Patent application number | Description | Published |
20110129041 | RECEIVER DEVICE, COMMUNICATION SYSTEM AND RECEIVING METHOD - A receiver device receives a signal inputted to one or a plurality of ports as a plurality of received signals, and includes: a phase offset estimating unit that, on the basis of a unique word of each signal block contained in said received signal, estimates the phase offset, and a phase offset compensating unit that, on the basis of a phase offset estimated by said phase offset estimating unit, compensates the phase offset; the receiver device uses a known signal component (unique word) contained in a frequency-domain equalized signal to compensate the phase offset, whereby it compensates complex phase offset fluctuation, and estimates the phase offset of a signal obtained at each port. | 06-02-2011 |
20120070159 | SIGNAL GENERATING CIRCUIT, OPTICAL SIGNAL TRANSMITTING APPARATUS, SIGNAL RECEIVING CIRCUIT, METHOD FOR ESTABLISHING OPTICAL SIGNAL SYNCHRONIZATION, AND OPTICAL SIGNAL SYNCHRONIZATION SYSTEM - To enable signal position detection, frequency offset compensation, clock offset compensation, and chromatic dispersion amount estimation in a communication system based on coherent detection using an optical signal, even on a signal having a great offset in an arrival time depending on a frequency due to chromatic dispersion. An optical signal transmitting apparatus generates specific frequency band signals having power concentrated on two or more specific frequencies and transmits a signal including the specific frequency band signals. An optical signal receiving apparatus converts a received signal into a digital signal, detects positions of the specific frequency band signals from the converted digital signal, estimates frequency positions of the detected specific frequency band signals, and detects a frequency offset between an optical signal receiving apparatus and an optical signal transmitting apparatus. Moreover, the optical signal receiving apparatus detects a clock offset between the optical signal receiving apparatus and the optical signal transmitting apparatus from an interval between the estimated frequency positions of the specific frequency band signals. Furthermore, the optical signal receiving apparatus estimates temporal positions of the detected specific frequency band signals and detects a chromatic dispersion amount from a difference between the temporal positions of the specific frequency band signals corresponding to different frequencies. | 03-22-2012 |
20120099864 | CHROMATIC DISPERSION VALUE CALCULATING APPARATUS, OPTICAL SIGNAL RECEIVING APPARATUS, OPTICAL SIGNAL TRANSMITTING APPARATUS, AND CHROMATIC DISPERSION VALUE CALCULATION METHOD - In order to compensate for chromatic dispersion caused by optical fiber transmission in a communication system with coherent detection using optical signals, specific frequency band signals are used to enable estimation of a chromatic dispersion value. The chromatic dispersion value calculating apparatus is provided with: a signal distributing circuit which distributes, into a plurality of signal sequences, an electrical digital signal converted from received optical signals of an optical signal transmitted by an optical signal transmitting apparatus, in which a known signal with concentrated frequency components of a plurality of specific frequencies is appended to a signal generated from a transmission data sequence; a plurality of frequency band pass filter circuits, each of which separating only each of a plurality of specific frequency components in which the known signal is included from each of the signal sequences distributed by the signal distributing circuit, and passing each of the specific frequency components therethrough; a plurality of power calculating circuits which are provided so as to correspond respectively to the plurality of frequency band pass filter circuits and which calculate power values of signals output from the corresponding frequency band pass filter circuits; a delay time calculating circuit which detects times at which power has the maximum value or times at which the power exceeds a predetermined threshold value, respectively from signal sequences of the power values output from the plurality of power calculating circuits, and which compares the detected times; and a chromatic dispersion value calculating circuit which calculates a chromatic dispersion value based on a comparison result of the times by the delay time calculating circuit. | 04-26-2012 |
20120106618 | METHOD FOR RECEIVING FREQUENCY DOMAIN MULTIPLEXED SIGNAL AND DEVICE FOR RECEIVING FREQUENCY DOMAIN MULTIPLEXED SIGNAL - A frequency domain multiplexed signal receiving method which decodes received signals that are multiplexed in a frequency domain, includes: a digital signal acquisition step of acquiring digital signals from the received signals that are multiplexed in the frequency domain; an offset discrete Fourier transform step of applying an offset discrete Fourier transform to odd discrete point numbers based on the acquired digital signals; and a decode step of decoding frequency domain digital signals in the frequency domain obtained by the offset discrete Fourier transform, and that are the frequency domain digital signals of one or more frequency channels. | 05-03-2012 |
