Signal Quality (e.g., Timing Jitter, Distortion, Signal-to-noise Ratio) Patents (Class 702/69)
  • Patent number: 10122361
    Abstract: An electronic device includes a transmission interface, a driving circuit, a receiving circuit, a sampling circuit, a detecting circuit, a timing control circuit and a processing circuit. The transmission interface is for connecting to another electronic device via a connecting cable. The driving circuit outputs a backward signal via the transmission interface to the another electronic device. The receiving circuit receives a received signal including the backward signal and a forward signal from the transmission interface. The sampling circuit samples the received signal to obtain a plurality of sample results. The detecting circuit detects transitions of the sample results to obtain a plurality of detection results. The processing circuit generates a control signal according to the detection results, and adjusts a time point at which the driving circuit outputs the backward signal through the timing control circuit.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: November 6, 2018
    Inventors: Wei-Ling Chen, Chun Wen Yeh, Yan-Cheng Lin
  • Patent number: 10090938
    Abstract: For wireless cellular communications, a “smart” multi-band combiner system has a multi-band combiner and a passive inter-modulation (PIM) detection sub-system. The multi-band combiner combines multiple transmit signals in different downlink frequency bands into a single, multi-band transmit signal for transmission from a cell tower antenna. The PIM detection sub-system characterizes the frequency components in the multi-band transmit signal to predict PIM products and determine if any predicted PIM products might interfere with any receive signals in any uplink frequency bands. If so, the PIM detection sub-system generates a signal indicating the presence of such predicted interfering PIM products, and the system installer and/or the network administrator can take remedial action to prevent the PIM products from interfering with user communications.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: October 2, 2018
    Assignee: CommScope Italy, S.r.l.
    Inventors: Sammit A. Patel, Ray K. Butler, John W. Brunner, Xiaohua Hou
  • Patent number: 10068626
    Abstract: A clock timing adjust circuit is incorporated in a clocked integrated circuit to detect an input clock frequency and to adjust the timing latency of an internal control signal for accessing a memory element in the clocked integrated circuit. The clock timing adjust circuit introduces an adjustable timing latency to an internal control signal derived from the command signal. The clock timing adjust circuit operates to adjust the timing latency of the control signal to cause clock based operations to either be advanced or delayed by one or more clock cycles in response to the clock frequency detection. In one embodiment, the clock timing adjust circuit includes a clock frequency detect circuit and a latency adjust circuit. The clock timing adjust circuit can operate at both high and low clock frequencies to ensure that undesired data collision events are obviated without introducing unnecessary delays.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: September 4, 2018
    Assignee: Integrated Silicon Solution, Inc.
    Inventors: Steven Eaton, Matthew Manning
  • Patent number: 9973276
    Abstract: An apparatus includes a receiver configured to receive a signal that has traveled an optical transmission line without returning output from an optical transmitting device and synchronize with the optical transmitting device in order to demodulate the signal; a dispersion compensator configured to compensate for wavelength dispersion caused by transmission of the signal; an acquisition circuit configured to acquire a transmitting timing at which the signal has been transmitted from the optical transmitting device; a calculation circuit configured to calculate a transmission time period from the optical transmitting device to the receiver from the transmitting timing and a receiving timing at which the signal has been received with the receiver; and an amount setting circuit configured to adjust a dispersion compensation amount of the dispersion compensator in accordance with the transmission time period.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: May 15, 2018
    Inventors: Yutaka Kai, Tomoo Takahara, Toshiki Tanaka, Masato Nishihara, Ryou Okabe
  • Patent number: 9955215
    Abstract: The present technology concerns cell phones and other portable devices, and more particularly concerns use of such devices in connection with media content (electronic and physical) and with other systems (e.g., televisions, digital video recorders, and electronic program directories). Some aspects of the technology allow users to easily transfer displayed content from cell phone screens onto a television screens for easier viewing, or vice versa for content portability. Others enable users to participate interactively in entertainment content, such as by submitting plot directions, audio input, character names, etc., yielding more engaging, immersive, user experiences. Still other aspects of the technology involve a program directory database, compiled automatically from information reported by network nodes that watch and identify content traffic passing into (and/or out of) networked computers. By identifying content resident at a number of different repositories (e.g.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: April 24, 2018
    Assignee: Digimarc Corporation
    Inventors: Bruce L. Davis, Tony F. Rodriguez
  • Patent number: 9729199
