50 results about "Noise compensation" patented technology

The invention discloses a moire fringe signal compensation method and system based on an MSPSO optimization VMD algorithm. The method comprises the following steps: establishing a mathematical model of moire fringe signals; parameters of a multi-target particle swarm optimization algorithm MSPSO are set and initialized; obtaining a mathematical model of the optimized moire fringe signal; mapping the position of each particle into a parameter combination of a VMD algorithm; decomposing by using a VMD algorithm to obtain a plurality of intrinsic mode function IMF components; envelope entropy corresponding to the IMF component is calculated, and the minimum envelope entropy is used as a fitness function value; the optimal position corresponding to the minimum envelope entropy is recorded, and population extreme value updating is carried out to update the individual optimal position Pbest and the population optimal position Gbest; judging whether an iteration termination condition is met or not; and outputting a calculation result, performing error compensation on the grating moire fringe signal according to actual parameters obtained by calculation, namely decomposing and reconstructing the moire fringe signal, and outputting the compensated signal. According to the invention, noise compensation is realized; and resource occupation and hardware realization difficulty are reduced.

The invention discloses a large language model training-oriented FP8 quantization noise compensation method and system, and relates to the technical field of computer large language model data noise compensation. The method comprises the following steps that: a processor quantizes original data input into a memory according to a designed FP8 format to obtain quantized data representation; and obtaining quantization noise according to the original data and quantization data representation stored in the memory, and constructing a quantization noise training model by taking the quantization noise as a random variable. And designing a noise compensation mechanism by taking the parameters of the quantization noise training model and the compensation model stored in the memory as compensation units. And the processor determines an embedding point of the noise compensation mechanism embedded large language model in a compensation unit training process according to the compensation granularity demand, so that the original data is input into the large language model embedded with the noise compensation mechanism through the processor for iterative learning, and FP8 compensation data is output. By adopting the method, the hardware calculation speed can be increased and the memory access frequency can be reduced in the big language model data processing process.

The invention relates to the technical field of underwater vehicle control, in particular to an underwater vehicle trajectory tracking method and system based on polynomial noise compensation. The method comprises the following steps: acquiring a theoretical trajectory, an actual trajectory and a velocity vector of an underwater vehicle; constructing a tracking constraint condition and a quadratic programming objective function; obtaining a time-varying linear equation through a Lagrange function and a KKT condition; introducing a logarithmic mapping activation function and a polynomial anti-noise compensation item to construct a continuous time DRZNN model; discretizing the model to obtain an iterative formula; solving a velocity vector sequence according to an iterative formula, and tracking the trajectory of the underwater vehicle according to the velocity vector sequence; the high-order time-varying noise is structurally counteracted through the polynomial anti-noise compensation item, the convergence direction is stabilized through the logarithm mapping activation function, the trajectory tracking error is converged to the preset precision in the complex disturbance environment, and the tracking precision and robustness of the underwater vehicle in the deep sea scene are remarkably improved.

A noise decibel testing method and device based on a smart wearable device, comprising: obtaining a PCM value of an audio signal of the smart wearable device and converting the PCM value into an RMS value; converting the RMS value into a voltage value, and then converting the voltage value into a sound pressure value; calculating a noise decibel of the audio signal according to the sound pressure value to obtain a first noise decibel value; obtaining a noise decibel compensation value by fitting a noise compensation curve; and compensating the first noise decibel value based on the noise decibel compensation value to obtain an actual noise decibel value tested by the smart wearable device. According to the audio signal of the smart wearable device, the first noise decibel value is obtained, the noise decibel compensation value is obtained by fitting the noise compensation curve, the first noise decibel value is compensated, and the actual noise decibel value measured by the smart wearable device is obtained, thereby solving the problem that the existing special instrument for testing noise decibel cannot be integrated into a smart watch and thus cannot directly test an external noise decibel value.

