418results about "Line-transmission" patented technology

A multi-drop, packet energy transfer (PET) receiver configured to be electrically connected to a PET transmission line and an electric load comprising receiver front-end circuitry including an input configured to be electrically connected to the PET transmission line, an output; and at least one switch or at least one diode connected at the output. There is a receiver output control and conditioning circuity with an input connected to the switch / diode, an output to be connected to the electrical load. There is a bootstrap capacitor connected across the input, and a bulk capacitor connected across the output and across the electric load. There is a load controller configured to operate the switch / diode to allow power to flow into the receiver output control and conditioning circuitry during transfer periods and to prevent power to flow into the receiver output circuitry during sample periods.

Systems, apparatuses, and methods are described for DC bus management. During startup, a power device may provide power at different voltages to the DC bus to ramp up the voltage of the DC bus from a zero voltage level to an operating voltage level. For example, the power device may be configured to provide power at different voltage levels during the ramp up. During the ramp up, the power device may send communications to query additional devices. Based on a response to the query the power device may set the voltage level. Protocols for over-current, sleep mode, and shutdown mode may include decreasing a higher voltage level to a lower voltage level.

Methods and systems of powering a radio that can be mounted on a tower of a wireless communication system are provided in which a direct current (“DC”) voltage is provided to the radio over a power cable from a power supply configured to change the direct current (DC) output from the power supply based on a measured current level. The power supply is configured to change the DC voltage from a first voltage level to a second voltage level in response to the measured current being greater than or equal to a first threshold value.

The disclosure relates to a transceiver physical layer interface. Example embodiments include a transmission line transceiver (401) comprising: first and second terminals (406a, 406b); a control module (416); an amplifier module (414) connected between the control module (416) and the first and second terminals (406a, 406b); a switchable termination resistance circuit (408, 410) connected between the first and second terminals (406a, 406b), the switchable termination resistance circuit (408, 410) comprising a termination resistance (408) connected in series with a switch (410) controllable by the control module (416); a pair of series connected resistors (418a, 418b) connected between the first and second terminals (406a, 406b); a capacitor (420) connected between a node (423) connecting the pair of series connected resistors (418a, 418b) and a common node (422), wherein the control module (416) is configured to open the switch (410) to disconnect the termination resistance (408) during transmission of a signal via a transmission line (403) capacitively connected to the first and second terminals (406a, 406b).

The invention discloses a bus measurement for calculating and displaying timing characteristics of a bus protocol in a test and measurement instrument. Systems and methods enable measurement in a test and measurement instrument of an operating signal timing parameter of an electrical signal transmitted by a device under test over an electrical bus. The bus timing characteristic analyzer identifies nominal signal timing parameters for the acquired electrical signals. The nominal signal timing parameter is defined by a bus protocol and defines a timing criterion for the electrical signal. The analyzer measures an operating signal timing parameter for each of the acquired electrical signals, and for each of the electrical signals, compares the operating signal timing parameter to a nominal signal timing parameter to determine whether the operating signal timing parameter satisfies a timing criterion. The analyzer then displays a visual indication of each of the electrical signals on the test and measurement instrument, which indicates whether the operating signal timing parameter of the electrical signals satisfies the timing criteria.

The disclosure relates to techniques for power efficient and smart echo cancellation. An apparatus is provided that comprises a finite impulse response filter having a set of M+1 filter coefficients for filtering values of a reference signal to obtain a first filtered reference signal. The apparatus comprises an interval selector for selecting values of the reference signal associated with a k-th time interval of an echo impulse response having N time intervals. The apparatus comprises M delay elements arranged after the interval selector for successively delaying the selected values. The apparatus comprises M+1 error estimators. A first error estimator is coupled to an output of the interval selector. Each of the remaining M error estimators is coupled to an output of a respective delay element. The M+1 error estimators are configured to determine the M+1 filter coefficients to minimize deviation between the first filtered reference signal and the received signal.

System and method for improving the shaving experience by providing improved visibility of the skin shaving area. A digital camera is integrated with the electric shaver for close image capturing of shaving area, and displaying it on a display unit. The display unit can be integral part of the electric shaver casing, or housed in a separated device which receives the image via a communication channel. The communication channel can be wireless (using radio, audio or light) or wired, such as dedicated cabling or using powerline communication. A light source is used to better illuminate the shaving area. Video compression and digital image processing techniques are used for providing for improved shaving results. The wired communication medium can simultaneously be used also for carrying power from the electric shaver assembly to the display unit, or from the display unit to the electric shaver.

