE PREFERRED EMBODIMENTS In FIG. 1 there is shown a partly schematic block diagram of parts of a data storage disk file 10 including a data storage medium generally designated as 12 and a control... Read More
Inventors: Coker, Jonathan D.; Galbraith, Richard L.; Walker, Gary W.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Method and apparatus for measuring error rate of magnetic recording devices having a partial response maximum likelihood data detection channel
OF THE INVENTION Block Diagram of the System--FIG. 3 As has been mentioned above, a PRML channel is a part of a disk drive unit which is used for data detection. It has also been mentioned that the c... Read More
Inventors: Taratorin, Alex;, Assignee: Guzik Technical Enterprises, Inc. (San Jose, CA) |
Adaptation and training of digital finite impulse response filter within PRML sampling data detection channel
A general object of the present invention is to provide methods for rapidly adapting data channel response within a PR4,ML disk drive data channel in a drive architecture including embedded servo sect... Read More
Inventors: Abbott, William L.; Nguyen, Hung C.;, Assignee: Quantum Corporation (Milpitas, CA) |
Magnetic recording and reproducing apparatus, reproduction signal processing apparatus, and reproduction signal processing method
According to the first aspect of the present invention, there is provided a reproduction signal processing apparatus comprising: a memory circuit storing a predetermined pattern for deciding equalizin... Read More
Inventors: Sato, Naoki; Ouchi, Yasuhide; Kojima, Hirotsugu; Sawaguchi, Hideki; Hori, Yosuke;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Self-equalization method for partial-response maximum-likelihood disk drive systems
OF THE PREFERRED EMBODIMENT In FIG. 1 there is shown a partly schematic block diagram of parts of a data storage disk file 10 including a data storage medium generally designated as 12 and a control ... Read More
Inventors: Coker, Jonathan D.; Galbraith, Richard L.; Hirt, Walter; Stanek, David J.; Warne, Mark D.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Write precompensation optimization in a PRML channel using a selected PRML signal level
A general object of the present invention is to provide a write precompensation optimization circuit and related method that overcomes the drawbacks and disadvantages of the prior art by determining a... Read More
Inventors: Ziperovich, Pablo A.; Che, Xiaodong;, Assignee: Quantum Corporation (Milpitas, CA) |
Channel quality
For an understanding of the features of the invention, reference is made to the drawing. In the various figures of the drawing, like reference numerals have been used to identify similar elements. As... Read More
Inventors: Foland, Jr., William R.; Behrens, Richard T.; Armstrong, Alan J.; Glover, Neal;, Assignee: Cirrus Logic, Inc. (Fremont, CA) |
Frequency response compensation circuit
The present invention is a frequency response compensator comprising a first forward gain stage and a second reverse gain stage coupled to the forward gain stage in negative feedback mode. The forward... Read More
Inventors: Jove, Stephen A.; Klaassen, Klaas B.; VanPeppen, Jacobus C. L.; Vo, Chon N.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Magnetic head drive circuit
It is therefore a principal object of the present invention to provide a magnetic head drive circuit whereby opto-magnetic recording with good recording characteristics may be accomplished without the... Read More
Inventors: Omori, Takashi; Fujiie, Kazuhiko;, Assignee: Sony Corporation (Tokyo, JP) |
Low-noise preamplifier for magneto-resistive heads
OF ILLUSTRATIVE EMBODIMENTS Referring now to the drawing, the preamplifier (10) includes an input CMOS transistor (12) having a source (13), drain 14, and base 15, and which is serially connected wit... Read More
Inventors: Klein, Hans W.; Petersen, Corey D.;, Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN) |
Magnetic field modulation magnet-optical recording apparatus in which an FM modulator and a magnetic head driving circuit are used in common
An object of the present invention is to simplify the structure of a magnetic field modulation magnet-optical recording apparatus. Another object of the present invention is to realize down-sizing of ... Read More
Inventors: Fuji, Hiroshi;, Assignee: Sharp Kabushiki Kaisha (Osaka, JP) |
Magnetic head driving circuit with impedance elements to balance auxiliary coil loads
One object of the present invention is to record data at a high speed by providing the same amount of current to a magnetic head coil in one direction and in the opposite direction in a magnetic head ... Read More
Inventors: Fuji, Hiroshi; Ishii, Mitsuo;, Assignee: Sharp Kabushiki Kaisha (Osaka, JP) |
Magneto-optical head circuit for minimizing the overshoot reversing current
We claim: 1. An apparatus for generating a modulated magnetic field for magneto-optical recording, comprising: a magnetic head coil, a first additional inductive coil, and a second additional inductiv... Read More
Inventors: Shibuya, Giichi; Shibahara, Masanori; Onodera, Takashi;, Assignee: TDK Corporation (Tokyo, JP) |
Balanced arrangement for reading information from a track on a record carrier which arrangement includes amplifier circuits containing cut-off capacitors which are cross-coupled to reduce noise
OF THE PREFERRED EMBODIMENTS FIG. 1 shows the basic circuit construction of the arrangement known from U.S. Pat. No. 5,270,882, which comprises a read head (not shown) having a magneto-resistive (MR)... Read More
Inventors: Voorman, Johannes O.; Ramalho, Joao N. V. L.;, Assignee: U.S. Philips Corporation (New York, NY) |
Library unit for calculating inclination of an accessor to correct positioning information of the accessor
Accordingly, it is a general object of this invention to provide a library unit in which the above-mentioned problems are eliminated. A more specific object of the present invention is to provide a li... Read More
Inventors: Shimada, Hiroshi; Tanaka, Kiyotaka; Ohnaka, Katsufumi; Matsuzaki, Noriaki; Asahara, Takahiro;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Magnetic recorder/reproducer
Accordingly, an essential object of the present invention is to provide a magnetic recorder/reproducer which can reduce noise caused by a silted rotary head and by errors in the tape travelling direct... Read More
Inventors: Endo, Kazuhito; Ishida, Masayuki; Ishida, Yoshinobu;, Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP) |
Time changing system for VTR
FIG. 1 shows a tape 10 that moves in the direction of arrow 12 due to the capstan motor 14. Motor 14 is speed regulated by control loop 16. A headwheel 18 has playback heads (not shown) mounted there... Read More
Inventors: Hurst, Robert N.;, Assignee: RCA Corporation (New York, NY) |
Method and apparatus for producing and selectively equalizing a temporal relationship between series of digital signals
Therefore, with the foregoing in mind it is a primary object of the present invention to provide a new and improved method of, and apparatus for, producing and selectively equalizing a temporal relati... Read More
Inventors: Lagadec, Roger;, Assignee: Willi Studer AG (Regensdorf, CH) |
Noise reduction circuit for reducing noise in a color signal of a color video signal
Accordingly it is a general object of the present invention to provide a novel and useful noise reduction circuit for a color video signal, in which the disadvantages described heretofore have been ov... Read More
Inventors: Nakagaki, Shintaro; Kuriyama, Takashi;, Assignee: Victor Company of Japan, Ltd. (Yokohama, JP) |
TV Signal 