20120315043 | TRANSMISSION METHOD, RECEPTION METHOD, TRANSMITTER APPARATUS, AND RECEIVER DEVICE - A polarization state of a transmission signal can be changed at a high speed based on a symbol-rate By switching a first switch, a second switch, and a third switch with time, one of an X-polarized wave_I-signal as a Y-polarized wave_I-signal, a signal caused by performing logical inversion for an X-polarized wave_I-signal, an X-polarized wave_Q-signal and a signal caused by logical inversion for an X-polarized wave_Q-signal is input to a second modulator. Further, by switching the first switch, the second switch and the third switch with time, the second modulator is input one of the X-polarized wave_I-signal as the Y-polarized wave_Q-signal, the X-polarized wave_I-signal, the signal caused by performing logical inversion for the X-polarized wave_I-signal, the X-polarized wave_Q-signal and the signal caused by performing logical inversion for the X-polarized wave_Q-signal. Thereby, a polarization state of a transmission signal can be changed at high speed based on a symbol-rate speed. | 12-13-2012 |
20130028595 | FREQUENCY OFFSET ESTIMATING METHOD AND FREQUENCY OFFSET ESTIMATING APPARATUS - When a circuit that calculates a frequency offset using a shape of a frequency spectrum is implemented by hardware, the circuit size can be reduced. A frequency offset estimating method for estimating the difference between a carrier frequency of a reception signal and the frequency of an output signal of a local oscillator includes performing a discrete Fourier transform on a reception signal previously sampled at a predetermined sampling frequency and outputting a frequency spectrum with a plurality of frequency components, calculating an average power of the frequency spectrum, calculating a threshold by adding a predetermined value to the average power or power obtained by multiplying the average power by a constant, performing 1-bit quantization on powers of the frequency components of the frequency spectrum based on the threshold, and calculating a centroid frequency by multiplying frequencies of the frequency components by powers of 1-bit quantized frequency components, calculating the sum of multiplied products, and dividing the sum of the products by the sum of the powers of the 1-bit quantized frequency components of the frequency spectrum. | 01-31-2013 |
20130039205 | WIRELESS COMMUNICATION METHOD, BASE STATION, WIRELESS COMMUNICATION SYSTEM, AND COMMUNICATION APPARATUS - Provided are a wireless communication method, a base station, a wireless communication system and a communication apparatus whereby an interference power is calculated from an estimated propagation channel estimation result and the transmission power is controlled based on the interference power or the interference is suppressed by controlling the directivity, thereby increasing the transmission capacity. A propagation channel estimation circuit performs propagation channel estimation from a response signal transmitted from a terminal station and estimates a propagation channel estimation result. An interference power calculation circuit measures each interference power from a signal of each sub-carrier received by each of wireless units, and calculates an interference power for each sub-carrier from the propagation channel estimation result estimated by the propagation channel estimation circuit. When the calculated interference power is equal to or more than a predetermined threshold, an interference suppression signal generation circuit changes the transmission power and generates an interference suppression signal. | 02-14-2013 |
20130070874 | FREQUENCY OFFSET ESTIMATION APPARATUS, FREQUENCY OFFSET ESTIMATION METHOD, AND RECEPTION METHOD - Provided is a frequency offset estimation apparatus that appropriately estimates and compensates for a frequency offset of a received signal when estimating the frequency offset which is the difference between a carrier frequency of the received signal and the frequency of an output signal of a local oscillator. The frequency offset estimation apparatus converts the received signal sampled in advance with a predetermined sampling frequency into a frequency spectrum having N frequency components, limits a frequency band of negative frequency components from 1 to N/2 of the frequency spectrum and a frequency band of positive frequency components from N/2+1 to N of the frequency spectrum, calculates the sum of the squares of the positive frequency components of the frequency spectrum that have been subjected to frequency band limitation and the sum of the squares of the negative frequency components of the frequency spectrum that have been subjected to frequency band limitation to calculate power of the positive frequency components and power of the negative frequency components, and cyclically shifts all frequency components of the frequency spectrum in a frequency domain until the absolute value of a power difference between the power of the positive frequency components and the power of the negative frequency components is less than or equal to a predetermined threshold value, and estimates the frequency offset based on a shift amount until the absolute value is less than or equal to the threshold value. | 03-21-2013 |