A communication device includes: a first adder that adds a reproduction sound to a communication sound of a remote utterer and outputs the communication sound additionally including the reproduction sound to a speaker; and an acoustic echo canceler that cancels, on the basis of the communication sound to serve as a reference signal, an echo component of the communication sound contained in an input signal acquired by a microphone configured to collect a sound in a vicinity.

In an example there is provided a first integrated circuit. The first integrated circuit is configured to receive an audio signal and configured to drive an audio transducer based on the received audio signal. The first integrated circuit is configured to transmit a portion of the audio signal to a second integrated circuit.

Methods, systems, and apparatus, including computer programs encoded on computer storage media relate to a method for acoustic echo cancellation. The system inputs one or more signal representations into an acoustic echo cancellation network comprising one or more network blocks to generate a mask, each network block comprising one or more convolutional blocks, each convolutional block comprising one or more neural networks. The system combines the mask and a near-end audio signal representation to generate an echo-cancelled audio signal representation. The system generates an echo-cancelled audio signal based on the echo-cancelled audio signal representation.

A method for a communications system between at least three devices, the method comprising: determining at least one device of the at least three devices is an ambient transmitting device, the ambient transmitting device configured with a controllable acoustic echo canceller to reduce echoes, wherein the at least one ambient transmitting device is configured to generate at least one ambient audio signal, and wherein the remaining at least two devices are non-ambient devices; controlling the at least one ambient transmitting device to reduce the effect of the controllable acoustic echo canceller; and applying at least one delay difference to at least one communications path between non-ambient devices.

An Ethernet device includes a link test pulse (LTP) generator circuit, a hybrid circuit, a transmit (TX) circuit, a receive (RX) circuit, and a post-processing circuit. The LTP generator circuit generates an LTP signal that is compliant with an IEEE 802.3 standard. The TX circuit transmits the LTP signal to an Ethernet cable through the hybrid circuit. The RX circuit receives an RX signal from the hybrid circuit during a period in which the LTP signal is transmitted through the hybrid circuit. The post-processing circuit performs a cable diagnosis of the Ethernet cable according to the RX signal.

Even when a speech is small, the speech is allowed to be detected and an echo is allowed to be appropriately suppressed. Whenever a sample point of a reception signal transmitted through a receiving signal path that transmits a signal to a speaker is acquired, an optimal mask is sequentially generated or selected from base masks as one or a plurality of masks generated based on a learning signal based on a reception signal acquired within a predetermined period before a time point at which the sample point was acquired. Whenever the optimal mask is selected, whether a double-talk state is present is sequentially detected based on a result of comparing an input signal with the optimal mask. When detecting that a speech is not input to a microphone and the reception signal includes a speech, a process of suppressing an echo is sequentially performed on the input signal.

The present invention relates to a device (100) for connecting a field device (F1, F2, F3, Fn) to a control system (400), comprising a control interface (108) for establishing a data connection with the control system (400), in particular via a data bus (410), for example by means of an Ethernet connection, a field device connector (104) with at least three pins for establishing a connection with the field device (F1, F2, F3, Fn) for data transmission and power transmission, for example via an IO-Link network, a microprocessor (102), a physical layer (116) for ground-referenced communication signals, in particular a physical IO-Link layer “IO-Link PHY”, and a further physical layer (114) for non-ground-referenced communication signals, in particular an SPE layer “SPE PHY”.The field device connection (104) is designed such that the field device (F1, F2, F3, Fn) can be connected for ground-referenced communication signals and for non-ground-referenced communication signals.

Systems and methods are described for controlling adaptive filtering components. A far end signal may be filtered by each of a foreground filter and a background filter, where both filters are adaptive echo cancellation filters that output echo estimations. Control logic may halt adaptation by the background filter based on a deviation signal. To determine the deviation signal, cross-correlation coefficients for the echo estimations produced by both filters may be determined for each frequency bin of the far end signal. The determined cross-correlation coefficients may be summed across a plurality of the frequency bins. A hysteresis function may then be applied to the sum associated with the filter associated with the echo estimation used to generate a filtered result. The deviation signal may be activated in response to the hysteresis function outputting a high value, which the control logic uses to turn off adaptation by the background filter.