    Abstract: A method is for processing an analog signal coming from a transmission channel. The analog signal may include a useful signal modulated on a sub-set of carriers. The method may include analog-to-digital converting of the analog signal into a digital signal, and synchronization processing the digital signal. The synchronizing may include determining, in a time domain, a limited number of coefficients of a predictive filter from an autoregressive model of the digital signal, and filtering the digital signal in the time domain by a digital finite impulse response filter with coefficients based upon the limited number of coefficients to provide a filtered digital signal. The method may include detecting of an indication allowing a location in the frame structure to be identified, using the filtered digital signal and a reference signal.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: August 8, 2017
    Inventors: Mark Wallis, Yoann Bouvet, Pierre Demaj
  • Patent number: 9690930
    Abstract: Sequences of discrete events, such as clicks on a website, are evaluated for periodic behavior, a period is calculated, and the sequence is scored to determine the confidence that the sequence really exhibits periodicity. The random variations on the timing of the discrete events due to transmission delays or other factors may be reduced or eliminated from the evaluation. An apparatus for performing the method of evaluation may include a computer programmed to carry out the method.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: June 27, 2017
    Assignee: EMC IP Holding Company LLC
    Inventors: Eugene Gulko, Andreas Wittenstein, Richard Chiles
  • Patent number: 9685173
    Abstract: A system and method for non-intrusive acoustic parameter estimation is included. The method may include receiving, at a computing device, a first speech signal associated with a particular user. The method may include extracting one or more short-term features from the first speech signal. The method may also include determining one or more statistics of each of the one or more short-term features from the first speech signal. The method may further include classifying the one or more statistics as belonging to one or more acoustic parameter classes.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: June 20, 2017
    Assignee: Nuance Communications, Inc.
    Inventors: Dushyant Sharma, Patrick Naylor, Pablo Peso Parada
  • Patent number: 9651705
    Abstract: A first broadband magnetic field is induced at a first transmitter position in a well bore drilled through a formation. A first formation magnetic field induced by the first broadband magnetic field is detected at a first receiver position. A second formation magnetic field induced by the first broadband magnetic field is detected at a second receiver position. A second broadband magnetic field is induced at a second transmitter position in the well bore. A third formation magnetic field induced by the second broadband magnetic field is detected at the first receiver position. A fourth formation magnetic field induced by the second broadband magnetic field is detected at the second receiver position. A formation property is computed using a function of the first, second, third, and fourth formation magnetic fields, wherein the function reduces the effect of a casing on the computation of the formation property.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: May 16, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Dagang Wu, Michael S. Bittar
  • Patent number: 9437203
    Abstract: Provided is a system, method, and computer program product for improving the quality of speech reproduction in wireless applications where the received speech frames are subject to transmission and packet losses. The speech decoding process is dynamically delayed by at least one frame period in order to perform additional error correction and concealment techniques during times when the wireless link quality if below a predetermined threshold. The wireless link is monitored and if the link quality falls below a predetermined threshold, the decoding process is delayed by at least one frame period so that one or more error correcting techniques can be performed to increase the quality of the reconstructed speech.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: September 6, 2016
    Assignee: QOSOUND, INC.
    Inventor: Huan-Yu Su
  • Patent number: 9429603
    Abstract: A method for detecting at least two amplitude-modulated transmitted signals contained in a received signal within the same frequency channel with respectively different frequency displacements, which determines from the received signal a modified received signal by means of a nonlinear signal processing. Following this, the spectrum of the modified received signal is determined by means of Fourier transform, and at least two transmitted signals contained in the received signal are detected if at least two first spectral lines each associated with carrier signals are significantly distinguishable within the determined spectrum from spectral components associated with noise signals and payload signals.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: August 30, 2016
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventor: Thorben Detert
  • Patent number: 9189752
    Abstract: Described is a machine learning system for binary classifications. The system improves interpolation schemes used in isotonic regressions by providing a continuous function that also is monotonic. The system outputs a probability estimating function on a signal space that is both monotonic and varies continuously with the input signals. More specifically, described is an interpolation function that is continuous and piecewise linear on Delaunay simplices. Accordingly, the resulting probability estimation function may more accurately match actual probabilities especially when training data is sparse.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: November 17, 2015
    Assignee: Google Inc.