20130208619 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - Communication quality is prevented from being deteriorated due to interference caused by low accuracy of channel information or interference from another base station or another wireless communication system. A wireless communication system includes a first wireless station including a plurality of antenna elements, transmission units corresponding to the plurality of antenna elements, and a transmission directivity control unit that controls transmission directivity of the plurality of antenna elements, and a plurality of second wireless stations each including a reception power measurement unit that measures a reception power. The transmission directivity control unit determines the transmission directivity of each of the plurality of antenna elements so that a signal does not reach a particular second wireless station among the plurality of second wireless stations. The transmission units generate wireless signals using the transmission directivity. The plurality of antenna elements transmit the generated wireless signals. The reception power measurement unit measures the reception power in a period that is set so that a signal does not reach the particular second wireless station, and detect the presence or absence of interference. | 08-15-2013 |
20150036634 | WIRELESS COMMUNICATION METHOD, BASE STATION, WIRELESS COMMUNICATION SYSTEM, AND COMMUNICATION APPARATUS - Provided are a wireless communication method, a base station, a wireless communication system and a communication apparatus whereby an interference power is calculated from an estimated propagation channel estimation result and the transmission power is controlled based on the interference power or the interference is suppressed by controlling the directivity, thereby increasing the transmission capacity. A propagation channel estimation circuit performs propagation channel estimation from a response signal transmitted from a terminal station and estimates a propagation channel estimation result. An interference power calculation circuit measures each interference power from a signal of each sub-carrier received by each of wireless units, and calculates an interference power for each sub-carrier from the propagation channel estimation result estimated by the propagation channel estimation circuit. When the calculated interference power is equal to or more than a predetermined threshold, an interference suppression signal generation circuit changes the transmission power and generates an interference suppression signal. | 02-05-2015 |
20150078762 | SIGNAL GENERATING CIRCUIT, OPTICAL SIGNAL TRANSMITTING APPARATUS, SIGNAL RECEIVING CIRCUIT, METHOD FOR ESTABLISHING OPTICAL SIGNAL SYNCHRONIZATION, AND OPTICAL SIGNAL SYNCHRONIZATION SYSTEM - To enable signal position detection, frequency offset compensation, clock offset compensation, and chromatic dispersion amount estimation in a communication system based on coherent detection using an optical signal, even on a signal having a great offset in an arrival time depending on a frequency due to chromatic dispersion. An optical signal transmitting apparatus generates specific frequency band signals having power concentrated on two or more specific frequencies and transmits a signal including the specific frequency band signals. An optical signal receiving apparatus converts a received signal into a digital signal, detects positions of the specific frequency band signals from the converted digital signal, estimates frequency positions of the detected specific frequency band signals, and detects a frequency offset between an optical signal receiving apparatus and an optical signal transmitting apparatus. Moreover, the optical signal receiving apparatus detects a clock offset between the optical signal receiving apparatus and the optical signal transmitting apparatus from an interval between the estimated frequency positions of the specific frequency band signals. Furthermore, the optical signal receiving apparatus estimates temporal positions of the detected specific frequency band signals and detects a chromatic dispersion amount from a difference between the temporal positions of the specific frequency band signals corresponding to different frequencies. | 03-19-2015 |
20150078765 | SIGNAL GENERATING CIRCUIT, OPTICAL SIGNAL TRANSMITTING APPARATUS, SIGNAL RECEIVING CIRCUIT, METHOD FOR ESTABLISHING OPTICAL SIGNAL SYNCHRONIZATION, AND OPTICAL SIGNAL SYNCHRONIZATION SYSTEM - To enable signal position detection, frequency offset compensation, clock offset compensation, and chromatic dispersion amount estimation in a communication system based on coherent detection using an optical signal, even on a signal having a great offset in an arrival time depending on a frequency due to chromatic dispersion. An optical signal transmitting apparatus generates specific frequency band signals having power concentrated on two or more specific frequencies and transmits a signal including the specific frequency band signals. An optical signal receiving apparatus converts a received signal into a digital signal, detects positions of the specific frequency band signals from the converted digital signal, estimates frequency positions of the detected specific frequency band signals, and detects a frequency offset between an optical signal receiving apparatus and an optical signal transmitting apparatus. Moreover, the optical signal receiving apparatus detects a clock offset between the optical signal receiving apparatus and the optical signal transmitting apparatus from an interval between the estimated frequency positions of the specific frequency band signals. Furthermore, the optical signal receiving apparatus estimates temporal positions of the detected specific frequency band signals and detects a chromatic dispersion amount from a difference between the temporal positions of the specific frequency band signals corresponding to different frequencies. | 03-19-2015 |
