TEKTRONIX INTERNATIONAL SALES GMBH Patent applications |
Patent application number | Title | Published |
20140185692 | METHOD OF MULTIPLEXING H.264 ELEMENTARY STREAMS WITHOUT TIMING INFORMATION CODED - Embodiments of the present invention multiplex elementary streams without timing information coded to create a transport stream. In some embodiments, ‘n’ number of access units are constructed and pushed into a list one by one. Each access unit is capable of looking ahead to obtain information on timing for the next access unit. A header is constructed by calculating timing information from the topmost access unit of the list. Said header is written in the transport stream and the remaining bytes of the transport stream are filled with data from the said elementary stream. Thus the transport stream is constructed. | 07-03-2014 |
20120179415 | TRIGGER GENERATION FOR DIGITAL MODULATION SIGNAL ANALYSIS - A modulation error is detected every symbol data to generate a trigger signal. The present invention focuses that there are limited patterns of shifts from one symbol data to the next one of the digital modulation signal. Measured values of amplitude, phase and/or frequency of symbol data are latched and then values at the next symbol timing are predicted from the latched measured values using said feature. The predicted and measured values are compared at the following symbol timing. If the difference (error) is over an acceptable range, a trigger signal is provided which allows acquiring a modulation error by symbol data. | 07-12-2012 |
20120162504 | METHOD OF DETERMINING FIELD DOMINANCE IN A SEQUENCE OF VIDEO FRAMES - A method of determining field dominance in a sequence of video frames, the method comprising: generating from a first video frame a top field and a bottom field; interpolating the top and bottom fields to produce an interpolated top field frame and an interpolated bottom field frame respectively; correlating each of the interpolated top field frame and interpolated bottom field frame with a second video frame occurring immediately previous to the first video frame in the sequence of video frames and with a third video frame occurring immediately subsequent to the first video frame in the sequence of video frames; and determining from the outcome of the correlation the field dominance of the sequence of video frames. | 06-28-2012 |
20120099643 | METHOD OF MULTIPLEXING H.264 ELEMENTARY STREAMS WITHOUT TIMING INFORMATION CODED - Embodiments of the present invention multiplex elementary streams without timing information coded to create a transport stream. In some embodiments, ‘n’ number of access units are constructed and pushed into a list one by one. Each access unit is capable of looking ahead to obtain information on timing for the next access unit. A header is constructed by calculating timing information from the topmost access unit of the list. Said header is written in the transport stream and the remaining bytes of the transport stream are filled with data from the said elementary stream. Thus the transport stream is constructed. | 04-26-2012 |
20110249888 | Method and Apparatus for Measuring an Audiovisual Parameter - There is provided a method of measuring 3D depth of a stereoscopic image, comprising providing left and right eye input images, applying an edge extraction filter to each of the left and right eye input images, and determining 3D depth of the stereoscopic image using the edge extracted left and right eye images. There is also provided an apparatus for carrying out the method of measuring 3D depth of a stereoscopic image. | 10-13-2011 |
20110169966 | METHOD AND APPARATUS FOR MEASURING DELAY WITHIN A COMPRESSED DIGITAL STREAM - There is provided a method of measuring delay variation between first and second elementary streams in a digital audiovisual data stream, comprising detecting and storing digital audiovisual data stream timestamp values, detecting and storing elementary stream timestamp values for the first and second elementary streams, interpolating the digital audiovisual data stream timestamp values and elementary stream timestamp values to form data sets having mutual sampling points, and subtracting the interpolated data set for the first elementary data stream from the interpolated data set for the second elementary data stream to form elementary stream difference values indicative of changes in delay over time between first and second elementary streams. | 07-14-2011 |
20110158306 | SIGNAL ANALYZER AND METHODS FOR DISPLAYING CONSTELLATIONS - Constellation display allows a user to evaluate the quality of a signal under test with the constellation display even if the signal is a digital modulation signal that has many possible ideal phases. A signal analyzer | 06-30-2011 |
20110157371 | METHOD OF IDENTIFYING INCONSISTENT FIELD DOMINANCE METADATA IN A SEQUENCE OF VIDEO FRAMES - Embodiments of the present invention provide a method of identifying inconsistent field order flags for a sequence of video frames comprising: for each frame in the sequence of video frames analyzing the frame to make an initial determination of the field order for that frame; averaging the initial determination of the field order over a predefined number of most recently analyzed frames; and determining those frames for which the averaged field order does not match the field order identified by a respective field order metadata item associated with each frame by comparing the averaged field order for each frame to the respective field order metadata item. | 06-30-2011 |