    Inventor: Thomas Fischbacher
  • Patent number: 9119249
    Abstract: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: August 25, 2015
    Inventors: Hsing-Chien Yang, Wen-Hsin Cheng, Ying-Hao Hsu, Lan-Ting Hsu, Tsung-Hau Chang
  • Patent number: 9074932
    Abstract: An object of the invention is to automatically remove noise out of an input spectrum data while rounding in spectral shape is being suppressed. The spectrum data correction system wherein a noise quantity is detected on the basis of a difference in value between an extremal point of measurement data-blocks making up input spectrum data, and a mean value of measurement data-blocks in the vicinity of the extremal point, and a count of moving-average points of measurement data-blocks subjected to moving average processing is controlled according to the noise quantity, the spectrum data correction system comprises means for using an optical power, detected by a photo-detector of an optical spectrum analyzer, as the measurement data-block, thereby controlling the count of the moving-average points of the measurement data-blocks according to magnitude of a signal level of the measurement data-block.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: July 7, 2015
    Inventors: Manabu Kojima, Gentarou Ishihara
  • Patent number: 9048943
    Abstract: A method is provided for communicating signals at a low power level in an electromagnetic interference (EMI) environment. A first device transmits a modulated signal having a first carrier frequency, including the encoded information via a hardwire transmission medium. In one aspect, the power level of the modulated signal can be adjusted to minimize power consumption or reduce the generation of EMI. The modulated signal may be in one of the following formats: frequency modulation (FM) or phase modulation (PM) to name a few examples. A second device including a logarithmic detector amplifier (LDA) demodulator circuit receives the signal, which may be mixed with EMI. The LDA demodulator circuit amplifies the modulated signal, without amplifying the EMI, to supply a demodulated baseband signal, which may be an n-ary digital signal, or an audio signal. A low-power, noise insensitive communication channel is also provided.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 2, 2015
    Assignee: DockOn AG
    Inventors: Patrick Rada, Forrest Brown
  • Patent number: 9037431
    Abstract: An apparatus for computing a coupling noise voltage occurring in a plurality of cells arranged on a plurality of word lines and a plurality of bit lines in a flash memory device includes: a coupling ratio computing unit and a coupling voltage computing unit. The coupling ratio computing unit can compute coupling ratios between a cell and neighboring cells wherein each of the coupling ratios have a value such that the difference between two coupling noise voltage values is minimized. The coupling voltage computing unit computes the coupling noise voltage value occurring in the cell using the computed coupling ratios.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: May 19, 2015
    Assignee: Foundation of Soongsil—University Industry Cooperation
    Inventors: Jae-Jin Lee, Dong-Hyuk Park
  • Patent number: 9026391
    Abstract: A distortion estimation apparatus for estimating distortion includes a feedback element, a nonlinearity determiner, and a distortion simulator. The feedback element provides a feedback signal derived from a distorted output signal of the distorting element. A signal processing quality of the feedback element is lower than an associated signal property of the distorted output signal. The nonlinearity determiner receives the feedback signal and an input signal to the distorting element or a signal derived from the input signal. The nonlinearity determiner determines an estimated transmission characteristic of the distorting element by relating signal properties of the feedback signal and the input signal or the signal derived from the input signal. The distortion simulator estimates the distortion caused by the distorting element based on the input signal or the signal derived from the input signal and the estimated transmission characteristic.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: May 5, 2015
    Assignee: Intel Mobile Commnications GmbH
    Inventors: Bernhard Sogl, Alexander Belitzer, Andrea Camuffo, Jan-Erik Mueller
  • Patent number: 9014996
    Abstract: A system to aggregate, filter, and share energy data for analysis receives first data associated with a first electrical circuit where the first data has a first protocol. The system samples the first data at a first sampling rate to generate first digital data where the first sampling rate is substantially continuous. Further, the system transmits at a reporting rate that is decoupled from the first sampling rate at least the first digital data over a network having a third protocol that is different from the first protocol. The network can be accessed by wired or wireless access and includes one or more servers in cloud configuration.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: April 21, 2015
    Assignee: eXcorda, LLC
    Inventors: Michel Roger Kamel, Paul W. Donahue
  • Patent number: 8988495
    Abstract: A method for controlling an image display apparatus includes determining a type of a video signal included in an input signal, determining whether three-dimensional (3D) format information is included in the input signal, if the video signal is a 3D video signal, requesting 3D format information about the video signal to a server that stores 3D format information, if the input signal does not include the 3D format information about the video signal, and processing, upon receipt of 3D format information from the server in response to the 3D format information request, the video signal according to the 3D format information and displaying a 3D image based on the processed video signal.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: March 24, 2015
    Assignee: LG Eletronics Inc.
