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公开(公告)号：US20250054208A1
公开(公告)日：2025-02-13
申请号：US18926835
申请日：2024-10-25
Applicant: NEC Corporation
Inventor： Yoshimasa ONO , Shigeru NAKAMURA , Atsufumi SHIBAYAMA , Junichi ABE
Abstract: Provided is a processing apparatus capable of obtaining a 2D image from 3D tomographic images, extracting an image for accurate authentication, and extracting an image at a high speed. A processing apparatus includes: means for calculating, from three-dimensional luminance data indicating an authentication target, depth dependence of striped pattern sharpness in a plurality of regions on a plane perpendicular to a depth direction of the target; means for calculating a depth at which the striped pattern sharpness is the greatest in the depth dependence of striped pattern sharpness; rough adjustment means for correcting the calculated depth on the basis of depths of other regions positioned respectively around the plurality of regions; fine adjustment means for selecting a depth closest to the corrected depth and at which the striped pattern sharpness is at an extreme; and means for extracting an image with a luminance on the basis of the selected depth.
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公开(公告)号：US20210072383A1
公开(公告)日：2021-03-11
申请号：US16772346
申请日：2017-12-15
Applicant: NEC CORPORATION
Inventor： Hidemi NOGUCHI , Junichi ABE
Abstract: A distance-measuring apparatus (2000) generates transmission light by generating a distance measurement signal, and subjecting an optical carrier wave to quadrature modulation on the basis of the generated distance measurement signal. The distance-measuring apparatus (2001) outputs transmission light, and receives reflected light generated by reflecting the transmission light on an object (10) to be measured. The distance-measuring apparatus (2000) compares the received reflected light with reference light to compute a distance from the distance-measuring apparatus (2000) to the object (10) to be measured.
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公开(公告)号：US20170373704A1
公开(公告)日：2017-12-28
申请号：US15544299
申请日：2016-01-20
Applicant: NEC Corporation
Inventor： Tatsuya NAKAMURA , Emmanuel LE TAILLANDIER DE GABORY , Junichi ABE
IPC: H03M13/23 , H04B10/516 , H04J11/00
CPC classification number: H03M13/23 , H03M13/256 , H04B10/516 , H04J11/00
Abstract: If a configuration is employed in which modulation schemes used for an optical communication system can be switched depending on transmission conditions, it is difficult to make effective utilization of frequency resources without the power consumption increasing and the control becoming complex; therefore, an optical transmitter according to an exemplary aspect of the present invention includes an interface means for converting a digital signal to be transmitted under a predetermined transmission condition over an optical carrier wave into a parallel signal with a predetermined bit number at a predetermined transmission rate, and outputting the parallel signal; an encoding means for encoding the parallel signal using one coding system from among a plurality of convolutional coding systems with different degrees of redundancy; a mapping means for mapping an output bit signal output from the encoding means to a modulation symbol; an optical modulation means for modulating the optical carrier wave based on a symbol signal output from the mapping means; and an encoding control means for selecting a predetermined coding system corresponding to the predetermined transmission condition from among the plurality of convolutional coding systems and controlling the interface means, the encoding means, the mapping means, and the optical modulation means in such a way as to operate in accordance with the predetermined coding system.
