Patents by Inventor Ichiro Kikuchi
Ichiro Kikuchi 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: 8788916Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: GrantFiled: July 20, 2012Date of Patent: July 22, 2014Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 8635513Abstract: Systems and methods are provided for implementing list decoding in a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. The soft-information can be organized into an order of combinations of error events for list decoding. An RS decoder can employ a list decoder that uses a pipelined list decoder architecture. The list decoder can include one or more syndrome modification circuits that can compute syndromes in parallel. A long division circuit can include multiple units that operate to compute multiple quotient polynomial coefficients in parallel. The list decoder can employ iterative decoding and a validity test to generate error indicators. The iterative decoding and validity test can use the lower syndromes.Type: GrantFiled: February 1, 2012Date of Patent: January 21, 2014Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 8527850Abstract: Systems and methods are provided for implementing error identification and evaluation for a Reed-Solomon (RS) error-correction code (ECC) system. The BMA algorithm and/or list decoding may produce one or more error locator polynomials that are related to a decision-codeword. An accelerated Chien search can be used to more quickly evaluate the one or more error locator polynomial. If the accelerated Chien search identifies a valid error locator polynomial, a normal Chien search can be used to identify error locations, and Forney's algorithm or an equivalent technique can be used to evaluate the error values. A RS ECC decoder can include a computation circuit that evaluates an error locator polynomial or an error evaluator polynomial. The computation circuit can include computation components that receive the coefficients of the polynomials.Type: GrantFiled: August 13, 2012Date of Patent: September 3, 2013Assignee: Marvell International Ltd.Inventors: Ichiro Kikuchi, Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Tony Yoon
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Publication number: 20120284588Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: ApplicationFiled: July 20, 2012Publication date: November 8, 2012Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 8296635Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: GrantFiled: February 2, 2012Date of Patent: October 23, 2012Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 8245118Abstract: Systems and methods are provided for implementing error identification and evaluation for a Reed-Solomon (RS) error-correction code (ECC) system. The BMA algorithm and/or list decoding may produce one or more error locator polynomials that are related to a decision-codeword. An accelerated Chien search can be used to more quickly evaluate the one or more error locator polynomial. If the accelerated Chien search identifies a valid error locator polynomial, a normal Chien search can be used to identify error locations, and Forney's algorithm or an equivalent technique can be used to evaluate the error values. A RS ECC decoder can include a computation circuit that evaluates an error locator polynomial or an error evaluator polynomial. The computation circuit can include computation components that receive the coefficients of the polynomials.Type: GrantFiled: July 30, 2009Date of Patent: August 14, 2012Assignee: Marvell International Ltd.Inventors: Ichiro Kikuchi, Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Tony Yoon
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Patent number: 8219894Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: GrantFiled: November 26, 2008Date of Patent: July 10, 2012Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Publication number: 20120137197Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: ApplicationFiled: February 2, 2012Publication date: May 31, 2012Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 8132083Abstract: Systems and methods are provided for implementing list decoding in a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. The soft-information can be organized into an order of combinations of error events for list decoding. An RS decoder can employ a list decoder that uses a pipelined list decoder architecture. The list decoder can include one or more syndrome modification circuits that can compute syndromes in parallel. A long division circuit can include multiple units that operate to compute multiple quotient polynomial coefficients in parallel. The list decoder can employ iterative decoding and a validity test to generate error indicators. The iterative decoding and validity test can use the lower syndromes.Type: GrantFiled: August 14, 2009Date of Patent: March 6, 2012Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 8132082Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: GrantFiled: October 10, 2008Date of Patent: March 6, 2012Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Publication number: 20090292976Abstract: Systems and methods are provided for implementing error identification and evaluation for a Reed-Solomon (RS) error-correction code (ECC) system. The BMA algorithm and/or list decoding may produce one or more error locator polynomials that are related to a decision-codeword. An accelerated Chien search can be used to more quickly evaluate the one or more error locator polynomial. If the accelerated Chien search identifies a valid error locator polynomial, a normal Chien search can be used to identify error locations, and Forney's algorithm or an equivalent technique can be used to evaluate the error values. A RS ECC decoder can include a computation circuit that evaluates an error locator polynomial or an error evaluator polynomial. The computation circuit can include computation components that receive the coefficients of the polynomials.Type: ApplicationFiled: July 30, 2009Publication date: November 26, 2009Applicant: Marvell International Ltd.Inventors: Ichiro Kikuchi, Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Tony Yoon