    Inventor: Jeongsim Kim
  • Patent number: 8982938
    Abstract: Methods and test equipment for measuring jitter in a Pulse Amplitude Modulated (PAM) transmitter. Under one procedure, a first two-level PAM signal test pattern is used to measure clock-related jitter separated into random and deterministic components, while a second two-level PAM signal test pattern is used to measure oven-odd jitter (EOJ). Under another procedure, A four-level PAM signal test pattern is used to measure jitter-induced noise using distortion analysis. Test equipment are also disclosed for implementing various aspects of the test methods.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: March 17, 2015
    Assignee: Intel Corporation
    Inventor: Adee O. Ran
  • Patent number: 8982218
    Abstract: A system and method for detecting media source quality are provided. The system includes a data store comprising a computer readable medium storing a program of instructions for the detection of media source quality; a processor that executes the program of instructions; a video data receiver to receive video raw data, the video raw data corresponding to an uploaded and transcoded video; a video improver to apply a video improvement technique to the received video raw data to produce a modified version of the video raw data; and a video quality assessor to compare the received video raw data and the modified version of the video raw data, and based on the modified version of the video raw data improving on a factor associated with the video improvement technique, the video quality assessor indicates a phenomenon affecting the quality of the uploaded and transcoded video.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: March 17, 2015
    Assignee: Google Inc.
    Inventors: Meng Wang, Sang-Uok Kum, Chen Wu
  • Patent number: 8965726
    Abstract: A sensor circuit enables detection of DC offset in a sensor output signal. The sensor circuit includes a sensor that generates a sensor output signal corresponding to a physical signal coupled to an input of the sensor, and a modulator that generates a modulation signal, the modulator being coupled to the sensor to modulate a physical parameter of the sensor and to enable a DC offset to be separated from the sensor output signal. To enable the circuit to measure the DC offset even though the sensor output signal is inversely proportional to the output signal, the circuit includes a feedback circuit configured to generate a feedback signal. The feedback signal is coupled to the input of the sensor to enable the physical parameter of the sensor to be modulated without modulating a portion of the sensor output signal attributable to the physical signal being converted to an electrical signal by the sensor.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: February 24, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Pedram Lajevardi, Vladimir Plamenov Petkov, Christoph Lang
  • Patent number: 8918295
    Abstract: A distributed reflectometry device for diagnosing a network is disclosed. According to one aspect, the device includes at least one transmission line and several reflectometers connected to the network. A transmission portion of the device includes a first memory configured to store at least one test signal and a second memory configured to store weighting coefficients. The transmission portion may also include a first multiplier of a test signal (s) with a coefficient ?m, for producing a measurement m and a digital-to-analog converter connected to the line. A reception portion of the device includes an analog-to-digital converter configured to receive a signal from the line and provide a vector for the measurement m, a second multiplier of configured to multiply the vector with the coefficient ?m, an averaging module, and a post-processing and analysis module.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: December 23, 2014
    Assignee: Commissariat à l'énergie Atomique et aux Énergies alternatives
    Inventor: Adrien Lelong
  • Patent number: 8892380
    Abstract: Methods are described for measuring data in a test setup including an impedance tuner. In an exemplary embodiment, the data is data for measuring noise parameters. The data is measured versus a sweep parameter for one tuner state at a time.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: November 18, 2014
    Assignee: Maury Microwave, Inc.
    Inventor: Gary R. Simpson
  • Patent number: 8886485
    Abstract: Some embodiments of the present invention provide a system that determines whether a cooling device in a computer system is responsive to control signals. During operation of the computer system, a control signal is sent to the cooling device. Next, a response of the computer system to the control signal is measured, wherein the response includes a temperature profile. The frequency content of the control signal is then compared to the frequency content of the temperature profile to determine whether the cooling device is responsive to the control signal.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: November 11, 2014
    Assignee: Oracle America, Inc.
