Patents by Inventor Toshiaki Koike

Toshiaki Koike 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).

  • Method and apparatus for detecting symbols received wirelessly using probabilistic data association with uncertainty
    Patent number: 9184876
    Abstract: A method detects symbols in a signal received via a wireless channel by generating a statistical model for each symbol, and determining contribution from all other symbols in the signal as an expected interference. The expected interference is subtracted from the signal to obtain an interference-free signal. Then, the symbol is inferred based on the statistical model and the interference-free signal.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: November 10, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Philip Orlik, Milutin Pajovic, Kyeong Jin Kim, Toshiaki Koike-Akino
  • Printer and printing system
    Patent number: 9156273
    Abstract: Control of a printer involves reading a cartridge identification number from a memory in a cartridge and storing such number, generating status information including such number and may further include a calculated ink usage amount, and sending the status information to a data processing apparatus, which may be a server. In some embodiments, the ink usage amount is calculated as a number of discharged ink shots. The server saves the status information. This or another upstream server can reliably determine the number of ink shots used by the printer only for printing from this status information. Such control is embodied in a program stored on a non-transitory controller-readable medium, which program is executed by a controller in the printer.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: October 13, 2015
    Assignee: Seiko Epson Corporaton
    Inventors: Keigo Ejiri, Toshiaki Koike
  • Label Printer, Control Method for a Label Printer, and Non-Transitory Storage Medium
    Publication number: 20150269399
    Abstract: Writing incorrect information to an IC tag affixed to a label is prevented. When a control command including recording information, an instruction to print the recording information on a label, and an instruction to write data including at least time-related information to an IC tag affixed to the label is received from a host computer, the system controller of a label printer prints the recording information and writes the write data based on time information input from a RTC, but does not print the recording information and write the write data based on the control command if an error was detected by RTC error detector.
    Type: Application
    Filed: June 8, 2015
    Publication date: September 24, 2015
    Inventor: Toshiaki Koike
  • PRINTER, PRINTING METHOD, AND PRINTING SYSTEM
    Publication number: 20150251469
    Abstract: A printer 1 includes a conveyance unit that conveys roll paper stored in a paper feed device; a computing unit 100a that calculates the distance between detection marks of the roll paper conveyed by the conveyance unit; a memory unit 105 that stores a first step count corresponding to the distance between detection marks; a communication interface 106 that receives print data containing start coordinates for rendering image data of images to print in an image buffer; a print control unit 100b that corrects the start coordinates contained in the print data based on the distance between detection marks calculated by the computing unit 100a and a distance between detection marks stored in the memory unit 105; and a print unit that prints based on the print data at start coordinates corrected by the print control unit 100b.
    Type: Application
    Filed: March 6, 2015
    Publication date: September 10, 2015
    Applicant: Seiko Epson Corporation
    Inventors: Takako Kasuga, Yuya Iwasa, Toshiaki Koike, Kiyomi Kuroda
  • Multi-mode interference device
    Patent number: 9116298
    Abstract: A multi-mode interference (MMI) device includes a substrate layer, a core layer grown on the substrate layer for propagating an optical signal, and a cladding layer grown on the core layer for guiding the optical signal. The MMI device also includes a non-uniform pattern of patches forming a non-uniform refractive index distribution within the MMI device.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 25, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Keisuke Kojima, Selman Ozbayat, Toshiaki Koike-Akino, Bingnan Wang, Satoshi Nishikawa, Eiji Yagyu
  • Method and Apparatus for Detecting Symbols Received Wirelessly using Probabilistic Data Association with Uncertainty
    Publication number: 20150236817
    Abstract: A method detects symbols in a signal received via a wireless channel by generating a statistical model for each symbol, and determining contribution from all other symbols in the signal as an expected interference. The expected interference is subtracted from the signal to obtain an interference-free signal. Then, the symbol is inferred based on the statistical model and the interference-free signal.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 20, 2015
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Philip Orlik, Milutin Pajovic, Kyeong Jin Kim, Toshiaki Koike-Akino
  • Method and system for modulating optical signals as high-dimensional lattice constellation points to increase tolerance to noise
    Patent number: 9112653
    Abstract: A method modulates data for optical communication by first encoding the data using a forward error correction (FEC) encoder to produce encoded data, which are encoded using a block encoder to produce block encoded data such that Hamming distances between code words that represent the block encoded data are increased. The block encoded data are mapped to produce mapped data such that Euclidian distances between the constellation points are increased. Then, the mapped data are modulated in a transmitter to a modulated signal for an optical channel.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: August 18, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Toshiaki Koike-Akino, Andrei Kniazev, David S Millar