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4.发明申请EQUALIZATION PROCESSING CIRCUIT, DIGITAL RECEIVER, SIGNAL TRANSMITTING/RECEIVING SYSTEM, EQUALIZATION PROCESSING METHOD, AND DIGITAL RECEIVING METHOD 审中-公开均衡处理电路，数字接收机，信号发送/接收系统，均衡处理方法和数字接收方法
公开(公告)号：US20160308579A1
公开(公告)日：2016-10-20
申请号：US15101995
申请日：2014-11-19
Applicant: NEC CORPORATION
Inventor： Junichi ABE
CPC classification number: H04B3/06 , H04B1/0475 , H04B10/2507 , H04B10/616 , H04B2001/0491
Abstract: It is made possible to compensate for a waveform distortion having semi-fixed characteristics and a waveform distortion varying at high speed with a high degree of accuracy.An equalization processing circuit according to an exemplary aspect of the present invention includes frequency domain equalization means for performing a frequency domain equalization on a digital signal using an inputted frequency domain equalization coefficient; time domain equalization means for performing a time domain equalization on a digital signal using an inputted time domain equalization coefficient; waveform distortion detection means for detecting a dynamic waveform distortion and a quasi-static waveform distortion of an equalized digital signal on which the equalization to be performed; frequency domain equalization coefficient control means for calculating a frequency domain equalization coefficient based on a quasi-static waveform distortion; and time domain equalization coefficient control means for calculating a time domain equalization coefficient based on a dynamic waveform distortion.
Abstract translation: 根据本发明的示例性方面的均衡处理电路包括频域均衡装置，用于使用输入的频域均衡系数对数字信号进行频域均衡; 时域均衡装置，用于使用输入的时域均衡系数对数字信号执行时域均衡; 波形失真检测装置，用于检测要执行均衡的均衡数字信号的动态波形失真和准静态波形失真; 频域均衡系数控制装置，用于基于准静态波形失真来计算频域均衡系数; 以及用于基于动态波形失真来计算时域均衡系数的时域均衡系数控制装置。
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5.发明申请DIGITAL SIGNAL PROCESSING DEVICE, RECEIVING DEVICE, AND SIGNAL TRANSMITTING AND RECEIVING SYSTEM 有权数字信号处理装置，接收装置和信号发送和接收系统
公开(公告)号：US20150333783A1
公开(公告)日：2015-11-19
申请号：US14381223
申请日：2013-01-10
Applicant: NEC Corporation
Inventor： Junichi ABE
CPC classification number: H04B1/1027 , H03H17/0213 , H03H21/0027 , H03H2021/0092 , H04B1/123 , H04L27/10 , H04L27/265
Abstract: A Fourier transform unit (111) performs Fourier transform on a digital signal on a time axis to generate a frequency domain signal which is a signal on a frequency axis. A filter unit (113) equalizes the frequency domain signal in a frequency domain using N first coefficients. An inverse Fourier transform unit (112) performs inverse Fourier transform on the frequency domain signal processed by the filter unit (113) and returns the frequency domain signal to the digital signal on the time axis. That is, the Fourier transform unit (111), the inverse Fourier transform unit (112), and the filter unit (113) compensate for waveform distortion included in the digital signal using an equalization process (that is, frequency-domain equalization (FDE)) in the frequency domain. A first coefficient setting unit (114) sets N first coefficients used by the filter unit (113) using m (provided N>m) second coefficients.
Abstract translation: 傅立叶变换单元（111）对时间轴上的数字信号进行傅立叶变换，生成频域上的信号的频域信号。 滤波器单元（113）使用N个第一系数来均衡频域中的频域信号。 逆傅立叶变换单元（112）对由滤波器单元（113）处理的频域信号进行傅立叶逆变换，并将频域信号在时间轴上返回到数字信号。 也就是说，傅立叶变换单元（111），逆傅里叶变换单元（112）和滤波器单元（113）使用均衡处理（即，频域均衡（FDE））来补偿包括在数字信号中的波形失真 ））。 第一系数设置单元（114）使用m（提供的N> m）个第二系数来设置由滤波器单元（113）使用的N个第一系数。
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公开(公告)号：US20230375709A1
公开(公告)日：2023-11-23
申请号：US17912945
申请日：2020-03-31
Applicant: NEC Corporation
Inventor： Akira TSUJI , Yoshimasa ONO , Junichi ABE , Jiro ABE
CPC classification number: G01S17/89 , G01S7/4808
Abstract: A detection device (10) according to the present disclosure includes an acquisition unit (11) that acquires point cloud data indicating a distance from a measurement device to an object and luminance information obtained from reflected light of a beam emitted when the point cloud data is measured, an edge detection unit (12) that performs edge detection based on the luminance information, and a crack determination unit (13) that determines whether an area indicates a crack by using a shape of the area in which, of a plurality of points indicated by the point cloud data, points having luminance within a predetermined range of difference from luminance of a point detected as an edge are distributed.