    Inventors: Kalyanaraman Vaidyanathan, Kenny C. Gross, Aleksey M. Urmanov
  • Patent number: 8874396
    Abstract: A processing device configured to induce, during a listening scan of a sense array, an injected touch to produce similar data as would be present during a touch scan of the sense array with a conductive object at a known location on the sense array. The processing device is further configured to compute, using the data, an estimate of a noise metric based on the injected touch.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 28, 2014
    Assignee: Cypress Semiconductor Corporation
    Inventors: Dana Olson, Andriy Maharyta, Steve Kolokowsky
  • Publication number: 20140316725
    Abstract: A method is provided for determining a power noise histogram of a computer system. The computer system includes a skitter circuit with multiple skitter bins, each skitter bin of the multiple skitter bins being connected to a signal line at one or more clock cycles. The method includes: connecting each skitter bin to an individual counter circuit; and incrementing a counter when the respective skitter bin is enabled.
    Type: Application
    Filed: April 7, 2014
    Publication date: October 23, 2014
    Inventors: Martin ECKERT, Hubert HARRER, Thomas STRACH
  • Patent number: 8843335
    Abstract: A method and apparatus are provided for the removal of significant broad-band noise from waveforms acquired for time domain network analysis. The method may include the steps of providing the noisy waveform as an input waveform, determining a frequency domain noise shape associated with the input waveform, calculating a wavelet domain noise shape from the frequency domain noise shape, calculating a discrete wavelet transform of the input waveform to form a wavelet domain waveform, and estimating the noise statistics from the wavelet domain waveform. A threshold may be calculated from the estimated noise statistics and the wavelet domain noise shape, and the threshold may be applied to the wavelet domain waveform to form a denoised wavelet domain waveform. Finally, an inverse discrete wavelet transform of the denoised wavelet domain waveform may be calculated to form a denoised waveform.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: September 23, 2014
    Assignee: Teledyne LeCroy, Inc.
    Inventors: Peter J. Pupalaikis, Anirudh Sureka, Kaviyesh Doshi
  • Patent number: 8825420
    Abstract: A computer implemented method for determining a timing variation for an edge of a waveform under simultaneous switching noise (SSN) conditions is provided. The method includes characterizing an impact of mutual inductive relationships on a pin while the pin is at a quiet state and characterizing a signal edge applied to the pin. The signal edge can be characterized by the slew rate in one embodiment. A voltage change related to a curve characterizing the impact of mutual inductive relationships is identified and the voltage change is applied to a curve characterizing an impact of SSN on the signal edge. The method includes calculating a timing variation correlated to the voltage change applied to the curve characterizing the impact of SSN on the signal edge and presenting the calculated timing variation.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: September 2, 2014
    Assignee: Altera Corporation
    Inventors: Geping Liu, Kundan Chand, Zhe Li, Wui Hung Moo, Joseph Boon Hock Kho
  • Patent number: 8803716
    Abstract: A chip with a built-in self-test (BIST) component capable of testing the linearity of an ADC is described herein. The BIST component uses hardware registers to facilitate a sliding histogram technique to save space on the chip. A subset of detected digital codes are analyzed, and DNL and INL calculations are performed by a controller to determine whether any of the digital codes in the subset exceed maximum or minimum DNL and INL thresholds. New digital codes being detected by the ADC are added to the subset as lower-value digital codes are pushed out of the subset, maintaining the same number of digital codes being analyzed as the subset moves from lower codes detected during lower voltages to higher codes detected at higher voltages. A synchronizer and pointer ensure that the subset moves through the digital codes at the same rate as the analog input ramp source.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: August 12, 2014
    Assignee: STMicroelectronics International N.V.
    Inventors: Ravindranath Ramalingaiah Munnan, Raghu Ravindran, Ravi Shekhar
  • Patent number: 8791689
    Abstract: Disclosed is a probe for an oscilloscope comprising a multi-stage transistor amplifier that acts as an impedance transformer. Said amplifier is a d.c.-coupled emitter follower circuit that is composed of bipolar transistors or a d.c.-coupled source follower circuit which is composed of field effect transistors and the successive amplifier elements of which are dimensioned and tuned to each other in such a way that the resulting offset direct voltage between the input and the output is minimal.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: July 29, 2014
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Martin Peschke, Alexander Schild
  • Patent number: 8762109
    Abstract: Estimating impedance of energy storage devices includes generating input signals at various frequencies with a frequency step factor therebetween. An excitation time record (ETR) is generated to include a summation of the input signals and a deviation matrix of coefficients is generated relative to the excitation time record to determine crosstalk between the input signals. An energy storage device is stimulated with the ETR and simultaneously a response time record (RTR) is captured that is indicative of a response of the energy storage device to the ETR. The deviation matrix is applied to the RTR to determine an in-phase component and a quadrature component of an impedance of the energy storage device at each of the different frequencies with the crosstalk between the input signals substantially removed. This approach enables rapid impedance spectra measurements that can be completed within one period of the lowest frequency or less.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: June 24, 2014
    Assignee: Battelle Energy Alliance, LLC
    Inventors: Jon P. Christophersen, John L. Morrison, William H. Morrison, Chester G. Motloch, David M. Rose
  • Patent number: 8749641
    Abstract: A system and method for detecting media source quality are provided. The system includes a data store comprising a computer readable medium storing a program of instructions for the detection of media source quality; a processor that executes the program of instructions; a video data receiver to receive video raw data, the video raw data corresponding to an uploaded and transcoded video; a video improver to apply a video improvement technique to the received video raw data to produce a modified version of the video raw data; and a video quality assessor to compare the received video raw data and the modified version of the video raw data, and based on the modified version of the video raw data improving on a factor associated with the video improvement technique, the video quality assessor indicates a phenomena affecting the quality of the uploaded and transcoded video.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: June 10, 2014
    Assignee: Google Inc.
