Patents by Inventor Katsumi Arisaka
Katsumi Arisaka 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: 10630356Abstract: A communication apparatus having a plurality of antennas, comprises a communication unit configured to communicate with an external apparatus with the plurality of antennas, a detection unit configured to detect a status of the communication apparatus, and a specifying unit configured to specify a noise component mixed in signals received from the external apparatus according to the status of the communication apparatus.Type: GrantFiled: October 29, 2018Date of Patent: April 21, 2020Assignee: Canon Kabushiki KaishaInventors: Teruki Kikkawa, Katsumi Arisaka
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Publication number: 20190140718Abstract: A communication apparatus having a plurality of antennas, comprises a communication unit configured to communicate with an external apparatus with the plurality of antennas, a detection unit configured to detect a status of the communication apparatus, and a specifying unit configured to specify a noise component mixed in signals received from the external apparatus according to the status of the communication apparatus.Type: ApplicationFiled: October 29, 2018Publication date: May 9, 2019Inventors: Teruki Kikkawa, Katsumi Arisaka
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Patent number: 7791996Abstract: A PLL circuit includes a wobbling detector for detecting a wobbling signal based on reflection light of an optical disk having a wobbled track, and a VCO that an oscillation frequency of its output varies according to its input. The PLL circuit controls the VCO based on a phase error between the output of the wobbling signal and the output of the VCO. In the PLL circuit, the phase error is detected by executing an arithmetic operation to the delta-sigma modulated wobbling signal at a predetermined clock and the output of the VCO.Type: GrantFiled: June 27, 2007Date of Patent: September 7, 2010Assignee: Canon Kabushiki KaishaInventor: Katsumi Arisaka
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Publication number: 20080008067Abstract: A PLL circuit includes a wobbling detector for detecting a wobbling signal based on reflection light of an optical disk having a wobbled track, and a VCO that an oscillation frequency of its output varies according to its input. The PLL circuit controls the VCO based on a phase error between the output of the wobbling signal and the output of the VCO. In the PLL circuit, the phase error is detected by executing an arithmetic operation to the delta-sigma modulated wobbling signal at a predetermined clock and the output of the VCO.Type: ApplicationFiled: June 27, 2007Publication date: January 10, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Katsumi Arisaka
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Patent number: 7200072Abstract: A recording/reproducing apparatus for a domain-wall-displacement magneto-optical recording medium with good format efficiency, capable of providing a good reproduction signal and securing a maximum recording region for a user is provided which comprises a recording circuit that starts recording of an information in a data region at a predetermined timing with a detection signal obtained in the preformat region being used as a reference, and a reproducing circuit that starts reproducing of the information recorded in the data region at a timing earlier than the predetermined timing with the detection signal being used-as a reference.Type: GrantFiled: July 9, 2003Date of Patent: April 3, 2007Assignee: Canon Kabushiki KaishaInventor: Katsumi Arisaka
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Patent number: 7020049Abstract: In a magneto-optical disk drive using a domain wall moving magneto-optical recording medium, a test-writing operation adjustment to deal wit dynamic fluctuation factors is minimized, and a reproducing or recording laser power is automatically optimized. A power of a light beam by which a domain wall starts to move is detected, and a power of a laser used to reproduce or record an information is corrected based on a change in the domain wall movement starting power. As the domain wall movement starting power, it is possible to use, for example, when the power of a light beam is varied, such a power as to maximize a rate of change of the amplitude of a reproducing signal.Type: GrantFiled: April 24, 2003Date of Patent: March 28, 2006Assignees: Canon Kabushiki Kaisha, Matsushita Electric Industrial Co., Ltd.Inventors: Toshihiko Suzuki, Katsumi Arisaka, Takashi Inoue, Toshio Matsumoto
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Patent number: 6980491Abstract: There is provided a domain wall displacement type magneto-optical recording medium and a recording method that allow signals recorded with a high density over the limit of resolution of optical systems to be regenerated without increasing complexity of a recording and regenerating apparatus or narrowing an operation margin even if a substrate having address information or the like incorporated therein is used. An information track has portions used for recording and regenerating information in the form of a magneto-optical signal and portions having irregularities to provide address information or servo information formed therein alternately arranged, and directions of magnetization of the third magnetic layer are polarized in one direction above the portions having the irregularities.Type: GrantFiled: April 22, 2003Date of Patent: December 27, 2005Assignee: Canon Kabushiki KaishaInventors: Tsutomu Shiratori, Katsumi Arisaka
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Magneto-optical recording/reproducing apparatus capable of setting reproducing/recording laser power
Publication number: 20040017736Abstract: In a magneto-optical disk drive using a domain wall moving magneto-optical recording medium, the test-writing adjustment in operation to deal with dynamic fluctuation factors is minimized, and a reproducing or recording laser power is automatically optimized.Type: ApplicationFiled: April 24, 2003Publication date: January 29, 2004Applicants: CANON KABUSHIKI KAISHA, MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Toshihiko Suzuki, Katsumi Arisaka, Takashi Inoue, Toshio Matsumoto -