The invention relates to an EMC discrete noise compensation circuit, and the circuit comprises a noise generation module which is used for generating a square signal and a gain adjustment signal based on a discrete noise signal, and the square signal and the discrete noise signal are the same in frequency and are opposite in phase; the gain amplification module is used for generating a noise compensation signal which counteracts the discrete noise signal based on the square wave signal and the gain adjustment signal; and the signal coupling module is used for coupling the noise compensation signal to an EMC (Electro Magnetic Compatibility) port of the electronic equipment so as to offset the discrete noise signal. According to the method, a specific noise source is introduced innovatively, the effect of totally compensating and counteracting the excessive noise signal is achieved by coupling the inverted same frequency noise signal and the original noise signal, various complex combination attempts such as filtering, suppression, bypass, shielding and grounding of traditional measures are abandoned, and the method is simple, clear and easy to implement.

Methods, systems, devices, and media are provided that reduce noise of a touch sensor panel attached to a display panel, the method comprising: in a case that a reference signal is input to the display panel, sensing a first test noise signal of a first frequency at a first receiving electrode of the touch sensor panel, and sensing N second test noise signals of the first frequency at N second receiving electrodes of the touch sensor panel, respectively, where N is a positive integer, where the first frequency is a frequency in or related to an in-band frequency range, where the in-band frequency range is a band-pass range including a driving frequency of a driving signal; based on a result of the sensing, determining N gains in power and phase between each second test noise signal and the first test noise signal, respectively; based on the N gains, determining N noise compensation signals for reducing or canceling N second actual noise signals of the first frequency at the N second receiving electrodes in a case that a display signal is input to the display panel.

The invention relates to a phase noise compensation method and a distributed optical fiber sound wave sensing system. The method comprises the following steps: S1, simultaneously receiving a light source phase noise signal and a coherent receiving signal of a scattering signal for sensing through a group of coherent receivers; s2, performing low-pass and high-pass filtering on the coherent receiving signal, and extracting a light source phase noise reference signal and a sensing signal; s3, on the basis of the phase noise reference signal, respectively performing phase noise extraction and reconstruction on the transmitted detection optical signal and the local oscillation optical signal in the coherent receiving process; s4, compensating phase noise introduced by local oscillation light according to the reconstructed phase noise signal, and performing time domain and frequency domain reconstruction on the detection light signal to obtain a matched filtering kernel function after phase noise compensation; and S5, carrying out signal demodulation based on the coherent receiving signal after phase noise compensation and the reconstructed matched filtering kernel function. Compared with the prior art, high-precision phase noise compensation can be realized under the condition of low complexity.

The invention discloses a partition cooperative scanning method and system for a flexible touch screen, and relates to the field of display screens. In the method, the touch panel is divided into a plurality of preset partitions; scanning each preset partition by adopting a first scanning mode to obtain an original touch signal of each preset partition; dividing the touch panel into an active zone and an inactive zone comprising a plurality of inactive zones, and selecting the inactive zone in a preset zone from the inactive zone as a noise sampling point; scanning the activity partition by adopting a second scanning mode to obtain an activity signal, and scanning the noise sampling point by adopting the second scanning mode to obtain a local noise sample; constructing a noise reference model to obtain a noise compensation distribution matrix; and denoising the activity signal based on the noise compensation distribution matrix to obtain a target touch signal, and analyzing a touch point coordinate based on the target touch signal. By implementing the technical scheme provided by the invention, the user experience is improved.

The application discloses a low-delay level shift circuit with high CMTI, comprising a V / C conversion circuit, wherein the V / C conversion circuit is connected with a C / V conversion circuit and a short-time pulse generation circuit respectively, the C / V conversion circuit is connected with a clamping circuit, a CLK generation circuit and a register circuit respectively, the short-time pulse generation circuit is connected with a high-frequency transient voltage zero elimination circuit, the high-frequency transient voltage zero elimination circuit is connected with the CLK generation circuit and the register circuit, and the CLK generation circuit is connected with the register circuit. The low-delay level shift circuit with high CMTI combines high-speed level shift technology with anti-common-mode noise technology; wherein, the high-speed level shift adopts a pre-storage technology, and the next output state is loaded in advance, so that the signal transmission delay of the level shift circuit is effectively reduced; on this basis, the circuit increases a common-mode noise compensation technology, and high-frequency transient common-mode noise can be collected to compensate the adverse effects of the common-mode noise on the level shift output signal.

