Patents by Inventor Kiyohito Tokuda
Kiyohito Tokuda 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: 10430629Abstract: A computer-readable medium and an information processing device are provided that are capable of generating collation information that is unlikely to be affected by acquisition conditions of biometric information. An image is acquired (S1), and a base point is determined from the image (S2). Sample information indicating a change in color information of a surrounding area of the base point is acquired (S3). The sample information is information that associates a plurality of samples with center information corresponding to positions on the image of first reference points. The sample is information that associates color information of second reference points with position information of the second reference points. Based on the acquired sample information, frequency information is generated (S4). The frequency information associates the center information with a frequency component of a change in the color information with respect to the position information calculated for each of the first reference points.Type: GrantFiled: January 11, 2018Date of Patent: October 1, 2019Assignee: KABUSHIKI KAISHA DDSInventors: Kenji Miyoshino, Kiyohito Tokuda, Tatsuki Yoshimine, Noriyuki Gonda, Yuhei Niwa
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Publication number: 20180137331Abstract: A computer-readable medium and an information processing device are provided that are capable of generating collation information that is unlikely to be affected by acquisition conditions of biometric information. An image is acquired (S1), and a base point is determined from the image (S2). Sample information indicating a change in color information of a surrounding area of the base point is acquired (S3). The sample information is information that associates a plurality of samples with center information corresponding to positions on the image of first reference points. The sample is information that associates color information of second reference points with position information of the second reference points. Based on the acquired sample information, frequency information is generated (S4). The frequency information associates the center information with a frequency component of a change in the color information with respect to the position information calculated for each of the first reference points.Type: ApplicationFiled: January 11, 2018Publication date: May 17, 2018Applicant: KABUSHIKI KAISHA DDSInventors: Kenji MIYOSHINO, Kiyohito TOKUDA, Tatsuki YOSHIMINE, Noriyuki GONDA, Yuhei NIWA
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Publication number: 20100246725Abstract: In a selective diversity receiver with two antennas, the strength of the signal received by each antenna is measured at a present and a past time, the difference between the present strengths of the signals received by the two antennas is calculated, and the difference between the present and past strengths of the signal received by each antenna is calculated. If the difference between the present strengths of the two signals is not too large, the signal with the smaller past-to-present strength difference and accordingly with less fading is selected for further reception. In a portable electronic device, this antenna switching strategy reduces susceptibility to human body interference. The present and past strengths can be measured during the preambles of different packets to avoid switching antennas during data reception.Type: ApplicationFiled: January 22, 2010Publication date: September 30, 2010Applicant: OKI ELECTRIC INDUSTRY CO., LTD.Inventors: Kazunori Okuyama, Hideo Tsutsui, Kiyohito Tokuda
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Patent number: 6766172Abstract: A road vehicle communication method allows bothway communication to be held between a mobile station, which sends a request for an information service and receives it, and a central base station and local base stations located at a roadside for sending the information service to the mobile station. The central base station and the local base stations use optical fibers in part of the transmission path thereof for the bothway communication and perform at least one of electric-to-optical conversion and optical-to-electric conversion. The mobile station is caused to send the request for an information service beforehand. In response to the request, the local base station covering the mobile station expected to receive the information service is estimated. When the mobile station lies in a service area to which the local base station estimated is assigned, a control station is caused to provide the mobile station with information corresponding to the information service requested.Type: GrantFiled: September 19, 2000Date of Patent: July 20, 2004Assignees: Oki Electric Industry Co., Ltd., Communications Research Laboratory, Ministry of Posts and Telecommunications, Matsushita Communication Industrial Co., Ltd.Inventors: Kiyohito Tokuda, Kinya Asano, Masayuki Fujise, Fumihide Kojima, Masahiro Watanabe, Ryobun Tachita
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Patent number: 6496534Abstract: A code division multiple access receiver estimates symbol values transmitted by different stations by despreading a combined received signal, weights the estimated symbol values by use of weighting factors calculated for the different stations, respreads the weighted symbol values to estimate the interference due to each station, and subtracts the estimated interference from the received signal to produce a residual signal. The weighting factors can be calculated from the residual signal; the weighting factors are calculated so as to minimize the power of the residual signal. The weighting factors are adjusted at certain intervals, preferably at intervals determined from the rate of fading of the received signal.Type: GrantFiled: June 27, 1997Date of Patent: December 17, 2002Assignee: Oki Electronic Industry Co., Ltd.Inventors: Satoru Shimizu, Eiichiro Kawakami, Kiyohito Tokuda
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Patent number: 6389081Abstract: The signal transmission equipment is comprised such that a signal point does not cross the origin of the constellation by selecting signals to be input to the QPSK modulator, and the positions of the signal points in the constellation.Type: GrantFiled: December 22, 1999Date of Patent: May 14, 2002Assignee: Oki Electric Industry CO, Ltd.Inventors: Satoru Shimizu, Eiichiro Kawakami, Atsuhiko Sugitani, Kiyohito Tokuda
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Patent number: 5243686Abstract: Features are extracted from a sampled input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selected using information entropy values representing the information content of the residuals of the second linear predictive analyses. One or more optimum second orders q are selected on the basis of changes in these information entropy values. The optimum first and second orders are output as features. Further linear predictive analyses can be carried out to obtain higher-order features. Useful features are obtained even for nonstationary input signals.Type: GrantFiled: April 20, 1992Date of Patent: September 7, 1993Assignee: Oki Electric Industry Co., Ltd.Inventors: Kiyohito Tokuda, Atsushi Fukasawa, Satoru Shimizu, Yumi Takizawa
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Patent number: 5239623Abstract: A three-dimensional image generator generates a random signal which it filters in two dimensions generate a realistic three-dimensional image of a natural object such as ocean waves or clouds. By performing the filtering operation repeatedly on overlapping intervals of the random signal, related images can be obtained to generate moving scenes at real-time rates. Two or more partial image generators can be connected in parallel to generate different directions of motion, or different parts of a complex scene. Within each partial image generator, two or more space filters can be connected in parallel to generate superimposed patterns, such as small ripples superimposed on large waves. This image generator is much faster than previous, fractal image generators.Type: GrantFiled: October 20, 1989Date of Patent: August 24, 1993Assignee: Oki Electric Industry Co., Ltd.Inventors: Takuro Sato, Manabu Kawabe, Toshio Kato, Kiyohito Tokuda
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Patent number: 5142581Abstract: Features are extracted from a sample input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selected using information entropy values representing the information content of the residuals of the second linear predictive analyses. One or more optimum second orders q are selected on the basis of changes in these information entropy values. The optimum first and second orders are output as features. Further linear predictive analyses can be carried out to obtain higher-order features. Useful features are obtained even for nonstationary input signals.Type: GrantFiled: December 8, 1989Date of Patent: August 25, 1992Assignee: Oki Electric Industry Co., Ltd.Inventors: Kiyohito Tokuda, Atsushi Fukasawa, Satoru Shimizu, Yumi Takizawa