Publication number: 20030203243Abstract: There is provided a domain wall displacement type magneto-optical recording medium and a recording method that allow signals recorded with a high density over the limit of resolution of optical systems to be regenerated without increasing complexity of a recording and regenerating apparatus or narrowing an operation margin even if a substrate having address information or the like incorporated therein is used. An information track has portions used for recording and regenerating information in the form of a magneto-optical signal and portions having irregularities to provide address information or servo information formed therein alternately arranged, and directions of magnetization of the third magnetic layer are polarized in one direction above the portions having the irregularities.Type: ApplicationFiled: April 22, 2003Publication date: October 30, 2003Inventors: Tsutomu Shiratori, Katsumi Arisaka
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Patent number: 6377746Abstract: An image information recording apparatus is arranged to record compressed image information within a predetermined section of a recording tape extending from a beginning of the tape, to record non-compressed image information in another section located after the predetermined section, and to record, also within the predetermined section, positional information indicative of a position where the non-compressed image information which corresponds to the compressed image information is recorded on the tape, so that all recorded images are quickly graspable and any of the non-compressed images thus can be quickly extracted. Further, in recording image information of a plurality of kinds, a non-recorded area of a tape-shaped recording medium is divided and a divided recording area thus obtained is allocated to some of the image information of different kinds, so that the tape-shaped recording medium can be efficiently used.Type: GrantFiled: May 22, 1995Date of Patent: April 23, 2002Assignee: Canon Kabushiki KaishaInventors: Hideyuki Nishida, Tsunenori Yoshinari, Katsumi Arisaka, Toshiaki Shingu
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Patent number: 5822145Abstract: An information recording device, which includes a case, a magnetic record carrier provided within the case, at least one semiconductor integrated circuit having at least one semiconductor memory provided within the case, and terminals for inputting and outputting data to and from the semiconductor memory or the semiconductor integrated circuit. Further, a recording and/or reproducing apparatus using the device, includes a detection circuit for detecting the mounting of the information recording device, and a switching circuit for switching the state of use of a memory in the apparatus in accordance with an output of the detection circuit.Type: GrantFiled: September 6, 1994Date of Patent: October 13, 1998Assignee: Canon Kabushiki KaishaInventors: Hideyuki Nishida, Tsunenori Yoshinari, Katsumi Arisaka, Toshiaki Shingu, Kazunori Masuda
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Patent number: 5638229Abstract: A method for setting an information reader to a target information recorded position on an information recording medium in an information reproducing apparatus includes steps of reading a start position from the medium by the reader, which contacts the medium, separating the reader from the medium after reading the current position, driving the medium after separating the reader from the medium, successively estimating a current read position based on the start position and a driving motion during the driving step, checking whether the estimated current read position matches a target position, contacting the reader with the medium and reading position information when the estimated current read position matches the target position, comparing the position represented by the read position information with the target position and driving the medium, contacting the reader, while reading the position information when a mismatch is detected, and comparing the position represented by the newly read position informatType: GrantFiled: January 30, 1995Date of Patent: June 10, 1997Assignee: Canon Kabushiki KaishaInventors: Toshiaki Shingu, Tsunenori Yoshinari, Hideyuki Nishida, Katsumi Arisaka
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Patent number: 5561565Abstract: A magnetic tape recording and/or reproducing apparatus comprises a tape-characteristic-information detecting circuit arranged to detect information on characteristics of a tape from a tape-characteristic-information recording area provided on the tape which is employed as a recording medium, and a circuit-constant setting circuit arranged to set circuit constants of necessary circuits on the basis of the output of the tape-characteristic-information detecting circuit.Type: GrantFiled: April 24, 1995Date of Patent: October 1, 1996Assignee: Canon Kabushiki KaishaInventors: Katsumi Arisaka, Tsunenori Yoshinari, Hideyuki Nishida, Toshiaki Shingu, Kazunori Masuda
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Patent number: 5249063Abstract: A signal processing device for processing an information signal is arranged to detect a signal included in the information signal and appearing during each given blanking period of the information signal in which a plurality of kinds of signals appear in sequence at intervals of the blanking period and the DC level of the information signal is offset according to the kind of a signal appearing during each of the blanking periods, to remove the DC level offset of each blanking period of the information signal by using the signal thus detected, and to identify the kind of signal included in the information signal by using the signal detected. The arrangement facilitates a reduction in size and weight of the device by reducing the number of external elements and the number of external-element connecting terminals.Type: GrantFiled: October 30, 1991Date of Patent: September 28, 1993Assignee: Canon Kabushiki KaishaInventor: Katsumi Arisaka
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Patent number: 5055351Abstract: A magnetic recording medium comprises at least a magnetic recording layer of a metal thin film on a substrate, wherein the stiffness 1/k.sub.O [kgfmm] of the whole medium is within the following range: ##EQU1## [n is a number of layers constituting the magnetic recording medium] E.sub.k : Young's modulus of the k th layer [unit:kgf/mm.sup.2 ]I.sub.k :moment of inertia of the k th layer [unit:mm.sup.3 ]and the shape of the medium is a disc shape.Type: GrantFiled: October 13, 1988Date of Patent: October 8, 1991Assignee: Canon Kabushiki KaishaInventors: Ryo Fujimoto, Katsumi Arisaka, Takao Sasakura, Hiroshi Takagi, Kenji Suzuki, Akira Shinmi, Rieko Kanome, Morimi Hashimoto, Nobuyuki Saito