In one possible example aspect, the present disclosure provides a context-aware noise compensation system for a wearable device playing back media content to a user in a noisy environment, wherein the system is configured to: obtain a sound signal from the noisy environment; determine context information associated with the sound signal, wherein the context information comprises at least one of: vocal sound detection information indicative of presence of one or more vocal sounds of the user in the sound signal, or sound event detection information indicative of presence of one or more environmental sound events in the sound signal; and optimize, based on the context information, the media content for playback by the wearable device.

The application provides a MEMS navigation system optimization control method and a MEMS navigation system, and relates to the technical field of inertial navigation. The method comprises the following steps: determining noise compensation parameters according to measurement data of a target MEMS inertial measurement chip, and performing vibration compensation on each MEMS inertial measurement chip according to the noise compensation parameters; determining the weight of each MEMS inertial measurement chip according to the measurement data of each MEMS inertial measurement chip; and performing weighted summation on the measurement data of each MEMS inertial measurement chip based on the weight of each MEMS inertial measurement chip to obtain target measurement data. The common vibration error of each chip is uniformly corrected based on the target chip measurement data, and the system error is reduced. Meanwhile, multiple chips are redundantly arranged, random errors are reduced through information fusion, the measurement accuracy of the navigation parameters is improved, and the positioning accuracy of the navigation system is further improved.

The system includes D MISO filters and D interference cancellation filters, and multiple received signal sequences are D first received signal sequences. Each of i-th (i is an integer between 1 and D) MISO filters included in the D MISO filters receives i-th D received signal sequence as input and estimates i-th single transmitted signal sequence included in D transmitted signal sequences. Each of i-th interference cancellation filters included in the D interference cancellation filters receives a signal obtained by transforming i-th single estimated transmitted signal sequence, which is the estimation result of i-th single transmitted signal sequence, through phase correction processing and noise compensation processing, and the i-th D received signal sequence. The system cancels interference signals included in the i-th D received signal sequence, outputs the i+1-th D received signal sequence, and estimates D transmitted signal sequences including the i-th single transmitted signal sequence.

The application discloses a multi-frame fusion fixed image noise dynamic compensation system and method, and particularly relates to the technical field of image processing, and is used for solving the problem of the existing independent noise compensation leading to the noise band artifact of the fusion boundary; a mapping relationship between the pixel-level imaging parameter difference degree and the fusion weight is established by acquiring a multi-frame image sequence with different imaging parameters and identifying a transition area with a dramatic change in luminance gradient; a noise visibility correction factor is generated by extracting the frequency energy skewness feature and the chroma phase change boundary feature of the transition area through nonlinear fusion; the multi-frame noise compensation is cooperated by dynamically constraining the compensation intensity range; finally, the cooperative compensation is executed within the constraint range and fused and output; the discontinuity of the fusion boundary noise is effectively eliminated, and the visual quality of the high dynamic range imaging is significantly improved.

The present application belongs to the field of seismic signal acquisition, and particularly relates to a seismic signal acquisition system, method and device based on a low-noise MEMS inertial sensor, aiming at solving the problem that the prior art cannot decouple and eliminate noise at the system level. The present application comprises: an inertial quantity sensitive unit for converting a seismic signal into a capacitance signal; a reference voltage unit for providing force feedback and gain reference voltage; a readout unit for converting the capacitance signal into a voltage signal; a noise suppression unit for detecting the output of the reference voltage unit and generating two compensation signals; a loop control unit for realizing the closed-loop control required by the system; two adders for completing the summation of the two compensation signals and the main path signal before and after the loop control unit, realizing noise compensation; and a feedback control unit for generating a feedback control signal and applying it to the inertial quantity sensitive unit, so that the inertial quantity sensitive unit is always in a balanced position. The present application suppresses noise at the system level through the noise suppression unit, improving the ability to capture weak seismic signals.