20110018747 | Data Generator Providing Large Amounts of Data of Arbitrary Word Length - A waveform memory | 01-27-2011 |
20110004818 | Method for Visually Confirming a Relationship Between an Edited Packet and Serial Data - A user may easily confirm a relationship between an edited packet and the output serial data derived from the edited packet. The user may edit a packet with known method (step | 01-06-2011 |
20110004745 | Method of Controlling a Measurement Instrument - A method of controlling a hibernation mode for a measurement instrument comprising a computer system and a computer system is provided. In a case that a power switch is turned off in a hibernation mode, contents of a memory of the computer system is transferred to a non-volatile storage device such as a hard disk drive unit under control of an operating system of the computer system and a power circuit of the measurement instrument is turned off. In a case that the power switch is turned on in the hibernation mode, the power circuit is turned on, the transferred contents stored in the non-volatile storage device is transferred to the memory under control of the operating system and the measurement device is initialized under control of application software and data stored in the memory. | 01-06-2011 |
20100272166 | SIGNAL ANALYZER AND METHOD FOR DISPLAYING FREQUENCY DOMAIN DATA - A signal analyzer provides frequency domain data at different time and frequency resolution. First type frequency domain data is derived from time domain data of a signal under test by first type frames and displayed as a spectrogram. A selecting box is displayed on the spectrogram for selecting the first type frames. The signal analyzer produces second type frequency domain data by treating the time domain data corresponding to the first type frequency domain data included in the selected first type frames with the selecting box as one frame by FFT calculation. The resultant second type frequency domain data are displayed as a spectrum that has different time and frequency resolution from the spectrogram. | 10-28-2010 |
20100223487 | Time Synchronization of Master and Slave Devices - A time synchronized measurement system has a master device and a slave device. The master device and the slave device each have a time measurement device for assigning a corresponding time of sending and/or receiving a piece of measurement information. The master device also has a reference clock pulse-generating device for transmitting a reference clock signal to the slave device. The reference clock signal is modulated by a piece of information on a common time basis for the master device and the slave device. | 09-02-2010 |
20100153044 | SIGNAL ANALYZER AND METHOD FOR PRODUCING DATE THEREFORE - To produce data of an initial analysis range and a range zooming a part of it while updating them in parallel. | 06-17-2010 |
20100061463 | VIDEO TYPE CLASSIFICATION - A video classification method includes detecting pulldown video frames from within a sequence of video frames, for each video frame within said sequence identifying those frames containing inter-field motion, for each frame containing inter-field motion generating a corresponding top field and bottom field, separately correlating the generated top field with a top field of the video frame immediately previous to the frame containing inter-field motion and with a top field of the video frame immediately subsequent to the frame containing the inter-field motion, separately correlating the generated bottom field with a bottom field of the immediately previous video frame and with a bottom field of the immediately subsequent video frame and determining from the outcome of said correlations if the frame containing inter-field motion is a pulldown frame. | 03-11-2010 |
20100056179 | Method and Locating Device for Locating at Least One Mobile Radio Subscriber - The present invention relates to a method for locating at least one mobile radio subscriber in a mobile radio network, wherein to each transmitting station a value correlated with the receive field strength of a signal from this transmitting station is allocated; including the following steps: a) from the information determined upon connection setup, a table is created per cell, in which at least one distance parameter to the transmitting station of the cell is allocated to the respective receive field strengths; b) for at least one value correlated with the receive field strength and transmitted in the measurement report, the allocated distance parameter to the transmitting station of the respective cell is read out from the table created in step a); and c) determining at least one point satisfying the distance parameter(s) read-out in step b). | 03-04-2010 |
