262 results about "Noise effects" patented technology

A system and method for separating a mixture of audio signal into desired audio signals (430) (e.g., speech) and a noise sign (440) is disclosed. Microphones (310, 320) are positioned to receive the mixed audio signals, and an independent component analysis (ICA) processes (212) the sound mixture using stability constraints. The ICA process (508) uses predefined characteristics of the desired speech signal to identify and isolate a target sound signal (430). Filter coefficients are adapted with a learning rule and filter weight update dynamics are stabilized to assist convergence to a stable separated ICA signal result. The separated signals may be peripherally-processed to further reduce noise effects using post-processing (214) and pre-processing (220, 230) techniques and information. The proposed system is designed and easily adaptable for implementation on DSP units or CPUs in audio communication hardware environments.

Apparatus, systems and methods of using 70 CFM ventilation fans with heaters for bathrooms having depressibly engageable and depressibly releaseable light covers. The novel ventilation fans and heaters can be mounted to structure in ceilings and inside walls with telescoping suspension brackets that are affixed directly to separate sides of the housing to support the housing against joists and structural supports behind the ceiling. Adjustable louvers on the grill cover allow for outgoing heated air to travel in a different direction into a space from the incoming air travelling into the housing. Plastic type housings around blower wheels reduce undesirable noise effects. The light covers can be easily opened and closed by using depressible engageable fasteners, and depressible release fasteners.

A system and method for analyzing timing and noise effects in a hybrid circuit which contains a plurality of electrical components. The timing and noise effects for the hybrid circuit are generated by simulating electrical conditions within a hybrid circuit model. The hybrid circuit model is constructed by creating and integrating analog and behavioral models from the plurality of electrical components. The timing and noise effects remain accurate even at high printed circuit board/multi-chip module clock speeds, thereby ensuring that a user is able to construct an optimal design for any one of the plurality of electrical components.

The invention discloses a method and a system of detecting a moving object under a dynamic background. The method comprises low-resolution processing to obtain a sub-region of the moving object and high-resolution processing to obtain an accurate detection result. The method can process the dynamic background well. Furthermore, the complementary detection process of high resolution and low resolution, with respect to Gaussian mixture model moving object detection, has the advantages that: firstly, the low resolution can reduce the influence caused by slow background or sudden local disturbance to reduce the detection error of a complementary algorithm. However, the sudden local disturbance cannot be processed by directly using Gaussian mixture model detection, which can cause detection error when the background suddenly changes. Secondly, the complementary detection of high resolution and low resolution is robust to noise effect.

The invention discloses a robust speech emotion recognition method based on compressive sensing. The recognition method includes generating a noisy emotion speech sample, establishing an acoustic feature extraction module, constructing a sparse representation classifier model, and outputting a speech emotion recognition result. The robust speech emotion recognition method has the advantages that effects of noise on emotion speech in the natural environment are fully considered, and the robust speech emotion recognition method under the noise background is provided; validity of feature parameters in different types is fully considered, extraction of feature parameters is extended to the Mel frequency cepstrum coefficient (MFCC) from prosodic and tone features, and anti-noise effects of the feature parameters are further improved; and the high-performance robust speech emotion recognition method based on the compressive sensing theory is provided through the sparse representation distinguishing in the compressive sensing theory.

The invention provides a design method of a safety face verification system based on a CNN (convolutional neural network) feature extractor, belongs to the field of biological feature identification, and particularly relates to a method of utilizing the CNN to extract face features and using a Paillier algorithm and an oblivious transfer technique to encrypt. Compared with the SCiFi (secure computation of face identification) system, the method has the advantages that the manually extracted feature is converted into the CNN self-learning feature, and the CNN self-learning feature is performed with binarization to remove the noise effect, so that the identification accuracy is higher; the testing identification rate is 91.48% on a view 2 of an LFW (labeled face wild) base; in the whole identification process, a server will not obtain any feature information of a requester, and only receive the feature ciphertext information, but not decrypt; a client only obtains whether the identification is passed or not, and does not know the other information, including hamming distance; one face picture is expressed by the 320bit feature, and compared with the SCiFi system, the feature data volume is decreased by 2/3, so that the consumption time of encrypting and identification is low, and the real-time performance is high.

