Patents by Inventor Masaharu Kondo
Masaharu Kondo 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: 11913910Abstract: A measuring device for measuring an inspection target on the basis of vibration generated when the inspection target has been irradiated with laser light includes a condensing position deriving portion configured to derive an amount of adjustment of a distance between condensing lenses of a laser condensing unit configured to condense the laser light on the basis of a distance between a laser device configured to radiate the laser light and an irradiation location of the laser light and a communicating portion configured to transmit control information including information representing the amount of adjustment to the laser condensing unit.Type: GrantFiled: April 17, 2023Date of Patent: February 27, 2024Assignee: National Institutes for Quantum and Radiological Science and TechnologyInventors: Katsuhiro Mikami, Toshiyuki Kitamura, Shuji Kondo, Hajime Okada, Tetsuya Kawachi, Yoshinori Shimada, Shinri Kurahashi, Masaharu Nishikino, Noboru Hasegawa
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Publication number: 20160251216Abstract: To provide a photochemical reactor that allows a photochemical reaction to proceed in the atmospheric air. Used is porous glass that is permeable to light in such a wavelength region as to be absorbable by photosensitizer. The porous glass has pores and includes the photosensitizer, electron carrier, and reduction reaction catalyst, each serving as a reaction-involved substance and being disposed in the pores. This allows the interior of the pores of the porous glass to serve as a reaction site for the photochemical reaction and allows the photochemical reaction to proceed in the atmospheric air.Type: ApplicationFiled: July 30, 2014Publication date: September 1, 2016Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Masaharu KONDO, Tomoyasu NOJI, Takehisa DEWA, Tetsuro JIN
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Patent number: 7046745Abstract: In a data demodulating method, predetermined input data is demodulated based upon a response characteristic of the partial response class 4; the demodulated input data is discrete-filtered to thereby produce filtering data; and the filtering data is maximum likelihood-decoded to thereby produce asymmetrical response data. Further, a magnetic recording/reproducing apparatus is arranged by using this data demodulating method.Type: GrantFiled: November 13, 2001Date of Patent: May 16, 2006Assignee: Hitachi, Ltd.Inventors: Seiichi Mita, Hideki Sawaguchi, Naoya Kobayashi, Masaharu Kondo
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Publication number: 20050117871Abstract: A signal processing circuit having a data sync signal detector and a disk device. Input data read from a magnetic disk is input to a data discriminator. A data discrimination output constituting a code bit output discriminated by the data discriminator is input to a post-coder the output of which is input to a decoder and a (1+D) processing unit. The processed output of the processing unit is input to an error detection/correction unit and separated into bit strings of odd numbered bits and even numbered bits, divided into groups. An error detection/correction output is input to a data sync signal detector, and matched against a sync pattern. When the number of coincident groups is greater than a threshold value, a sync signal is output and upon detection causes the decoder to demodulate the data.Type: ApplicationFiled: January 4, 2005Publication date: June 2, 2005Inventors: Yoshiju Watanabe, Masaharu Kondo
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Patent number: 6873665Abstract: A digital magnetic recording/reproducing apparatus includes an LVA (List Viterbi Algorithm) detector which produces first to nth best sequences (n>1) of a decoded result, and replaces a likelihood ratio and a path memory of the ith best sequence (i=2, 3, . . . , n) with those of the (2i?1)th best sequence when contents of path memories of the (i?1)th and ith best sequences are equal to each other and an absolute value of a difference between likelihood ratios of the (i?1)th and (2i?1)th best sequences is smaller than a decision threshold. Alternatively, the LVA detector initializes a likelihood ratio of the ith best sequence to be a likelihood ratio of the (i?1)th best sequence with a constant difference value added thereto when contents of path memories of the (i?1)th and ith best sequences are equal to each other.Type: GrantFiled: June 25, 2001Date of Patent: March 29, 2005Assignee: Hitachi, Ltd.Inventors: Naoya Kobayashi, Seiichi Mita, Masaharu Kondo, Hideki Sawaguchi, Takashi Moriyasu
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Patent number: 6856660Abstract: A signal processing circuit having a data sync signal detector and a disk device. Input data read from a magnetic disk is input to a data discriminator. A data discrimination output constituting a code bit output discriminated by the data discriminator is input to a post-coder the output of which is input to a decoder and a (1+D) processing unit. The processed output of the processing unit is input to an error detection/correction unit and separated into bit strings of odd numbered bits and even numbered bits, divided into groups. An error detection/correction output is input to a data sync signal detector, and matched against a sync pattern. When the number of coincident groups is greater than a threshold value, a sync signal is output and upon detection causes the decoder to demodulate the data.Type: GrantFiled: September 21, 1999Date of Patent: February 15, 2005Assignee: Hitachi, Ltd.Inventors: Yoshiju Watanabe, Masaharu Kondo
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Patent number: 6842875Abstract: A signal processing apparatus capable of reducing burst error generation, and a highly reliable data recording/reproducing apparatus using this signal processing apparatus. This signal processing apparatus has a simple error detection/correction circuit provided just before a modulated code demodulator, thereby correcting error of a pattern easy to occur in a maximum likelihood decoder. The simple error detection/correction circuit is an error detection/correction circuit using a linear error correction code, for example, an error correction code (CRCC) formed of a cyclic code. Thus the number of burst errors after the modulated code demodulator can be decreased.Type: GrantFiled: October 15, 2002Date of Patent: January 11, 2005Assignee: Hitachi, Ltd.Inventors: Masaharu Kondo, Seiichi Mita
