Patents by Inventor Jongseung Park
Jongseung Park has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10497390Abstract: Embodiments described herein provide methods and systems for correcting a transient phase error induced while recording on a magnetic recording medium. An input signal is received and is distributed to a plurality of sinc filters. A respective phase-shifted signal is generated at each of the plurality of sinc filters by adding a corresponding predetermined amount of phase to the received signals. A respective score is assigned to each of the generated phase-shifted signals. The generated phase-shifted signal having the highest score is selected as the phase-corrected signal to compensate for the transient phase error induced while recording on the magnetic recording medium.Type: GrantFiled: January 31, 2019Date of Patent: December 3, 2019Assignee: Marvell International Ltd.Inventors: Jongseung Park, Michael Madden
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Patent number: 10152999Abstract: A data processing system is disclosed including a data detector, a data decoder and an alignment detector. The data detector is operable to apply a data detection algorithm to generate detected values for a data sector. The data decoder is operable to apply a data decode algorithm to a decoder input derived from the detected values to yield decoded values. The alignment detector is operable to calculate an offset between multiple versions of the data sector by correlating the multiple versions.Type: GrantFiled: July 26, 2013Date of Patent: December 11, 2018Assignee: Avago Technologies International Sales Pte. LimitedInventors: Shaohua Yang, George Mathew, Jefferson E. Singleton, Jongseung Park, Richard Rauschmayer
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Patent number: 9786316Abstract: An apparatus for two-dimensional magnetic recording includes an array reader comprising a number of read sensors configured to read data from at least one track on a storage medium, a number of two-dimensional equalizer circuits each comprising inputs for receiving signals derived from each of the read sensors, each comprising an equalized output, and a number of iterative inter-track interference cancellation circuits, each operable to cancel inter-track interference in a different one of the equalized outputs from the two-dimensional equalizer circuits.Type: GrantFiled: December 2, 2015Date of Patent: October 10, 2017Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.Inventors: George Mathew, Jongseung Park, Richard Rauschmayer, Bruce A. Wilson
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Publication number: 20170162224Abstract: An apparatus for two-dimensional magnetic recording includes an array reader comprising a number of read sensors configured to read data from at least one track on a storage medium, a number of two-dimensional equalizer circuits each comprising inputs for receiving signals derived from each of the read sensors, each comprising an equalized output, and a number of iterative inter-track interference cancellation circuits, each operable to cancel inter-track interference in a different one of the equalized outputs from the two-dimensional equalizer circuits.Type: ApplicationFiled: December 2, 2015Publication date: June 8, 2017Inventors: George Mathew, Jongseung Park, Richard Rauschmayer, Bruce A. Wilson
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Patent number: 9570105Abstract: Systems and methods are disclosed for data processing, and more particularly for equalizing a data signal during both real time (i.e., on the fly) and retry operation. The system may include a first equalizer circuit operable to equalize a first sample set, and a second equalizer circuit operable to equalize a second sample set. The system may include a third equalizer circuit operable to equalize a summed data set to yield a third equalized output. The system may include a summation circuit connected to the first equalizer circuit, the second equalizer circuit, and a switch circuit. The summation circuit is operable to sum at least the first equalized data set and the second equalized data set to yield the summed data set. The switch circuit selectively provides the third equalized data set to the summation circuit.Type: GrantFiled: December 14, 2015Date of Patent: February 14, 2017Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: George Mathew, Jongseung Park, Han Fang, Richard Rauschmayer
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Patent number: 9524748Abstract: Embodiments are related to systems and methods for data processing, and more particularly to systems and methods for multi-dimensional signal equalization. In one case, a data processing system is discussed that includes: a first equalizer governed at least in part by a first coefficient; a second equalizer circuit governed at least in part by a second coefficient; and a constraint circuit operable to force a sum of at least the first coefficient and the second coefficient to equal a defined value.Type: GrantFiled: December 8, 2014Date of Patent: December 20, 2016Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Jongseung Park, George Mathew