A technique for improving the spatial and/or temporal uniformity of a light-emitting display by providing a faster calibration of reference current sources and reducing the noise effect by improving the dynamic range, despite instability and non-uniformity of the transistor devices. A calibration circuit for a display panel having an active area having a plurality of light emitting devices arranged on a substrate, and a peripheral area of the display panel separate from the active area is provided. The calibration circuit includes a first row of calibration current source or sink circuits and a second row of calibration current source or sink circuits. A first calibration control line is configured to cause the first row of calibration current source or sink circuits to calibrate the display panel with a bias current while the second row of calibration current source or sink circuits is being calibrated by a reference current. A second calibration control line is configured to cause the second row of calibration current source or sink circuits to calibrate the display panel with the bias current while the first row of calibration current source or sink circuits is being calibrated by the reference current.

A method and device for dual-differential sensing is disclosed. The sensing information can be generated from signals provided by a sensing device with a plurality of sensors. Each value of the sensing information corresponds to signals of three sensors, respectively. The sensing device is flexible and configured on a display. The noise effect of the display on the signal of each sensor corresponds to the distance between the display and the sensor. Besides, the noise effect of the display on each value of the sensing information corresponds to the distances between the display and the three sensors, respectively.

The invention discloses a method for dynamically measuring attitude of a star sensor based on top accurate angle relevance and belongs to the field of navigation and positioning. Based on the prior art that dynamic compensation is performed on each measurement exposure frame of the star sensor and a vector matrix matched with a fixed star containing dynamic error and noise effect is obtained, transformation matrixes between every two adjacent measurement frames of the star sensor are accurately measured through an assembly of three tops fixedly linked with the star sensor, the vector matrixes matched with adjacent measurement frames of the star sensor are correlated via the transformation matrixes, and finally, a correlated measurement equation is established by using a series of correlated measurement frames, that is a series of measurement frames are processed as a single measurement frame, and an attitude matrix is solved by using the least square method. With the adoption of the method, dynamic error and noise effect can be effectively restrained, high-accuracy dynamic attitude and change information of a carrier in motion can be obtained.

The invention relates to RMB counterfeit identifying technologies, and provides a counterfeit identifying method and a counterfeit identifying system based on zebra crossing infrared image characteristics. The counterfeit identifying method comprises the steps of A, acquiring an infrared image of RMB and carrying out preprocessing on the acquired infrared image; B, extracting HOG characteristics of the preprocessed infrared image and selecting HOG characteristics which satisfy preset conditions from the extracted HOG characteristics; and C, carrying out counterfeit identifying according to the selected HOG characteristics. The counterfeit identifying method based on the zero crossing infrared image characteristics acquires a zebra crossing anti-counterfeit image of the RMB by adopting infrared light, and carries out processing and identifying on the zebra crossing anti-counterfeit image by using an improved HOG and a support vector machine, thereby being capable of effectively eliminating noise effects and improving the performance of infrared image counterfeit identifying, and being capable of improving the accuracy in counterfeit identification for authentic and counterfeit banknotes.

The invention discloses a repeated alarm processing method based on data filtering, and belongs to the technical field of alarm management. The method comprises the following steps of: optimally designing variable alarm processing parameters by virtue of variable historical process data, and storing the obtained optimal alarm processing parameters in an alarm parameter database; acquiring real-time process data from a real-time database or a distributed control system (DCS); then obtaining window filtering parameters from the alarm parameter database, and filtering the real-time process data;and finally carrying out repeated alarm judgment on the filtered real-time process data, automatically inhibiting the repeated alarm if the repeated alarm is judged, and otherwise displaying alarm information. The repeated alarm processing method has the beneficial effects that the noise effect in the real-time process data is eliminated, the quantity of occurrence of repeated alarms is reduced and the purpose of alarm management in the process industry is achieved.

The invention relates to an infrared image super-resolution reestablishing method based on the compressed sensing theory. According to the method, low-resolution images are used as a foundation and are subjected to partitioning, low-resolution image blocks are regarded as downsampling observation corresponding to high-resolution image blocks, a downsampling model is established, and a downsampling matrix is written. A sparse transformation matrix of the high-resolution image blocks is established and is multiplied by an observation matrix, and a sensing matrix is obtained. According to the low-resolution blocks and the sensing matrix, an OMP algorithm is used for reestablishing sparse coefficients of the high-resolution image blocks, then the sparse transformation matrix is multiplied by the sparse coefficients, and the high-resolution image blocks are obtained. Finally, all the high-resolution image blocks are spliced, and a high-resolution reestablished image is obtained. The method has the advantages of being easy to achieve, quick in operation, stable in performance and good in anti-noise effect, difference operation is used for generating a difference transformation matrix and achieving sparse transformation, complex computing of redundant dictionary training is avoided, shot noise of images can be well removed, and the noise reduction advantage is achieved.