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Publication number: 20040181737Abstract: A recording/reproducing apparatus for recording in a recording medium the interleaved data with an error correcting code added thereto and reproducing the recorded data from the recording medium, wherein the error correcting coding process is performed using an elliptic code on a finite field GF(2m) where m is a positive integer.Type: ApplicationFiled: March 19, 2004Publication date: September 16, 2004Applicant: HITACHI, LTDInventors: Masaharu Kondo, Terumi Takashi
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Patent number: 6728052Abstract: A recording/reproducing apparatus for recording in a recording medium the interleaved data with an error correcting code added thereto and reproducing the recorded data from the recording medium, wherein the error correcting coding process is performed using an elliptic code on a finite field GF(2m) where m is a positive integer.Type: GrantFiled: June 26, 2001Date of Patent: April 27, 2004Assignee: Hitachi, Ltd.Inventors: Masaharu Kondo, Terumi Takashi
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Publication number: 20030037300Abstract: A signal processing apparatus capable of reducing burst error generation, and a highly reliable data recording/reproducing apparatus using this signal processing apparatus. This signal processing apparatus has a simple error detection/correction circuit provided just before a modulated code demodulator, thereby correcting error of a pattern easy to occur in a maximum likelihood decoder. The simple error detection/correction circuit is an error detection/correction circuit using a linear error correction code, for example, an error correction code (CRCC) formed of a cyclic code. Thus the number of burst errors after the modulated code demodulator can be decreased.Type: ApplicationFiled: October 15, 2002Publication date: February 20, 2003Applicant: Hitachi, Ltd.Inventors: Masaharu Kondo, Seiichi Mita
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Patent number: 6493846Abstract: A signal processing apparatus capable of reducing burst error generation, and a highly reliable data recording/reproducing apparatus using this signal processing apparatus. This signal processing apparatus has a simple error detection/correction circuit provided just before a modulated code demodulator, thereby correcting error of a pattern easy to occur in a maximum likelihood decoder. The simple error detection/correction circuit is an error detection/correction circuit using a linear error correction code, for example, an error correction code (CRCC) formed of a cyclic code. Thus the number of burst errors after the modulated code demodulator can be decreased.Type: GrantFiled: June 1, 1999Date of Patent: December 10, 2002Assignee: Hitachi, Ltd.Inventors: Masaharu Kondo, Seiichi Mita
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Publication number: 20020064242Abstract: In a data demodulating method, predetermined input data is demodulated based upon a response characteristic of the partial response class 4; the demodulated input data is discrete-filtered to thereby produce filtering data; and the filtering data is maximum likelihood-decoded to thereby producing asymmetrical response data. Further, a magnetic recording/reproducing apparatus is arranged by using this data demodulating method.Type: ApplicationFiled: November 13, 2001Publication date: May 30, 2002Inventors: Seiichi Mita, Hideki Sawaguchi, Naoya Kobayashi, Masaharu Kondo
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Publication number: 20020060873Abstract: A recording/reproducing apparatus for recording in a recording medium the interleaved data with an error correcting code added thereto and reproducing the recorded data from the recording medium, wherein the error correcting coding process is performed using an elliptic code on a finite field GF(2m) where m is a positive integer.Type: ApplicationFiled: June 26, 2001Publication date: May 23, 2002Inventors: Masaharu Kondo, Terumi Takashi
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Patent number: 6337889Abstract: In a data demodulating method, predetermined input data is based upon a response characteristic of the partial response class 4. The predetermined input data is discrete-filtered to thereby produce filtered asymmetrical data. The filtered asymmetrical data is maximum-likelihood-decoded to thereby produce decoded data that is demodulated. Further, a magnetic recording/reproducing apparatus is arranged by using this data demodulating method.Type: GrantFiled: July 30, 1998Date of Patent: January 8, 2002Assignee: Hitachi, Ltd.Inventors: Seiichi Mita, Hideki Sawaguchi, Naoya Kobayashi, Masaharu Kondo
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Patent number: 6320916Abstract: A digital magnetic recording/reproducing apparatus that has an LVA detector, and that is able to maintain the coding rate as high as {fraction (8/9)} or more, and record at a higher density than in the prior art, wherein, in order that the data sequences up to the (2n−1)th best sequence (n>1) are obtained in the order of higher likelihood ratios, and that. the candidates of those data sequences can be produced, the LVA detector has provided therein a unit which replaces the likelihood ratio and path memory of the ith best sequence by those of the (2i−1)th best sequence when the contents of the (i−1)th path memory coincide with those of the ith path memory (i=2, 3, . . .Type: GrantFiled: November 3, 1998Date of Patent: November 20, 2001Assignee: Hitachi, Ltd.Inventors: Naoya Kobayashi, Seiichi Mita, Masaharu Kondo, Hideki Sawaguchi, Takashi Moriyasu
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Publication number: 20010036236Abstract: A digital magnetic recording/reproducing apparatus includes an LVA (List Viterbi Algorithm) detector which produces first to nth best sequences (n>1) of a decoded result, and replaces a likelihood ratio and a path memory of the ith best sequence (i=2, 3, . . . , n) with those of the (2i−1)th best sequence when contents of path memories of the (i−1)th and ith best sequences are equal to each other and an absolute value of a difference between likelihood ratios of the (i−1)th and (2i−1)th best sequences is smaller than a decision threshold. Alternatively, the LVA detector initializes a likelihood ratio of the ith best sequence to be a likelihood ratio of the (i−1)th best sequence with a constant difference value added thereto when contents of path memories of the (i−1)th and ith best sequences are equal to each other.Type: ApplicationFiled: June 25, 2001Publication date: November 1, 2001Inventors: Naoya Kobayashi, Seiichi Mita, Masaharu Kondo, Hideki Sawaguchi, Takashi Moriyasu