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Patent number: 7590923Abstract: Systems and methods are provided for implementing error identification and evaluation for a Reed-Solomon (RS) error-correction code (ECC) system. The BMA algorithm and/or list decoding may produce one or more error locator polynomials that are related to a decision-codeword. An accelerated Chien search can be used to more quickly evaluate the one or more error locator polynomial. If the accelerated Chien search identifies a valid error locator polynomial, a normal Chien search can be used to identify error locations, and Forney's algorithm or an equivalent technique can be used to evaluate the error values. A RS ECC decoder can include a computation circuit that evaluates an error locator polynomial or an error evaluator polynomial. The computation circuit can include computation components that receive the coefficients of the polynomials.Type: GrantFiled: August 1, 2005Date of Patent: September 15, 2009Assignee: Marvell International Ltd.Inventors: Ichiro Kikuchi, Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Tony Yoon
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Patent number: 7590924Abstract: Systems and methods are provided for implementing list decoding in a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. The soft-information can be organized into an order of combinations of error events for list decoding. An RS decoder can employ a list decoder that uses a pipelined list decoder architecture. The list decoder can include one or more syndrome modification circuits that can compute syndromes in parallel. A long division circuit can include multiple units that operate to compute multiple quotient polynomial coefficients in parallel. The list decoder can employ iterative decoding and a validity test to generate error indicators. The iterative decoding and validity test can use the lower syndromes.Type: GrantFiled: October 23, 2008Date of Patent: September 15, 2009Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Publication number: 20090083608Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: ApplicationFiled: November 26, 2008Publication date: March 26, 2009Applicant: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Publication number: 20090063937Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: ApplicationFiled: October 10, 2008Publication date: March 5, 2009Applicant: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Publication number: 20090055717Abstract: Systems and methods are provided for implementing list decoding in a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. The soft-information can be organized into an order of combinations of error events for list decoding. An RS decoder can employ a list decoder that uses a pipelined list decoder architecture. The list decoder can include one or more syndrome modification circuits that can compute syndromes in parallel. A long division circuit can include multiple units that operate to compute multiple quotient polynomial coefficients in parallel. The list decoder can employ iterative decoding and a validity test to generate error indicators. The iterative decoding and validity test can use the lower syndromes.Type: ApplicationFiled: October 23, 2008Publication date: February 26, 2009Applicant: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 7454690Abstract: Systems and methods are provided for implementing list decoding in a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. The soft-information can be organized into an order of combinations of error events for list decoding. An RS decoder can employ a list decoder that uses a pipelined list decoder architecture. The list decoder can include one or more syndrome modification circuits that can compute syndromes in parallel. A long division circuit can include multiple units that operate to compute multiple quotient polynomial coefficients in parallel. The list decoder can employ iterative decoding and a validity test to generate error indicators. The iterative decoding and validity test can use the lower syndromes.Type: GrantFiled: August 1, 2005Date of Patent: November 18, 2008Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 7444582Abstract: Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.Type: GrantFiled: August 1, 2005Date of Patent: October 28, 2008Assignee: Marvell International Ltd.Inventors: Siu-Hung Fred Au, Gregory Burd, Zining Wu, Jun Xu, Ichiro Kikuchi, Tony Yoon
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Patent number: 5625560Abstract: A process rule storage unit stores a row of processes before and after each process in a process flow storage unit, a row of processes which must not exist before and after the process and a row of processes which are allowed to exist before and after process but require an operator's judgment. The process rule detection unit retrieves the process rule storage unit, and compares each process code in a row of processes with the process codes in the process flow storage unit to detect whether both condition codes agree with each other.Type: GrantFiled: December 21, 1994Date of Patent: April 29, 1997Assignee: NEC CorporationInventor: Ichiro Kikuchi
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Apparatus and method for measuring a temperature of a high temperature liquid contained in a furnace
Patent number: 5585914Abstract: An apparatus and method for measuring a temperature of a high temperature liquid contained in a furnace. An optical fiber covered with a metallic tube is inserted through a passageway inside a nozzle arranged on a furnace wall of the furnace. The nozzle communicates with an interior of the furnace containing the liquid, and gas is supplied into the passageway inside the nozzle to prevent the nozzle from clogging. The metal-covered optical fiber is fed through the passageway inside the nozzle into the liquid such that spectral light radiated from the liquid enters a tip of the metal-covered optical fiber and is propagated therealong. The temperature of the liquid is determined by a radiation thermometer, coupled to the metal-covered optical fiber, based on the spectral light propagated along the metal-covered optical fiber.Type: GrantFiled: October 4, 1994Date of Patent: December 17, 1996Assignee: NKK CorporationInventors: Mitsuo Yamasaki, Shigeru Inoue, Ichiro Kikuchi, Masaki Komatani, Genji Kanatani, Masao Hiroko, Takafumi Yoshikawa, Masashi Edahiro, Yoshimi Komatsu, Akihiko Inoue, Hideaki Mizukami, Takeshi Murai, Hideo Nakamura, Yoshiro Yamada, Yuji Adachi, Hirofumi Nakamura, Keiichi Miyoshi, Kazusi Miyamoto, Masao Doi, Shirou Takene