The application relates to a waveguide loss measurement method based on double-channel detection, which is used for accurately obtaining the linear loss coefficient of a nonlinear waveguide to be measured. Pump light, probe light and auxiliary laser are combined and injected into the waveguide to be measured to trigger a four-wave mixing effect to generate idler light; then, the waveguide output light is split into two paths through a light splitting element, and the idler light signal and the auxiliary laser signal are extracted as a measurement channel and a reference channel; the waveguide temperature is adjusted to stabilize the idler light power, and a linear interval of the probe light and the idler light power is obtained through fitting; the probe light power is fixed in the interval, a noise compensation factor is generated by using the average power and the instantaneous power of the auxiliary laser, the idler light power is corrected in real time, and finally the waveguide loss is calculated based on the corrected data. The method realizes real-time noise cancellation through double channels, combines parameter locking and linear interval screening, greatly improves the measurement stability and precision, and adapts to the loss detection requirements of various nonlinear waveguides.

The invention discloses a ripple and noise compensation method and system for charging pile electric energy metering. The method comprises the steps of obtaining charging current measurement data of charging pile electric energy metering equipment, performing frequency domain analysis, preliminarily estimating a ripple proportion, and decomposing the charging current measurement data into a low-frequency sub-band and a high-frequency sub-band based on ripple proportion wavelet transformation. Calculating a ripple proportion of the low-frequency sub-band, generating a ripple reference signal according to the ripple proportion of the low-frequency sub-band, and performing LMS adaptive filtering and system error correction based on the ripple reference signal by using an LMS adaptive notch filter to obtain a pure current signal of the low-frequency sub-band; de-noising to obtain a pure current signal of the high-frequency sub-band; and reconstructing the pure current signals of the low-frequency sub-band and the high-frequency sub-band into pure current signals through wavelet inverse transformation. The invention aims to dynamically compensate and suppress the ripple and noise interference in the current measurement signal of the charging pile, so as to improve the measurement precision, and enable the charging pile to meet the strict requirements of electric energy measurement precision and reliability.

A patient support apparatus comprises a plurality of load cells, a frame supported on the load cells, a mattress, a vibration sensor, and a control system. The mattress includes a plurality of inflatable zones positioned on the frame, the mattress and frame cooperating to direct any patient load through the mattress and frame to the load cells. The control system includes a controller operable to receive a separate signal from each of the plurality of load cells and the vibration sensor and process the signals to identify motion of the patient.

The application provides a communication method and a communication device. The method comprises: a terminal device receiving first indication information, the first indication information being associated with at least two scheduled terminal devices, i.e., the first indication information being related to the at least two scheduled terminal devices; the terminal device determining a first parameter based on the first indication information and sending second indication information, the second indication information indicating the first parameter, the first parameter comprising a noise-related parameter and / or an interference-related parameter, and the first parameter being available for determining a downlink precoding matrix. In this way, when determining the downlink precoding matrix, the network device can perform interference and noise compensation based on the noise-related parameter and the interference-related parameter, so that when performing downlink data transmission based on the downlink precoding matrix, the SINR value of each stream can be effectively improved, thereby improving the system communication performance.

A computing device: receives, from a communication device at which microphonic noise is occurring: a microphonic indicator indicating a type of the microphonic noise; and audio sample(s) that include the microphonic noise; and selects, using the indicator, a microphonic noise compensation model pretrained for compensating for the type of the microphonic noise. The computing device retrains, using the audio sample(s) that include the microphonic noise, the compensation model to compensate for the type of the microphonic noise, and applies the compensation model, as retrained, to at least one of: further audio sample(s) received from the communication device that include the microphonic noise; and an audio test set that includes the type of the microphonic noise. When the compensation model compensates for the microphonic noise in at least one of the further audio sample(s) and the audio test set, the compensation model, as retrained, is deployed to the communication device.