20100056178 | Method and Locating Device for Locating at Least One Mobile Radio Subscriber - The present invention relates to a method for locating at least one mobile radio subscriber in a mobile radio network. The mobile radio subscriber transmits a measurement report that includes an itemization identifying at least two transmitting stations. A value correlated with the receive field strength of a signal from the transmitting stations is allocated to each transmitting station. A table is organized according to geographic units of a presettable area. A pre-calculated value correlated with the receive field strength of a signal from a transmitting station is allocated to each transmitting station. The transmitting stations are organized according to the values correlated with the receive field strength of the signal from the respective transmitting station. The location of the mobile radio subscriber is determined based on the geographic unit meeting at least one presettable criterion. | 03-04-2010 |
20100034105 | POWER DISPLAY FOR COMMUNICATION SIGNAL AND SIGNAL ANALYZER - In order to easily understand the relationship between communication signals of a plurality of channels, a signal analyzer provides a display showing a stacked bar graph | 02-11-2010 |
20090231033 | Amplifier Circuit - Power consumption of current sources in an amplifier circuit is reduced even during amplifier operation while keeping linearity of an output signal. The amplifier circuit is suitable for use in a signal generator that provides an output signal previously set by a user and having a known level. Positive and negative current sources receive an input voltage Vi depending on an output voltage Vo. An output resistor derives the output voltage Vo from currents provided by the positive and negative current sources. A variable bias generation circuit produces positive and negative bias voltages applied to the positive and negative current sources wherein the positive and negative bias voltages are set while the linearity of the output voltage is maintains using the known output level information. | 09-17-2009 |
20090195525 | Signal Generator Producing Intersymbol Interference Effects on Serial Data - 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 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. | 08-06-2009 |
20090195498 | Signal Generator Providing ISI Scaling to Touchstone Files - A device and method for producing Inter Symbol Interference (ISI) scaling of S-Parameter Touchstone files for the generation of ISI scaling effects on serial data patterns by direct digital synthesis is described. The features of the present invention allow user to set parameters such as data rate, voltage amplitude, encoding scheme etc. as per requirements for the serial data patterns. An ISI scaling value is selected and applied to an S-Parameter Touchstone file representing transmission path effects. The serial data pattern parameters and the ISI scaling value used with the S-Parameter Touchstone file are compiled to generate a digital data waveform record file. The digital waveform record file is applied to a waveform generation circuit for converting the digital data into an analog serial data pattern with ISI scaling effects. | 08-06-2009 |
20090167375 | Signal Generation System - A signal generation system maintains a phase relationship between output signals of first and second signal generators even when the sampling clock frequency is changed. The signal generators are coupled via a communication means including a dedicated cable where the delay amount of the communication means is known and fixed. The first signal generator provides sampling clock, sequence clock and trigger/event signals to the second signal generator and CPUs of the generators share information via the cable. When the frequency of the sampling clock is changed, the CPU of the first or second signal generator calculates the clock number of the frequency changed sampling clock equivalent to the delay amount of the communication means. A delay circuit of the first signal generator | 07-02-2009 |
20090161565 | System and Method of Remote Testing in Loopback Mode Using MGCP/NCS - This invention relates to a system and method of monitoring, by establishing end to end loopback testing across one or more networks with dissimilar transport technologies. The system allows for connection in loopback mode from a standard interface on a test device to a media adaptor located on an IP-based access network, such as a standard multimedia terminal adapter (“MTA”). End-to-End Quality of service delivered over the transmit and receive path can thus be monitored. Loopback tests are initiated from designated endpoints on the network and made operational by attaching a tag to a telephone number, to allow the gateway to signal connection mode to a call agent. The system and method overcome certain inherent limitations of the MGCP/NCS architecture | 06-25-2009 |
20090128633 | System For Detecting Sequences Of Frozen Frame In Baseband Digital Video - An apparatus and method of evaluating whether an image under test is similar to a reference image, the method comprising performing a test on pairs of blocks in turn, each pair of blocks comprising a block of the image under test and a corresponding block of the reference image, the test comprising calculating a difference measure indicative of the difference between the blocks and comparing the difference measure to a threshold, wherein the test is passed if the difference measure betters the threshold, and the image under test and the reference image are deemed to be similar if the test is passed by all of the pairs of blocks. | 05-21-2009 |