20150289142 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus is provided that is capable of performing setting of a wireless LAN access point so that frequency utilization efficiency of an entire wireless communication system that includes wireless LAN access points of different manufacturers and different model numbers is improved. A wireless communication system which performs setting necessary for a wireless LAN access point constituting a wireless communication network to operate includes: an information collection unit which collects setting information set in the wireless LAN access point and wireless environment information in the wireless LAN access point, a parameter calculation unit which obtains a parameter to be set for the wireless LAN access point, which is a collection source, based on the collected setting information and the collected wireless environment information, and a parameter setting unit which transmits the obtained parameter to the wireless LAN access point, which is a collection source, over a network and performs setting of the parameter. | 10-08-2015 |
Patent application number | Description | Published |
20100014001 | Simple next search position selection for motion estimation iterative search - A next position selector for motion estimation iterative search improves the efficiency and quality of the integer-pel motion estimation iterative search by easily and quickly determining the center point of the next search area. By taking a position of the SAD value of the present search area and mapping that position to a center point of the next search area, the process of determining the next search area is very efficient. A local minimum avoidance scheme improves avoids being trapped in a local minimum. By remembering the previous position/direction, the search is able to continue in the correct direction to ensure that the search continues without a back and forth search that is trapped in a local minimum. Applications of this improved motion estimation search include stabilizing an image as well as many other applications where motion vectors are used. | 01-21-2010 |
20100014588 | Speculative start point selection for motion estimation iterative search - A speculative start point selection for motion estimation iterative search improves the efficiency and quality of the integer-pel motion estimation iterative search by speculatively selecting the start position of the iteration. The start position is selected by comparing the Sum of Absolute Differences (SAD) value of a 0 motion vector, a predicted motion vector and a global motion vector (GMV) and selecting the position with the smallest SAD value. A refinement scheme with a threshold improves the efficiency and quality of the motion estimation iterative search by performing several comparisons to ensure the proper motion vector is selected. Applications of this improved motion estimation search include stabilizing an image as well as many other applications where motion vectors are used. | 01-21-2010 |
20100014765 | Motion vector detecting device, motion vector detecting method, image encoding device, and program - A motion vector detecting device includes: a motion predicting and compensating means for calculating cost values of a plurality of motion vectors, which is candidates of an optimal motion vector, with a first pixel precision every prediction mode and calculating the optimal motion vector with a second pixel precision and a cost value of the optimal motion vector with the second pixel precision on the basis of a gradient of the cost values. | 01-21-2010 |
20100020881 | Motion vector detecting device, motion vector detecting method, image encoding device, and program - A motion vector detecting device includes: a motion predicting and compensating circuit calculating cost values of a plurality of motion vectors, which is candidates of an optimal motion vector, using a cost function indicating an encoding efficiency with a first pixel precision every prediction mode and calculating the optimal motion vector with a second pixel precision and the cost value of the optimal motion vector with the second pixel precision using a profile of the cost values with the first pixel precision. | 01-28-2010 |
20110150092 | EMULATION OF BI PREDICTED PICTURES USING ADJACENT PICTURES FOR IMPROVED VIDEO - A method and apparatus for emulation of Bi predicted B pictures is described where a B picture is constructed only from information from one preceding and successive frame without pixel averaging or motion vector computation. In the case of H.264 or analogous codecs, a top field of a B picture is formed from the successive I or P picture top field, and the bottom field formed from the previous P picture bottom field. B picture emulation may reverse the previous and successive pictures. For interlaced pictures, the odd and ever interlacing fields are treated as top and bottom fields, and also use information from both one preceding and successive frame. The resulting Bi predicted B pictures reduce inter-GOP flicker. | 06-23-2011 |