The invention relates to a method for calculating a noise compensation for a concealed mounted ultrasonic sensor system (1), in particular for a vehicle with a wall material (2), comprising the following steps: detecting reference ambient information (100) using an ultrasonic sensor (5) of the ultrasonic sensor system (1), the reference ambient information comprising noise signal information (3) and / or air-borne sound signal information (4) related to the wall material (2); storing the reference ambient information (200); detecting real-time ambient information (300) using the ultrasonic sensor (5), the real-time ambient information comprising noise signal information (3) and / or air-borne sound signal information (4) related to the wall material (2); and forming a difference signal between pieces of ambient information (400) of the reference ambient information and the real-time ambient information using a calculation unit (6). The invention also relates to a system for calculating an ultrasonic compensation, the system having means for carrying out the steps of the method. The invention also relates to a vehicle having a system for calculating an ultrasonic compensation. The invention also relates to a computer program, a data carrier signal and a computer readable medium.

A method of compensating for ambient noise during a teleconference may involve estimating, by a control system, a current speech spectrum corresponding to a speech of a remote teleconference participant; estimating, by the control system, a current noise spectrum corresponding to ambient noise in a local environment in which a local teleconference participant is located; calculating, by the control system, a current speech intelligibility index (SII) based at least in part on the current speech spectrum and the current noise spectrum; determining, by the control system and based at least in part on the current SII, whether to adjust a local audio system used by the local teleconference participant, where the determining involves evaluating the current SII according to one or more target SII parameters; and updating at least one of the one or more target SII parameters in response to a user input corresponding to the playback volume change.

The invention relates to a method for noise suppression for an occupant of a motor vehicle, wherein an in-ear earphone (1) is used (S1), wherein ambient noise is detected by at least one microphone (2) and noise compensation (S2) is performed by means of a computing unit (3) to partially eliminate the ambient noise by generating anti-noise, wherein the computing unit (3) executes a pre-trained machine learning model and thereby makes a selection (S3) as to which ambient noises are allowed to pass through to the occupant and which are eliminated, wherein the computing unit (3) is connected to a control unit (4) of the vehicle and the machine learning model makes the selection based on current information from the control unit (4) of the vehicle, wherein the computing unit (3) decides to allow the speech of a passenger to pass through.where an acoustic signature of the passenger is known to the machine learning model, and wherein the passenger is prompted to provide a speech sample by the control unit (4) of the vehicle or by the computing unit (3) when the passenger is unknown to the machine learning model in order to derive an acoustic signature of the passenger and to store him as known by assigning his acoustic signature.

The invention relates to a control unit for a vehicle for specifying a level of an audio signal for a loudspeaker unit (1) in the vehicle, comprising a module (3) for determining a target level for compensating ambient noise, and comprising a sound adjustment unit (5) for generating a desired sound image of the loudspeaker unit (1) by adjusting the audio signal, wherein a signal feedback (7) is provided from the sound adjustment unit (5) to the module (3), which transmits information about a current adjustment of the audio signal by the sound adjustment unit (5) to the module (3), and wherein the module (3) is designed to adjust the target level depending on the information about the current adjustment by the sound adjustment unit (5).

Embodiments of the present invention relate to the field of noise compensation. Disclosed are a nonlinear control compensation method for intermodulation distortion of a sound-producing component, a device, and a medium. In the present invention, the method comprises: acquiring a sound source having an excitation signal obtained by mixing multiple frequencies and test sound pressure response data corresponding to the excitation signal as training set data; using the training set data to train an intermodulation distortion model; and using the trained intermodulation distortion model to perform intermodulation distortion compensation on a sound-producing component. By training in this way, response results of the sound source under different excitation signals can be obtained, then compensation-related parameters for intermodulation distortion problems are determined, and the intermodulation distortion problems of the sound-producing component are compensated by means of the intermodulation distortion model, thereby reducing the noise of the sound-producing component, and improving the auditory experience of a user.