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公开(公告)号：US20230119734A1
公开(公告)日：2023-04-20
申请号：US18084814
申请日：2022-12-20
Applicant: NEC Corporation
Inventor： Daisaku OGASAHARA , Junichi ABE
IPC: H04B10/61 , H04L27/26 , H04B10/079
Abstract: When a frequency deviation compensation amount is compensated for by use of frequency shift, a phase offset occurs between adjacent input blocks included in a plurality of input blocks as divided, with the result that an error occurs in a reconstructed bit sequence. A frequency deviation compensation system of the invention is characterized by comprising: a frequency deviation compensation means for compensating for a frequency deviation occurring in a signal by use of frequency shift; and a phase offset compensation means for compensating for a phase offset occurring, in the signal, due to the frequency shift.
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公开(公告)号：US20230036969A1
公开(公告)日：2023-02-02
申请号：US17778496
申请日：2019-11-29
Applicant: NEC Corporation
Inventor： Jiro ABE , Akira TSUJI , Junichi ABE , Yoshimasa ONO
Abstract: An object is to provide a measurement apparatus adapted to correctly integrate three-dimensional data acquired at a plurality of points. A measurement apparatus (10) according to the present disclosure includes a position specifying unit (11) configured to specify, using an apparatus reference coordinate system having a position of the measurement apparatus set as a reference, a position of each of a plurality of other measurement apparatuses; a candidate specifying unit (12) configured to extract at least three measurement apparatuses out of the measurement apparatus and the plurality of the other measurement apparatuses and to specify, based on the positions of the extracted measurement apparatuses, a candidate region that serves as a candidate of a common region referred to in performing alignment of data captured by the measurement apparatus and the plurality of the other measurement apparatuses; and a common region determining unit (13) configured to determine the common region based on the distribution of the plurality of the candidate regions obtained by changing combinations of the measurement apparatuses to be extracted.
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公开(公告)号：US20220343628A1
公开(公告)日：2022-10-27
申请号：US17637132
申请日：2019-08-28
Applicant: NEC Corporation
Inventor： Yoshimasa ONO , Akira TSUJI , Junichi ABE
IPC: G06V10/764 , G06V10/762
Abstract: A processing apparatus (10) includes classification means (12) for classifying three-dimensional point group data acquired based on a reflected light from a structure to be inspected illuminated by light into clusters, which are units of a shape that corresponds to the structure to be inspected, based on positional information at each point of the data; and cluster association means (13) for determining whether a first cluster and a second cluster included in the classified clusters correspond to one structure to be inspected based on a positional relation between the classified clusters.
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公开(公告)号：US20220166534A1
公开(公告)日：2022-05-26
申请号：US17440420
申请日：2020-02-04
Applicant: NEC Corporation
Inventor： Hidemi NOGUCHI , Junichi ABE , Masaki SATO
IPC: H04J14/02 , H04B10/2507 , H04B10/61 , H04B10/50
Abstract: To suppress the deterioration of the characteristics of a MIMO equalizer as well as minimizing an increase in circuit size in spite of the occurrence of signal spectrum narrowing and asymmetric spectrum degradation, a wavelength-division multiplexing optical transmission system (10) according to an embodiment includes a transmitter (1) that generates one channel signal by wavelength-division multiplexing a plurality of subcarrier signals so as to overlap each other and transmits the channel signal, and a receiver (2) that separates a received channel signal into subcarrier signals, and performs equalization using an MIMO equalizer (3) including a FDE-MIMO equalizer (4) and a TDE-MIMO equalizer (5) on each of the separated subcarrier signals.