20110222836 | VIDEO EDITING WITH A PC DATA LINKED TO A VIDEO CAPTURE DEVICE - A personal computer with a graphical user interface is connected through a data link to an image capture device whereupon one or more images are stored. The image capture device comprises specialized graphical or video hardware, which may be controlled by the graphical user interface through signals passed through the data link. In response to those signals, the image capture device then processes one or more selected images or groups of pictures with the stored images, thereby performing one or more editing functions. By using the specialized hardware and capacious storage typically present on the image capture device, only low capability personal computers are required. Depending on the screen size and hardware capabilities of the image capture device, the personal computer may comprise a sufficient screen sized netbook, laptop, desktop computer, smart phone, MP3 player, or other personal digital assistant (PDA). | 09-15-2011 |
Patent application number | Description | Published |
20080231192 | ELECTRON BEAM DRAWING APPARATUS - An electron beam drawing apparatus, comprises an electrostatic deflector which deflects the electron beam by an electric field, a coaxial cable which is connected to deflecting electrodes, and a resistive element which is connected between a central conductor and an outer conductor or the external cylinder. The electrostatic deflector includes the external cylinder provided more downstream than the electron source and kept at the ground potential and a plurality of deflecting electrodes which are provided in the external cylinder. The coaxial cable includes the central conductor and the tubular outer conductor, one end of the central conductor passing through the external cylinder and being connected to the deflecting electrodes and one end of the outer conductor being connected to the external cylinder. The resistive element is set to a resistance for obtaining impedance matching with the coaxial cable. | 09-25-2008 |
20120118853 | MANUFACTURING METHOD OF MASTER DISK FOR PATTERNED MEDIUM AND MAGNETIC RECORDING DISK MANUFACTURING METHOD - According to one embodiment, a method for manufacturing a master disk for discoid patterned medium having a plurality of sectors arranged in a circumferential direction, the plurality of sectors including a recording data portion and a servo data portion that includes a sector identification region having gaps formed in a linear pattern is provided. An imprint master disk having a linear pattern which is common to the sectors before the gaps are formed in the sector identification region and including at least one pattern of the sector is prepared, imprinting is repeated in the circumferential direction by using the imprint master disk to form patterns of a discoid patterned medium on a substrate, and a sector identification pattern is formed in each sector by forming gaps in the linear pattern of each sector identification region among the patterns formed on the substrate. | 05-17-2012 |
20120235054 | ELECTRON BEAM IRRADIATION APPARATUS AND ELECTRON BEAM DRAWING APPARATUS - According to one embodiment, an electron beam irradiation apparatus comprises an objective lens configured to irradiate a specimen surface with an electron beam, an electron detector which is provided between the objective lens and the specimen surface and which is configured to detect reflected electrons or secondary electrons emitted from the specimen surface, and an antireflection mechanism which is provided between the electron detector and the specimen surface. The antireflection mechanism has a plurality of holes following spiral trajectories of reflected electrons or secondary electrons emitted from the specimen surface and is configured to prevent the reflected electrons or secondary electrons from being re-reflected toward the specimen surface and to direct a part of the reflected electrons or secondary electrons to the electron detector. | 09-20-2012 |
20160071692 | DATA GENERATING APPARATUS, ENERGY BEAM WRITING APPARATUS, AND ENERGY BEAM WRITING METHOD - In one embodiment, a data generating apparatus generates data including an irradiation amount of a beam in each pixel for an energy beam writing apparatus. The data generating apparatus includes a target irradiation amount calculating section configured to calculate a first irradiation amount in each pixel, an irradiation amount rounding section configured to round the first irradiation amount based on an irradiation amount control unit and calculate a second irradiation amount, a difference calculating section configured to calculate a first difference between the first irradiation amount and the second irradiation amount, a difference sum calculating section configured to calculate a sum of the first differences in a first group of a plurality of adjacent pixels, and an allocating section configured to allocate an irradiation amount based on the irradiation amount control unit and the sum to a pixel in the first group. | 03-10-2016 |
Patent application number | Description | Published |