The invention discloses a water pump control method and system of an engine cooling system, a vehicle and equipment. The water pump control method of the engine cooling system comprises the steps that the noise value in an engine cabin, the vibration coefficient of a water pump and the temperature of cooling liquid on the water outlet side of an engine are obtained; according to the noise value in the engine cabin, or according to the vibration coefficient of the water pump and the temperature of cooling liquid on the water outlet side of the engine, whether noise reduction treatment is conducted on the water pump or not is determined; if yes, a noise compensation coefficient is obtained according to the noise value in the engine cabin and the vibration coefficient of the water pump, and the noise compensation coefficient is not larger than 1; obtaining a target rotating speed of the water pump according to the noise compensation coefficient and the preset rotating speed of the water pump, and adjusting the water pump according to the target water pump. By adopting the method, noise reduction judgment can be performed by combining cabin noise, the water pump vibration coefficient and the cooling liquid temperature, the noise compensation coefficient is calculated, and the water pump rotating speed is accurately adjusted, so that the engine noise is effectively reduced, and the user experience is improved.

The invention relates to the technical field of community medical treatment, and provides a community hearing screening method and system based on adaptive correction of environmental noise, and the method comprises the steps: obtaining a sound signal in a test environment, and carrying out the short-time Fourier transform, and obtaining a frequency domain spectrogram; for each key frequency, finding an index closest to the key frequency on a frequency axis in the frequency domain spectrogram, taking intensity values of the index in all time frames, calculating an average value, obtaining an original noise amplitude average value corresponding to the key frequency, carrying out smooth processing, calculating the average value, obtaining average noise, and if the intensity values are lower than a set value, outputting the average noise; if yes, determining that the testing environment is suitable for testing; and for each key frequency, playing pure tone, recording the minimum volume which can be heard by the subject as an initial baseline threshold value, performing noise correction to obtain a baseline threshold value after noise compensation, and if the baseline threshold value exceeds a clinical boundary value, determining that potential hearing loss is detected. And personal errors and environmental interference are obviously reduced.

This invention discloses a fractional phase-locked loop (PLL) based on multi-path quantization noise compensation. It introduces a data synchronization circuit based on the falling edge of the reference clock, ensuring that the divider signals of all paths have reached steady state before the phase detector is triggered by the next rising edge of the PFD, thus completely eliminating dynamic timing interference in the mixed-signal path. By introducing a multi-path retimer with a sign bit, the compensable quantization noise range is expanded. The current-DAC type charge pump proposed in this invention adopts a charge pump architecture based on a source switch array and a static discharge current. The source switch array utilizes the low impedance characteristics of the source nodes of the current source transistors, significantly improving the switching speed and reducing the settling time. The static discharge current forces the loop to maintain a fixed non-zero phase offset in the locked state, permanently shifting the charge pump operating point out of the nonlinear region and deeply suppressing fractional spurious emissions.

The invention discloses a big data driving type video monitoring target tracking method fusing multi-source Internet of Things data, belongs to the technical field of video monitoring and Internet of Things crossing, and is suitable for multiple scenes such as a smart city and the like. The method comprises the following steps: firstly, optimizing multi-source data acquisition preprocessing through low-energy-consumption task allocation and a scene correction channel model to realize space-time alignment; video, infrared and radar features are extracted in a differentiated mode, and fusion features are generated through similarity measurement and dynamic fusion; then, target initial detection is completed through big data driving model initialization and feature enhancement; predicting a target state by using a self-adaptive noise compensation model, and updating the state in combination with sequence correlation; and finally, balancing tracking precision, real-time performance and energy consumption through multi-dimensional feedback and parameter iterative optimization. According to the method, complex scene interference can be suppressed, the problem of uneven node load is solved, and the tracking performance and equipment endurance are improved.

The application relates to a low-noise compensation structure for the installation posture of a ship high-pressure pipeline system pump source operation mode, relates to the field of ship vibration noise control, and comprises a pump group, a balance flexible connecting pipe fixedly connected to the inlet and outlet pipelines of the pump group, a damping platform arranged on the pump group, a vertical adjusting assembly arranged on the damping platform relative to the pump group, and the vertical adjusting assembly limiting the pump group to be in a vertical state. The application has the effects of guaranteeing the low-noise operation posture of the pump group, reducing the inclined displacement of the pump group during operation, reducing the vibration noise of the pump group in the operation state, and reducing the mechanical noise of the ship.