    Inventors: Meng Wang, Sang-Uok Kum, Chen Wu
  • Patent number: 8731855
    Abstract: A method and device for monitoring the noise from a sensor and a use of the method in automobiles for determining a frictional value between tires of a motor vehicle and a road surface, in particular an economical and reliable method for monitoring a sensor noise and a corresponding device for obtaining, amongst other things, system-relevant information may be achieved, wherein an influence on spectral components of the sensor noise signal is determined and compared with set values.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: May 20, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Zheng-Yu Jiang, Matthias Kretschmann, Herbert Preis
  • Patent number: 8712716
    Abstract: Disclosed are a method and an NDT/NDI inspection device deploying digital circuitry to conduct detection and compensation of phase and amplitude shift in responding signals. A digital waveform generator, such as a direct digital synthesizer (DDS) is used to generate a digital sine-wave of a specific frequency and amplitude, mimicking the pulser frequency and amplitude. The sine-wave is converted to analog signal through a DAC and transmitted to the transducer. The received analog sine-wave from the transducer is converted back to a digital signal through an ADC. The transmitted and received digital signals are then compared for phase and amplitude differences. A null circuit involving another waveform generating component is employed to compensate the detected phase and amplitude differences. As a result the phase and amplitude differences are effectively eliminated before being further processed and analyzed for defects information.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: April 29, 2014
    Assignee: Olympus NDT inc.
    Inventors: Andrew Thomas, Marc Dulac
  • Patent number: 8706438
    Abstract: An apparatus for measuring s-parameters using as few as one pulser and two samplers is described. The apparatus calibrates itself automatically using the internal calibration standards.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: April 22, 2014
    Assignee: Teledyne LeCroy, Inc.
    Inventors: Peter J Pupalaikis, Kaviyesh Doshi, Roger Delbue, Anirudh Sureka
  • Patent number: 8706435
    Abstract: A test and measurement instrument converts digital data that represents an input signal into a plurality of bitmaps, and then subtracts one of the bitmaps from another one of the bitmaps to produce a difference bitmap. The difference bitmap does not contain density values that are common to the two bitmaps, but instead only contains the density differences between the two, thereby revealing very small density variations in the presence of large density values. In some embodiments, the difference bitmap is displayed on a display device. In other embodiments, the difference bitmap is used to generate a trigger signal.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: April 22, 2014
    Assignee: Tektronix, Inc.