20080313516 | Signal Generator and User Interface for Setting Test Sequences and Parameters of a Test Signal - A signal generator generates a WiMedia ultra wideband test signal with a user interface for setting test sequences and parameters of the test signal. Parameters are set for Presentation Protocol Data Units associated with Packet Groups of the test signal. A signal processing unit compiles the Groups containing the Presentation Protocol Data units to generate digital data representative of the test signal. A waveform generator receives the digital data and generating a test signal output having Packet Groups containing Presentation Protocol Data Units. A method is describes for setting test sequences and parameters of an ultra wideband test signal test signal with a user interface of the signal generator. | 12-18-2008 |
20080310490 | Signal Generator and User Interface for Adding Amplitude Noise to Selected Portions of a Test Signal - A signal generator generates amplitude noise on a selected segment of a test signal. A user interface is used for selecting a segment of the test signal and an associated power level for applying amplitude noise at a selected power level to the test signal segment. A signal processing unit compiles the selected power level of the selected segment with the test signal to generate digital data representative of the test signal with selected segments having amplitude noise. A waveform generator receives the digital data and generating a test signal output having amplitude noise at selected segments of the test signal. The method includes the steps of: selecting a segment of the test signal to add amplitude noise; selecting a power level for the amplitude noise; and applying the amplitude noise at the selected power level to the selected segment of the test signal. | 12-18-2008 |
20080294948 | Protocol Tester and Method for Performing a Protocol Test - Embodiments of the present invention provide a protocol tester for performing a protocol test, said protocol tester exhibiting an input for the feeding in of data, a protocol decoding device for the decoding of data, and an output for providing the decoded data, the protocol tester also comprising a device for measuring the bit error rate. A corresponding method for performing a protocol test is also provided. | 11-27-2008 |
20080285672 | APPARATUS AND METHOD FOR EVALUATING JPROPAGATION PATH CONDITIONS - A measurement indicator, “transfer efficiency,” is provided for evaluating conditions of propagation paths of wireless communication systems having a plurality of transmitting and receiving antennas. Transfer functions of signal paths are calculated from data of received signals that are obtained with receiving antennas by receiving OFDM signals transmitted by transmitting antennas. A demodulation matrix is calculated for demodulating a transmitting vector from a receiving vector concerning a desired subcarrier of the received signals. A noise amplification factor is calculated as a square root of a sum of second powers of components of the demodulation matrix of the receiving antennas concerning the desired transmitting antenna. The noise amplification factor or the inverse is displayed as a value or as a graph that has an axis concerning the subcarrier and an axis concerning the noise amplification factor or the inverse. | 11-20-2008 |
20080256154 | Method and Apparatus for Synthesizing a User Defined Pre-Emphasized Arbitrary Waveform for High Speed Serial Data Technologies - The embodiments herein provide a device and method to generate Pre-emphasized signal. In one embodiment herein an input file containing digital data representing a digital data pattern waveform is received and up-sampled by an Fs/Fd rate. The up-sampled digital data is used for generating step response. The generated step response is differentiated to generate coefficients of a pre-emphasis filter which are convolved with the digital data pattern waveform input signal to generate a pre-emphasized digital data pattern waveform file. | 10-16-2008 |
20080244396 | Method for Analyzing a Process of a Communication Taking Place Between at Least Two Instances - Embodiments of the present invention relate to a method for analyzing a process of a communication taking place between at least two instances, wherein the communication process comprises a sequence of several calls, which in turn comprise at least one message, wherein the communication process is represented on a display unit by symbols, and wherein a first plurality of messages forms a first procedure and a second plurality of messages forms a second procedure, and the first plurality of messages is represented by a first symbol and the second plurality of messages is represented by a second symbol, so that one procedure each is represented by a single symbol. Embodiments of the invention also relate to protocol testers for performing the method. | 10-02-2008 |
20080212664 | APPARATUS AND METHODS FOR DISPLAYING SIGNAL CHARACTERISTICS - A receiver | 09-04-2008 |