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Patent number: 9382114Abstract: The present invention provides a heat exchange type prereformer comprising a shell side having a channel to which cathode exhaust gas is supplied and through which cathode exhaust gas flows so that heat can be exchanged between the cathode exhaust gas and the mixture gas supplied for preforming; a catalyst layer arranged so as to overlap one area of the shell side and formed to cause the mixture gas to have a prereforming reaction; and a tube side connected to the catalyst layer and arranged so as to overlap the other area of the shell side and formed to cause the prereformed mixture gas to exchange heat with the cathode exhaust gas.Type: GrantFiled: December 28, 2012Date of Patent: July 5, 2016Assignee: DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD.Inventors: Choamun Yun, Jongseung Park, Taehee Kim, Gipung Lee, Taewon Lee
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Publication number: 20160163352Abstract: Embodiments are related to systems and methods for data processing, and more particularly to systems and methods for multi-dimensional signal equalization. In one case, a data processing system is discussed that includes: a first equalizer governed at least in part by a first coefficient; a second equalizer circuit governed at least in part by a second coefficient; and a constraint circuit operable to force a sum of at least the first coefficient and the second coefficient to equal a defined value.Type: ApplicationFiled: December 8, 2014Publication date: June 9, 2016Inventors: Jongseung Park, George Mathew
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Patent number: 9245559Abstract: A method of mitigating an effect of track misregistration on read performance in a system comprising an array-reader includes determining an estimated off-track condition, selecting translation coefficients based on the estimated off-track condition, determining updated equalizer coefficients by applying the translation coefficients to native equalizer coefficients, and applying the updated equalizer coefficients to signals received from the array-reader to output a read signal.Type: GrantFiled: April 28, 2014Date of Patent: January 26, 2016Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: George Mathew, Jongseung Park, Eui Seok Hwang
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Publication number: 20150255101Abstract: A method of mitigating an effect of track misregistration on read performance in a system comprising an array-reader includes determining an estimated off-track condition, selecting translation coefficients based on the estimated off-track condition, determining updated equalizer coefficients by applying the translation coefficients to native equalizer coefficients, and applying the updated equalizer coefficients to signals received from the array-reader to output a read signal.Type: ApplicationFiled: April 28, 2014Publication date: September 10, 2015Applicant: LSI CorporationInventors: George Mathew, Jongseung Park, Eui Seok Hwang
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Patent number: 9129648Abstract: An apparatus for reading data includes an array of analog inputs operable to receive analog signals retrieved from a magnetic storage medium, wherein the analog inputs correspond to multiple data tracks on the magnetic storage medium, and wherein the number of analog inputs in the array of analog inputs is greater than the number of data tracks being read, at least one joint equalizer operable to filter the analog inputs to yield an equalized output for each of the data tracks being read, and at least one data detector operable to apply a detection algorithm to the equalized output from the joint equalizer to yield detected values for each of the data tracks being read.Type: GrantFiled: January 17, 2014Date of Patent: September 8, 2015Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.Inventors: George Mathew, Bruce A. Wilson, Jongseung Park
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Publication number: 20150199991Abstract: An apparatus for reading data includes an array of analog inputs operable to receive analog signals retrieved from a magnetic storage medium, wherein the analog inputs correspond to multiple data tracks on the magnetic storage medium, and wherein the number of analog inputs in the array of analog inputs is greater than the number of data tracks being read, at least one joint equalizer operable to filter the analog inputs to yield an equalized output for each of the data tracks being read, and at least one data detector operable to apply a detection algorithm to the equalized output from the joint equalizer to yield detected values for each of the data tracks being read.Type: ApplicationFiled: January 17, 2014Publication date: July 16, 2015Applicant: LSI CorporationInventors: George Mathew, Bruce A. Wilson, Jongseung Park
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Publication number: 20150170676Abstract: A method of reading data in a multi-reader two-dimensional magnetic recording system includes determining a position of a multi-reader head, selecting a mode for reading the data of a magnetic recording medium as a function of the position of the multi-reader head, and reading the data of the magnetic recording medium in the selected mode.Type: ApplicationFiled: February 4, 2014Publication date: June 18, 2015Applicant: LSI CorporationInventors: Eui Seok Hwang, George Mathew, Jongseung Park
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Patent number: 8970976Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for reducing inter-track interference in relation to processing data retrieved from a storage medium.Type: GrantFiled: October 24, 2013Date of Patent: March 3, 2015Assignee: LSI CorporationInventors: Eui Seok Hwang, Jongseung Park, Ivana Djurdjevic, Richard Rauschmayer