    Inventors: Kathryn A. Engholm, John F. Turpin
  • Patent number: 8700347
    Abstract: An intelligent electronic device IED has enhanced power quality and communications capabilities. The IED can perform energy analysis by waveform capture, detect transient on the front-end voltage input channels and provide revenue measurements. The IED splits and distributes the front-end input channels into separate circuits for scaling and processing by dedicated processors for specific applications by the IED. Front-end voltage input channels are split and distributed into separate circuits for transient detection, waveform capture analysis and revenue measurement, respectively. Front-end current channels are split and distributed into separate circuits for waveform capture analysis and revenue measurement, respectively.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: April 15, 2014
    Assignee: Electro Industries/Gauge Tech
    Inventors: Joseph Spanier, Andrew J. Werner, Frederick B. Slota, Hai Zhu, Wei Wang, Dulciane Siqueira da Silva, Erran Kagan
  • Patent number: 8694248
    Abstract: Systems and methods for monitoring the accuracy of a global positioning system (GPS) receiver in a marine vessel utilize a GPS receiver receiving a plurality of satellite signals, calculating a global position of the GPS receiver based on the plurality of signals, and determining a signal to noise ratio (SNR) of each signal in the plurality of signals; and a control circuit having a computer readable medium having executable code, and being connected to the GPS receiver by a communication link. The control circuit calculates an average SNR of the plurality of signals and compares the average SNR to a threshold SNR. In one example the threshold SNR varies depending upon a number of satellites sending the plurality of signals and a speed at which the marine vessel is traveling.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: April 8, 2014
    Assignee: Brunswick Corporation
    Inventors: Jason S. Arbuckle, William R. Robertson
  • Publication number: 20140095095
    Abstract: A process variable transmitter, includes an analog-to-digital (A/D) converter that receives a sensor signal provided by a sensor that senses a process variable and converts the sensor signal to a digital signal. A processor receives the digital signal and provides a measurement output indicative of the digital signal. A noise detector receives the sensor signal and generates a first value indicative of a number of positive noise events relative to a positive threshold value and a second value indicative of a number of negative noise events relative to a negative threshold value. The processor evaluates the noise count and generates a noise output, indicative of detected noise, based on the first and second values.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Inventors: Jason Harold Rud, Loren Michael Engelstad
  • Patent number: 8686741
    Abstract: A noise figure deriving device is provided to precisely obtain the noise figure (NF) of a receiver. The noise figure deriving device includes a first NF deriving unit that derives a first noise figure, which is a noise figure when a predetermined receiver-side pin pin1R is connected to a receiver, based on a ratio Y of one power to the other power of two types of reference noise. The noise figure deriving device also includes a second NF deriving unit that derives a second noise figure, which is a noise figure when receiver-side pins pin2R, pin3R, and pin4R are connected to the receiver, based on an inter-measurement-device-side-terminal difference and the first noise figure. The inter-measurement-device-side-terminal difference is a difference between the first noise figure and the second noise figure.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 1, 2014
    Assignee: Advantest Corporation
    Inventor: Takeshi Nagasaka
  • Patent number: 8688400
    Abstract: A device and method for generation of Intersymbol interference (ISI) effects on serial data by direct digital synthesis is described. The features of the present invention allow a user to set parameters such as data rate, voltage amplitude, encoding scheme etc. as per requirements. An ISI parameter value is selected and applied to the serial data to produce ISI effects in the serial data. Alternatively according to another feature the patterns may be set as per industry standards.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: April 1, 2014
    Assignee: Tektronix International Sales GmbH
    Inventors: Sampathkumar R. Desai, Muralidharan A. Karapattu
  • Patent number: 8679369
    Abstract: Disclosed is a method for prediction of a film material such as a raw material for organic EL. In the method, a film material having an evaporation rate (V(%)) represented by the formula below can be predicted based on the values of the constant (Ko) and the activation energy (Ea). V=(Ko/P)×e?Ea/kT wherein Ko represents a constant (%·Torr), P represents a pressure (Torr), Ea represents an activation energy (eV), k represents a Boltzmann constant, and T represents an absolute temperature.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: March 25, 2014
    Assignee: Tohoku University
    Inventors: Tadahiro Ohmi, Shozo Nakayama, Hironori Ito
  • Publication number: 20140077849
    Abstract: The invention provides a phase-locked loop with loop gain calibration and methods for measuring an oscillator gain, gain calibration and jitter measurement for a phase-locked loop. The method for measuring an oscillator gain of a phase-locked loop includes the steps of providing a varying code at an input end of the oscillator; outputting excess reference phase information by a reference phase integral path and outputting excess feedback phase information based on the varying code by a feedback phase integral path; and obtaining an estimated gain information of the oscillator based on the excess reference phase information and the excess feedback phase information.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 20, 2014
    Inventors: Wei-Zen Chen, Shu-Chin Chuang
  • Publication number: 20140081586