  • Multi-mode interference device
    Patent number: 9097852
    Abstract: A multi-mode interference (MMI) device includes a substrate layer, a core layer grown on the substrate layer for propagating an optical signal, and a cladding layer grown on the core layer for guiding the optical signal. The MMI device includes a patch with a non-uniform shape formed by an intersection of a plurality of curves forming a non-uniform refractive index distribution within the MMI device. The plurality of curves includes at least one curve with a non-null curvature.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: August 4, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Toshiaki Koike-Akino, Keisuke Kojima, Bingnan Wang, Satoshi Nishikawa, Eiji Yagyu
  • Non-coherent transmission and equalization in doubly-selective MIMO channels
    Patent number: 9088447
    Abstract: A method and system realize reliable wireless communications in non-coherent multiple-input multiple-output (MIMO) doubly-selective channels. The method uses Grassmannian space-time-frequency block codes and an iterative generalized likelihood ratio test (GLRT) with a multi-dimensional basis expansion model (BEM), decision reordering, and a fixed number of surviving candidates. The computational complexity of a non-coherent MIMO equalizer becomes linear as a function of a code length and a size of a modulation alphabet. The codebook, the alphabet size, the bit labeling, and the block power are optimized using worst-case channel statistics or instantaneous channel states. The method can use soft-information feedback from error correction codes, such as low-density-parity-check codes to improve performance.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: July 21, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Toshiaki Koike-Akino, Philip Orlik
  • Media processing device, control method of a media processing device, and storage medium
    Patent number: 9082028
    Abstract: Writing incorrect information to an IC tag affixed to a medium is prevented. When a control command including recording information, an instruction to record the recording information on a medium, and an instruction to write data including at least time-related information to an IC tag affixed to the medium is received from a host computer, the system controller 35 of a media processing device 2 records the recording information and writes the write data based on time information input from a RTC 29, but does not record the recording information and write the write data based on the control command if a RTC 29 error was detected by a RTC error detection unit 36b.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: July 14, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Koike
  • Adaptively coding and modulating signals transmitted via nonlinear channels
    Patent number: 9077508
    Abstract: An adaptive coding scheme for nonlinear channels improves reliability and an efficiency in digital communication networks. The method monitors channel statistics to analyze an extrinsic information transfer chart of the channels. The channel statistics are fed back to the transmitter to adapt forward error correction coding. A parametric analysis method uses a Gaussian mixture model. The statistical information feedback can adapt an ARQ sheme by adding a weighted received signal to the original coded signals to reduce nonlinear distortion. Trellis shaping can make the transmitting signal preferable for nonlinear channels.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: July 7, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Toshiaki Koike-Akino, Kieran Parsons, Chunjie Duan, Keisuke Kojima
  • Compound optical combiner
    Patent number: 9052461
    Abstract: A compound optical combiner for combining multiple optical signals includes a set of combiners. The set of combiners includes at least one polarization combiner optically connected to at least one non-polarization combiner. The non-polarization combiner combines a first set of input signals while preserving a polarization of each input signal in the first set of signals. The polarization combiner combines a second set of input signals while converting the polarization of at least one input signal in the second set of signals.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: June 9, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Keisuke Kojima, Bingnan Wang, Toshiaki Koike-Akino, Satoshi Nishikawa, Eiji Yagyu
  • Recording device, control method of a recording device, and storage medium
    Patent number: 9033601
    Abstract: The cutting control unit 20a of a printer 1 monitors the output value of a notch detection sensor 19 while conveying a recording medium, and calculates a position corresponding to the axis of symmetry of a notch where a cutting unit is to cut based on a starting position and an end position. The starting position is the position of the recording medium at the detection position of the sensor when the sensor output value exceeds a specific threshold. The end position is the position of the recording medium at the detection position when the sensor output value goes below the specific threshold after the starting position is detected.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: May 19, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Koike
  • Media processing device, media processing system, and control method of a media processing device
    Patent number: 9025177
    Abstract: After processing a medium B with a processing unit based on control data received from a host computer 92 and stopping conveyance of the medium B, the media processing device control unit 100 of a printer 1 prohibits processing the medium B by the processing unit, waits until displacement of the medium B is detected by a media orientation detection means 65, and reports starting to wait to the host computer 92. When displacement of the medium B is detected by the media orientation detection means 65 while waiting, the media processing device control unit 100 cuts the medium B with the automatic paper cutter 60, and then cancels prohibition of processing medium B by the processing unit.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: May 5, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Toshiaki Koike, Yuya Iwasa, Takako Kasuga, Kiyomi Kuroda