20120278697 | ELECTRONIC APPARATUS, METHOD OF CONTROLLING THE SAME AND PROGRAM - According to one embodiment, an apparatus includes a display including a first display screen, a reception module configured to receive first Web page data, a selection module configured to select a first region which is a part of a first Web page displayed on the first display screen based on the first Web page data, a display module configured to display the first region on the first display screen, and a transmission module configured to transmit first Web page display region data to a second electronic apparatus, the first Web page display region data including an address of the first Web page, position data showing a position of the first region in the first Web page, and a resolution of the first display screen. | 11-01-2012 |
20120278718 | VIDEO DISPLAY APPARATUS, VIDEO DISPLAY MANAGEMENT APPARATUS, VIDEO DISPLAY METHOD AND VIDEO DISPLAY MANAGEMENT METHOD - According to one embodiment, a video display apparatus includes a selection module, a Web information analysis module, a screen generation module, a transmission module, a reception module, and an alteration module. The selection module is configured to select a partial area of a Web page. The Web information analysis module is configured to analyze first Web information which specifies the partial area. The screen generation module is configured to generate a screen for displaying page information of the partial area, based on the first Web information. The transmission module is configured to transmit the first Web information to an external apparatus. | 11-01-2012 |
20120278836 | ELECTRONIC DEVICE AND DISPLAY METHOD - According to one embodiment, an electronic device includes a generator configured to generate key information items associated with the information integration screen information items, a selection module configured to select one information integration screen information item from information integration screen information items based on in-device information and key information items the in-device information includes the electronic program table data acquired from the electronic device, and the key information items associated with the respective information integration screen information items, and a display data generator configured to generate display data to display, on a display screen, an information integration screen includes one or more Web page and/or the specified area of Web page, the information integration screen corresponding to the one information integration screen information selected by the selection module. | 11-01-2012 |
Patent application number | Description | Published |
20140373061 | Method, Device, and Computer Program Product - According to one embodiment, a program listing display method includes: obtaining data of a first program and data of a second program through a communication network; obtaining, though the communication network, first reservation information of the first program and second reservation information of the second program in an electronic device; and outputting data of a program listing containing the data of the first program, the data of the second program, the first reservation information, and the second reservation information. In the data of the program listing, in accordance with newness of the first reservation information or the second reservation information, a display mode of the data of the first program differs from a display mode of the data of the second program, or a display mode of the first reservation information differs from a display mode of the second reservation information. | 12-18-2014 |
20140373067 | Electronic Device, Method, and Computer Program Product - According to one embodiment, an electronic device includes a processing circuitry to make a request to a server so as to acquire a channel list via a communication network, to compare a first channel list acquired newly with a second channel list acquired previously, and, if the second channel list is to be updated with the first channel list, to acquire first program information corresponding to the first channel list from the server, and to generate a program guide by using the first channel list and the first program information. | 12-18-2014 |
20150026725 | ELECTRONIC DEVICE, DISPLAY METHOD, AND COMPUTER PROGRAM PRODUCT - According to one embodiment, an electronic device includes an input controller to designate a plurality of first programs that a user wants to view among a plurality of programs; a processor to execute an application for displaying information on a first program to be broadcast in a first period among the plurality of the first programs, the first period being determined according to a current time; and a display processor to display number of first programs to be broadcast in the first period on a screen for activating the application. | 01-22-2015 |
20160066045 | METHOD, ELECTRONIC DEVICE, AND COMPUTER PROGRAM PRODUCT - According to one embodiment, a method includes: receiving first information and second information by an electronic device, the first information relating to first scenes in a first program and comprising information of one or more goods or services introduced in at least one of the first scenes, the second information relating to second scenes in a second program and comprising information of one or more goods or services introduced in at least one of the second scenes; receiving a first operation to specify a first good or a first service; and displaying information relating to one or more third scenes searched from the first scenes and the second scenes on a display in response to the first operation, the one or more third scenes introducing the specified first good or first service. | 03-03-2016 |