    Abstract: A procedure for obtaining noise temperatures of a field effect transistor (FET) embedded on a wafer through an analytical procedure which processes measured noise figure data over transistor's size Pd within a frequency range at constant voltage and current density. The parasitic elements associated with an electrical model of the embedding structures are determined. Then, for each of n=1, 2, . . . N FETs, the scattering parameters and noise figure Fmeas,n are measured, the components of the core model, normalized to the periphery Pd are determined, and the noise contributions of the parasitic components are de-embedded from Fmeas,n. The noise temperatures tgs, tds, and tgd are found by solving the equation 4 ? N i ? G s ? ( F meas , n - 1 ) - y s + ? C T A ? y s - y s + ? T B , n ? T A ? C T C ? T A + ? T B , n + ? y s P d n = A n ? t ds + B n ? t gs + C n ? t gd using at least three values of Fmeas,n and Pd,n.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 20, 2014
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Luciano Boglione
  • Patent number: 8676543
    Abstract: Mechanical oscillators employ the use of resonance parameters, frequency and the quality factor Q, for the measurement of corrosion or deposition. The ability of a mechanical oscillator to measure small amounts of metal loss or deposition is not only dependent upon the mechanical design but is limited by the precision in determining the resonance frequency and Q. Methods for measuring these resonance parameters with a high precision in the presence of noise are provided. The increased degree of precision improves the utility of these devices as sensitive probes for corrosion and deposition (fouling) measurement. The increased degree of precision is enabled in part by employing curve fitting consistent with modeling the mechanical oscillator as a simple harmonic oscillator. This curve fitting procedure, combined with averaging and utilizing signal processing parameters to mitigate noise effects, adds precision in measuring resonance parameters.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: March 18, 2014
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: H. Alan Wolf, Chung-Min Cheng, Dalia G. Yablon, Alan M. Schilowitz, Manuel S. Alvarez, Yvonne Mathez
  • Patent number: 8670947
    Abstract: Embodiments of the invention provide a system and method to measure and represent the measured value of a limit in terms of another measurement, such as clock values or cycles of the system. The system can include, for example, a test and measurement instrument such as an oscilloscope. In another embodiment of the present invention, slew rate de-rated values may be automatically determined through the use of configurable lookup tables.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: March 11, 2014
    Assignee: Tektronix, Inc.
    Inventors: G. R. N. Prasanth, Pechluck Pongched, Raghavendran N., Mark L. Guenther, Krishna N. H. Sri, Manisha D. Ajgaonkar, Anuradha V.
  • Patent number: 8666688
    Abstract: A system and a method is provided for the detection and capture, and in particular for an ultra high speed detection and capture, of transients in input voltages by an intelligent electronic device. The system and method detects transients for input voltages in either phase to phase or phase to neutral measurements and permits a user to set threshold levels for detecting transients in input voltages. In an embodiment, the system and method further provides a field programmable gate array as a controller for managing transient detection. The field programmable gate array includes a state machine for determining the state of the sampled signal with respect to a threshold level at a specified waveform sample period.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: March 4, 2014
    Assignee: Electro Industries/Gauge Tech
    Inventors: Joseph Spanier, Hai Zhu, Wei Wang
  • Patent number: 8660811
    Abstract: A system for estimating bit error rates (BER) may include using a normalization factor that scales a BER to substantially normalize a Q-scale for a distribution under analysis. A normalization factor may be selected, for example, to provide a best linear fit for both right and left sides of a cumulative distribution function (CDF). In some examples, the normalized Q-scale algorithm may identify means and probabilistic amplitude(s) of Gaussian jitter contributors in the dominant extreme behavior on both sides of the distribution. For such contributors, means may be obtained from intercepts of both sides of the CDF(Qnorm(BER) with the Q(BER)=0 axis, standard deviations (sigmas) may be obtained from reciprocals of slopes of best linear fits, and amplitudes may be obtained directly from the normalization factors. In an illustrative example, a normalized Q-scale algorithm may be used to accurately predict bit error rates for sampled repeating or non-repeating data patterns.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: February 25, 2014
    Assignee: Teledyne LeCroy, Inc.
    Inventor: Martin Miller
  • Patent number: 8645091
    Abstract: A method and associated system for evaluating a high-frequency signal (SNE) at a point of interest on a signal path. The high-frequency signal (SNE) at the point of interest on the signal path is calculated by applying an inverse transfer function (iG) for the signal path to an argument of a remote signal (SFE) measured at a remote pickup point on the signal path, wherein the point of interest and the remote pickup point are two distant points on the signal path, wherein the high-frequency signal (SNE) and the remote signal (SFE) are represented as a respective time domain variable, and wherein said calculating is performed by a time domain evaluation process that operates in test equipment for electrical devices. The calculated high-frequency signal (SNE) is transferred to an output device of the test equipment.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: February 4, 2014
    Assignee: International Business Machines Corporation
    Inventors: Joseph Curtis Diepenbrock, Roland Frech