  • Media processing device, printing device, and control method of a media processing device
    Patent number: 9013530
    Abstract: A printer 1 has a media orientation detection means 65 that detects displacement of the media after conveyance by the conveyance mechanism 63 stops; and a media processing device control unit 100 that controls cutting the media by an automatic paper cutter 60 when the media orientation detection means 65 detects displacement of the media, and controls processing the media by a processing unit when a communication unit receives control data while in a standby mode waiting for detection of media displacement by the media orientation detection means 65.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: April 21, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Toshiaki Koike, Takako Kasuga, Yuya Iwasa, Kiyomi Kuroda
  • Multi-Mode Phase-Shifting Interference Device
    Publication number: 20150086158
    Abstract: A multi-mode interference (MMI) device includes a substrate layer, a core layer deposited on the substrate layer for propagating an optical signal, and a cladding layer deposited on the core layer for guiding the optical signal. The core layer includes a core section suitable for propagating multiple optical signals having different wavelengths. The core section includes a shifting segment for uniquely shifting phases of the multiple optical signals. The shifting segment includes at least one or a combination of sections having different effective refractive index, a tilted segment, a curved section, and waveguides with variations in width, thickness or effective refractive index.
    Type: Application
    Filed: September 26, 2013
    Publication date: March 26, 2015
    Applicants: Mitsubishi Electric Corporation, Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Keisuke Kojima, Thakur Siddharth Singh, Toshiaki Koike-Akino, Satoshi Nishikawa, Bingnan Wang, Eiji Yagyu
  • Printer and Printing System
    Publication number: 20150070416
    Abstract: Control of a printer involves reading a cartridge identification number from a memory in a cartridge and storing such number, generating status information including such number and may further include a calculated ink usage amount, and sending the status information to a data processing apparatus, which may be a server. In some embodiments, the ink usage amount is calculated as a number of discharged ink shots. The server saves the status information. This or another upstream server can reliably determine the number of ink shots used by the printer only for printing from this status information. Such control is embodied in a program stored on a non-transitory controller-readable medium, which program is executed by a controller in the printer.
    Type: Application
    Filed: November 19, 2014
    Publication date: March 12, 2015
    Inventors: Keigo Ejiri, Toshiaki Koike
  • Printer and printer control method for daisy chain connection
    Patent number: 8964209
    Abstract: A printer that receives requests to print on plural different media enables efficient system maintenance and system changes. A printer connected in a daisy chain to a host device or a first printer on one side and to a second printer on the other side has a communication unit that receives print request data from the host device or the first printer, and sends the print request data to the second printer; a print unit that interprets the received print request data and executes a printing control process based on the result of data interpretation; and a response unit that generates individual response data for the printer based on the result of the printing control process, generates unified response data from response data received from the second printer and the individual response data, and sends the unified response data to the host device or the first printer.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: February 24, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Takako Kasuga, Yuya Iwasa, Norio Tsuchiya, Toshiaki Koike
  • Media Processing Device, Media Processing System, and Control Method of a Media Processing Device
    Publication number: 20150036165
    Abstract: After processing a medium B with a processing unit based on control data received from a host computer 92 and stopping conveyance of the medium B, the media processing device control unit 100 of a printer 1 prohibits processing the medium B by the processing unit, waits until displacement of the medium B is detected by a media orientation detection means 65, and reports starting to wait to the host computer 92. When displacement of the medium B is detected by the media orientation detection means 65 while waiting, the media processing device control unit 100 cuts the medium B with the automatic paper cutter 60, and then cancels prohibition of processing medium B by the processing unit.
    Type: Application
    Filed: July 16, 2014
    Publication date: February 5, 2015
    Inventors: Toshiaki Koike, Yuya Iwasa, Takako Kasuga, Kiyomi Kuroda
  • Multi-mode interference manipulator
    Patent number: 8942517
    Abstract: A multi-mode interference includes a core portion suitable, at any point, for propagating an optical signal having multiple spatial modes. The core portion includes a shifting section for shifting phases of the spatial modes of the optical signal.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: January 27, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Keisuke Kojima, Bingnan Wang, Toshiaki Koike-Akino, Wangqing Yuan, Satoshi Nishikawa