The invention provides a radar communication integrated signal generation method and device. The method includes the following steps: performing three-stage design on a communication symbol sequence to be processed, and performing continuous phase modulation (CPM) on the acquired three-stage communication symbol sequence to generate a CPM signal, and loading the CPM signal to a chirp signal to generate a radar communication integrated signal. Thereby, the three-stage design of the radar communication integrated signal can be realized, and thus the radar communication integrated signal can be limited to a bandwidth range of the chirp signal, the out-of-band attenuation and out-of-band interference of a power amplifier and the noise effects can be avoided, the radar communication integrationrequirements can be met, the original working distance and detection tracking performance of radars can be maintained, and the requirements of high-speed data transmission can also be achieved.

The invention discloses a safety evaluation method for an ocean platform based on integration of vibration identification frequencies and a vibration mode. The method comprises: step one, establishing a finite element model with an undamaged structure to serve as a reference finite element model; performing vibration tests to the undamaged structure, and identifying modal frequencies omega di (i=1,..., m) of front m stages and a vibration mode of the undamaged structure to serve as actual measured modal parameters; and evaluating a whole safety state of a service damaged platform structure. According to the method, safety evaluation of a platform structure can be performed directly on the basis of diagnosis vibration test data identification structure parameter definition and safety evaluation parameters, the problem that structural damage diagnosis and safety evaluation of actual engineering structures are difficult in a structural damage diagnosis method based on vibration detection combination is solved; defects that environmental excitation, noise effects and complete measurement effects are large of conventional methods in actual engineering application are overcome; and the method has the advantages that the computational efficiency is high, the applicability is high, the physical significance is explicit, and the like.

Methods and devices for reducing noise effects in a system for measuring a physiological parameter, including receiving an input signal, obtaining an assessment of the signal quality of the input signal, selecting coefficients for a digital filter using the assessment of signal quality; and filtering the input signal using the digital filter, without comparing the filter's output signal with the input signal.

Audio landscape/pathway lights, devices, apparatus, systems and methods using BLUETOOTH wireless communication technology with integrated speakers, receivers/transmitters, outdoor speaker, PCB control card, driver, amplifier and FM receivers/transmitters. A single primary unit, which can be a pathway (landscape) light, can have a BLUETOOTH receiver and an FM transmitter, a speaker and a light (LED) and LED control. Secondary units can each contain a pathway/landscape light and FM receivers and speaker, and LED control. A Bluetooth enabled device from a portable digital device can send BLUETOOTH audio signals to the primary unit which automatically relays the audio signal to the secondary units so that the audio signal (music, words, and the like) can be synchronized and played simultaneously at all the units without lag time, echoes or reverberation, and without any other undesirable noise effects.

A method for modeling bond wires in an IC package for predicting noise effects generated by electromagnetic coupling in complex bond wire configurations. A look-up table of equivalent LC circuit models for the bond wires is generated that accurately predicts the effects of the bond wire circuitry of a signal transmission system. Switch and mirror techniques are applied to reduce the bond wire configurations necessary to simulate. The method includes: setting parameters related to the IC package layout of groups of bond wires; sub-dividing each group of bond wires into regions, each including a portion of the bond wire or its corresponding pad, and generating dissection planes for the regions consisting of the bond wires; performing a 3D simulation on the regions consisting of the corresponding pads, and a 2D simulation for each dissection plane; constructing equivalent circuit models for groups of bond wires and corresponding pads based on the 3D and 2D simulations results; inputting the equivalent circuit models into a circuit simulator to measure the noise effects; and modifying the layout geometry to meet noise targets.

A transmission tower structure for suspending from an arched crossarm a three phased circuit arranged in a compact delta configuration that improves the surge impedance loading (SIL) of a transmission line, reduces its series impedance, lowers both resistive and corona losses, and moderates electromagnetic fields and audible noise effects at the ground level—all achieved in a cost effective manner. The structure further has a low overall height and aesthetic appearance enhancing the public acceptance of the embodiments.

The invention provides a low current signal amplifier including a pixel converting unit, a pixel read-out sequence control unit, a read-out stage unit, an analog multiplex selector, an output buffer stage unit, a digital time sequence control unit, where an integral reset control signal and said electrical reset control signal are output to the digital time sequence control circuit unit and the pixel read-out sequence control circuit unit respectively; furthermore, the low current signal amplifier includes a clock delay unit, where the master clock signal thereof is output to the pixel read-out sequence control unit and the digital time sequence control unit. According to the invention, a clock delay unit is added to the low current signal amplifier, which avoids the situation of large gate circuits reversed simultaneously, reduces switching noise, and decreases noise effect influenced on the low current signal amplifier.