To provide a charge control device of an electric vehicle and a method for the same in which PLC communication (Power Line Communication) with a charger can be prevented from being interrupted in the process of charging a battery of the electric vehicle.SOLUTION: A charge control device 130 includes: a communication unit 20 which performs the PLC communication with the charger; and a controller 40 which requests the charger for a charging request current, detects a round trip time required until reception of a response for the request, and controls the charging request current based on the detected round trip time.SELECTED DRAWING: Figure 3

A two-wire transmitter is provided. The two-wire transmitter is connected to an external circuit via two transmission lines, uses the external circuit as a power source, and outputs a current signal to the external circuit. The two-wire transmitter includes a measurement data processing circuit connected to a sensor that outputs an electric signal based on measurement data, outputs a first signal based on the measurement data; a current output circuit that determines the current signal based on the first signal; and a shunt adjustment circuit that determines a circuit voltage of the two-wire transmitter based on the first signal.

The embodiments described herein are directed to techniques for performing antenna / cable separation using co-located communication devices. A first device may transmit a reference signal over a predetermined bandwidth. A parasitic signal corresponding to the reference signal may be received via a coupling at a second device co-located with the first device. The second device may be coupled via a port to a first end of a cable, the second end of the cable configured to connect to an antenna. A processing device may determine a ratio of amplitudes of the parasitic signal over a predefined bandwidth. The processing device may then determine a separation status of one or more of the antenna and the cable based on the amplitude of the parasitic signal over the predefined bandwidth.

The disclosure relates to a method and device for detecting at least one target, comprising: transmitting a sensing signal; obtaining a first channel estimation result corresponding to an echo signal of the sensing signal; obtaining a second channel estimation result based on the first channel estimation result; based on the first channel estimation result and the second channel estimation result, performing over-threshold detection based on a threshold value being used to obtain an index subset related to target(s); and obtaining an over-threshold detection result based on the index subset related to the target(s).

A photovoltaic system and a communication method therefor are provided. The communication method includes: sending, by each slave, a report signal to a master; monitoring for receipt of a response signal from the master; and if at least one slave receives the response signal, the corresponding slave executes a corresponding action based on the response signal. Therefore, communication between the master and each slave is achieved in a mode that each slave actively sends the report signal to the master, and the master is prevented from adopting a roll call query mode in which the master actively sends a request signal to the slaves, such that occupation of bus resources by the master is reduced.

The present disclosure describes an isolated communication device and a multi-level encoding method therefor. The isolated communication device includes a transceiver (10) and an isolation circuit (20). The isolation circuit (20) includes an isolation transformer (T1) having a driver-side winding and a line-side winding, a first serial resistor (R11) that is coupled with a first end of the driver-side winding, and a second serial resistor (R12) that is coupled with a second end of the driver-side winding. The transceiver (10) transmits a differential signal through the first serial resistor (R11) and the second serial resistor (R12), and receives the differential signal, bypassing the first serial resistor (R11) and the second serial resistor (R12). The isolated communication device reduces power consumption by arranging serial resistors at the driver side of the isolation transformer, and improve impedance matching and strengthen bulk current injection (BCI) immunity by arranging serial resistors at both sides of the isolation transformer.

The disclosure relates to apparatus (300) and a method for echo cancellation. The apparatus comprises: an FIR filter having a set of M+1 filter coefficients, the FIR filter being configured to filter a reference signal (301) to obtain a first filtered reference signal (315); an interval selector (340) for selecting values of the reference signal (301) associated with a k-th time interval; M delay elements (321a-c) for successively delaying the selected values of the reference signal (301); M+1 error estimators (331a-d) coupled to respective outputs of the interval selector (340) and the M delay elements to determine the M+1 filter coefficients based on minimizing a deviation measure between the first filtered reference signal (315) and a received signal (122); and a controller (350) configured to determine one or more signal echoes (221, 222) and to adjust the interval selector based on the one or more signal echoes, in order to reduce influence of the signal echoes on communications over the communication channel.

The embodiments described herein are directed to techniques for performing antenna / cable separation using co-located communication devices. A first device may transmit a reference signal over a predetermined bandwidth. A parasitic signal corresponding to the reference signal may be received via a coupling at a second device co-located with the first device. The second device may be coupled via a port to a first end of a cable, the second end of the cable configured to connect to an antenna. A processing device may determine a ratio of amplitudes of the parasitic signal over a predefined bandwidth. The processing device may then determine a separation status of one or more of the antenna and the cable based on the amplitude of the parasitic signal over the predefined bandwidth.