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Publication number: 20150015984Abstract: Described embodiments provide a method of cancelling inter-track interference (ITI) from one or more sectors read from a desired track of a storage medium. A read channel reads sectors in a desired track of the storage medium. A decoder of the read channel decodes the read sectors, and if the read sectors are incorrectly recovered from the storage medium, selected sectors of a first adjacent track and a second adjacent track are read. An ITI canceller of the read channel estimates ITI in the read sectors of the desired track corresponding to the selected sectors of each adjacent track and subtracts the estimated ITI of each adjacent track from the data for the sectors of the desired track, providing updated sector data. The ITI cancelled data is replayed to the decoder, Which decodes the ITT cancelled data and provides the decoded ITI cancelled data as output of the read channel.Type: ApplicationFiled: September 29, 2014Publication date: January 15, 2015Applicant: LSI CorporationInventors: Ming Jin, Erich F. Haratsch, George Mathew, Jongseung Park, Timothy W. Swatosh, Timothy B. Lund, Carl E. Forham
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Publication number: 20150012800Abstract: A data processing system is disclosed including a data detector, a data decoder and an alignment detector. The data detector is operable to apply a data detection algorithm to generate detected values for a data sector. The data decoder is operable to apply a data decode algorithm to a decoder input derived from the detected values to yield decoded values. The alignment detector is operable to calculate an offset between multiple versions of the data sector by correlating the multiple versions.Type: ApplicationFiled: July 26, 2013Publication date: January 8, 2015Applicant: LSI CorporationInventors: Shaohua Yang, George Mathew, Jefferson E. Singleton, Jongseung Park, Richard Rauschmayer
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Publication number: 20140369900Abstract: The present invention provides a heat exchange type prereformer comprising a shell side having a channel to which cathode exhaust gas is supplied and through which cathode exhaust gas flows so that heat can be exchanged between the cathode exhaust gas and the mixture gas supplied for preforming; a catalyst layer arranged so as to overlap one area of the shell side and formed to cause the mixture gas to have a prereforming reaction; and a tube side connected to the catalyst layer and arranged so as to overlap the other area of the shell side and formed to cause the prereformed mixture gas to exchange heat with the cathode exhaust gas.Type: ApplicationFiled: December 28, 2012Publication date: December 18, 2014Applicant: DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD.Inventors: Choamun Yun, Jongseung Park, Taehee Kim, Gipung Lee, Taewon Lee
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Patent number: 8902524Abstract: Hardware-based methods and apparatus are provided for inter-track interference mitigation in magnetic recording systems using averaged values. Inter-track interference (ITI) is mitigated in a magnetic recording system by obtaining ITI cancellation data; and providing the ITI cancellation data for ITI mitigation, wherein the ITI mitigation is performed in combination with an averaging procedure for one or more of ITI mitigation of averaged data and averaging of ITI mitigated data. The sector is optionally decoded using the ITI mitigated samples. Samples for one or more side track sectors can also be averaged. The averaged side track samples can be provided as ITI cancellation data for ITI mitigation. The averaging procedure optionally applies a scaling factor to each read value.Type: GrantFiled: March 15, 2013Date of Patent: December 2, 2014Assignee: LSI CorporationInventors: Erich F. Haratsch, Ming Jin, George Mathew, Jongseung Park, Kurt J. Worrell
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Patent number: 8879182Abstract: Described embodiments provide a method of cancelling inter-track interference (ITI) from one or more sectors read from a desired track of a storage medium. A road channel reads sectors in a desired track of the storage medium. A decoder of the read channel decodes the read sectors, and if the read sectors are incorrectly recovered from the storage medium, selected sectors of a first adjacent track and a second adjacent track are read. An ITI canceller of the read channel estimates ITI in the read sectors of the desired track corresponding to the selected sectors of each adjacent track and subtracts the estimated ITI of each adjacent track from the data for the sectors of the desired track, providing updated sector data. The ITI cancelled data is replayed to the decoder, which decodes the ITI cancelled data and provides the decoded ITI cancelled data as output of the read channel.Type: GrantFiled: August 22, 2012Date of Patent: November 4, 2014Assignee: LSI CorporationInventors: Erich Franz Haratsch, George Mathew, Ming Jin, Jongseung Park, Timothy W. Swatosh, Timothy B. Lund, Carl E. Forhan
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Patent number: 8861113Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for adapting noise predictive filters for inter-track interference cancellation in a data processing system.Type: GrantFiled: February 26, 2013Date of Patent: October 14, 2014Assignee: LSI CorporationInventors: Jun Xiao, Jongseung Park, Fan Zhang, Ivana Djurdjevic