A heating system comprises a gas burner configured to burn gas to produce heat. The gas burner comprises a gas inlet and a gas burner controller. A gas valve is arranged to regulate the flow of gas to the gas inlet of the gas burner. The system includes power lines, and the gas valve is connected to the gas burner controller via one or more of the power lines. A gas valve control unit is operatively connected to the gas valve. The gas valve control unit includes stored parameter data of the gas valve. The gas burner controller transmits an enquiry signal to the gas valve control unit, and the gas valve control unit is operative to transmit the parameter data to the gas burner controller in response to receipt of the enquiry signal. The enquiry signal and the parameter data are transmitted via the one or more power lines interconnecting the gas valve and the gas burner controller.

A method and apparatus comprising computer code configured to cause a processor or processors to receive an audio signal obtained from a microphone, input the audio signal into a neural-network based AHS model, wherein the neural-network based AHS model is trained using a training audio signal, and output an AHS signal from the neural-network based AHS model in which AHS is applied to the audio signal, wherein the AHS signal is a version of the audio signal in which acoustic howling noise of the audio signal is suppressed and target audio of the audio signal is sustained.

Switching between connection and disconnection between a termination resistor of a communication circuit and a transmission path is performed without generating a communication error. A communication circuit (6A) is provided with a communication unit (10), a termination resistor (12), a switch (13), a detection unit (15), and a control unit (16). A communication unit (10) is provided in a device (2) connected to a transmission path (3), and communicates via the transmission path (3) with another communication unit (10) provided in another device (2) connected to the transmission path (3). The termination resistor (12) is connected to the transmission path (3). The switch (13) switches between connection and disconnection between the termination resistor (12) and the transmission path (3). The detection unit (15) detects the total resistance value (R1) of the total resistance connected to the transmission path (3) in a state where the termination resistor (12) is connected to the transmission path (3). The control unit (16) controls the switching between the connection and disconnection between the termination resistor (12) and the transmission path (3) by the switch (13) on the basis of the detection result of the detection unit (15).

A method and apparatus for processing a signal. An implementation of the method includes: acquiring a reference signal of a to-be-tested voice, the reference signal being a signal output to a voice output device, where the voice output device outputs the to-be-tested voice after obtaining the reference signal; receiving, from a voice input device, an echo signal of the to-be-tested voice, the echo signal being a signal of the to-be-tested voice collected by the voice input device; performing signal preprocessing on the reference signal and the echo signal respectively; and inputting the processed reference signal and the processed echo signal into a pre-trained time delay estimation model, to obtain a time difference between the reference signal and the echo signal output by the time delay estimation model. ---

A delay device and a control method of transmission delay capable of performing temperature compensation are provided. The delay device includes a first current source, a second current source, a first resistor, and a delay adjustment circuit. The first current source is configured to provide a first current with a constant temperature coefficient. The second current source is connected to the first current source in parallel and is configured to provide a second current with a negative temperature coefficient. A first terminal of the first resistor is coupled to the first current source and the second current source. A second terminal of the first resistor is coupled to a reference ground terminal. The first resistor generates a control voltage at the first terminal of the first resistor according to the first current and the second current. The delay adjustment circuit is coupled to a transmission wire. The delay adjustment circuit determines a signal transmission delay of the transmission wire according to the control voltage.

Connection and disconnection between a termination resistor of a communication circuit and a transmission path are switched without causing a communication error. Communication circuit (6A) includes communication part (10), termination resistor (12), switch (13), detector (15), and controller (16). Communication part (10) is provided in device (2) connected to transmission path (3), and communicates with another communication part (10) provided in another device (2) connected to transmission path (3) through transmission path (3). Termination resistor (12) is connected to transmission path (3). Switch (13) switches between connection and disconnection between termination resistor (12) and transmission path (3). Detector (15) detects total resistance value (R1) of all resistors connected to transmission path (3) in a state where termination resistor (12) and transmission path (3) are connected. Controller (16) controls switching between connection and disconnection between termination resistor (12) and transmission path (3) with switch (13) based on a result of the detection of detector (15).

In an identification information receiving device connected to an identification information transmitting device by a power line, a measurement value obtainment unit obtains a measurement value of an electric current or a voltage in the power line. An identification information reading unit reads, as binary data, identification information defined by a plurality of bits and superimposed on the electric current or the voltage in the power line by the identification information transmitting device, by determining whether the measurement value corresponding to each bit of the identification information is greater or less than a determination threshold value (other than 0). A threshold value setting unit compares the latest determination threshold value and the measurement value corresponding to each bit of the identification information superimposed on the electric current or the voltage in the power line, calculates two representative values that are a representative value of the measurement value greater than or equal to the determination threshold value and a representative value of the measurement value less than the determination threshold value, and sets the determination threshold value to an intermediate value between the two representative values as an updated determination threshold value.