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57results about How to "Noise suppression" patented technology
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Conference terminal with echo reduction for a voice conference system
ActiveUS20070189507A1Noise suppressionImproved echo reductionTwo-way loud-speaking telephone systemsSpecial service for subscribersEngineeringLoudspeaker
A conference terminal for a digital voice conference system comprises a first sound transducer means, which is implemented to generate a microphone signal from an acoustic signal, a second sound transducer means, which is implemented to generate an acoustic signal from a loudspeaker signal, a connecting means, which is implemented to enable a connection between conference terminal and a conference central unit, to receive a composite conference signal from the conference central unit, and a means for echo suppression, which is implemented to combine the microphone signal or a signal derived therefrom in a noise suppression means with a composite conference signal in a listening operation of the conference terminal, such that a loudspeaker signal results, in which the acoustic signal, on which the microphone signal is based, is reduced. Such a conference terminal allows the suppression of a remote own echo and a remote foreign echo, whereby digital wireless voice conference systems can be realized, which ensure high voice quality and noise immunity with minimum wiring effort.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
Finite element modeling method based on real material microstructure
InactiveCN104063902AHave pursuasive powerNoise suppressionImage enhancementImage analysisDigital signal processingElement model
The invention provides a finite element modeling method based on a real material microstructure. According to the method, various kinds of digital image technical processing are carried out on SEM scanned pictures, conversion from bitmaps to vector diagrams is achieved, and accordingly the real material microstructure can be mapped into a two-dimensional finite element model. By means of threshold segmentation, gray processing, binarization processing, repeated switch-off and switch-on operations and the technology converting the bitmaps into the vector diagrams, defects presented in the images or reinforcements are clearly segmented from a substrate, and besides attributes of the defects or the reinforcements can be respectively defined in finite element software. According to the method, a high-precision finite element model of the real material microstructure is built directly through the SEM pictures, a digital model is close to a real structure, and authenticity of the finite element model in the calculation process and in calculation results is improved. The method can be widely used in the field of optimization design field taking the defects and heterogeneous material performance judgment into consideration.
Owner:XIANGTAN UNIV
Remote sensing image change detection method based on controllable kernel regression and superpixel segmentation
InactiveCN103258324AGuaranteed edgeSuppress noiseImage analysisPattern recognitionNonnegative matrix
The invention discloses a remote sensing image change detection method based on controllable kernel regression and superpixel segmentation. The problems that only grey information of an image is considered when a difference chart is structured, other feature information is underused, k-means clustering is directly carried out on the difference chart, and therefore the situation that a weak declension area cannot be detected is easily caused are mainly solved. The method comprises the steps of adopting the controllable kernel regression on two input time phase images to respectively extract structural feature matrixes, combining feature matrixes of neighbourhoods with the structural feature matrixes respectively, obtaining a local structural feature matrix, decomposing the local structural feature matrix by using a non-negative matrix factorization algorithm, carrying out a difference chart structure on an obtained coefficient matrix, finally segmenting the difference chart to obtain an over-segmentation image by using a superpixel segmentation method, carrying out the K-means clustering on the over-segmentation image, and obtaining a change detection result. The remote sensing image change detection method based on the controllable kernel regression and the superpixel segmentation can keep marginal information of images, is good in noise proof performance, improves change detection precision, and can be applied to fields of disaster situation monitoring, land utilization, agricultural investigation and the like.
Owner:XIDIAN UNIV
Method for identifying single clicking action and controller
InactiveCN1627244AImprove accuracyReduce construction costsGraph readingMechanical pattern convertionControl signalContact time
This invention provides a method for identifying one stroke operation, which tests the happening of an operation and begins timing when a subject contacts with a touch-control device, then tests the finish of the operation of the contact so as to get the first time distance of the contact and timing is finished after second time distance is timed. If the second time distance is greater than the first, the first one is greater than a preset one, if operation is generated with the contact only one contact time greater than the preset time distance in said second time distance, the control signal expressing the one stroke operation will be generated.
Owner:海威有限公司
Image generation method and device, terminal equipment
ActiveCN105578067ASuppress image noiseImprove clarityTelevision system detailsColor television detailsImage resolutionPixel array
The invention provides an image generation method and device, and terminal equipment. An image sensor that is provided in advance includes a photosensitive pixel array and an optical filter arranged on the photosensitive pixel array, the optical filter includes a filtering unit array, each filtering unit covers m*n photosensitive pixels which form a merged pixel, m*n>1, brightness information of a photographing environment is obtained, a unit pixel quantity P corresponding to the brightness information is determined according to a preset strategy, 1<=P<=m*n, and outputs of a plurality of photosensitive pixels which belong to a same merged pixel is correspondingly processed according to the unit pixel quantity, thereby generating an image of corresponding resolution. Adjustment of the light inlet quantity of a unit pixel is realized through dynamic adjustment of the unit pixel quantity according to the brightness condition of the photographing environment, and the image of corresponding resolution is generated, thereby suppressing noisy points of the image, and improving definition of the image.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Motor controlling circuit with controllable driven current supply
InactiveCN1681193AEasy to control directionNoise suppressionDC motor speed/torque controlDc motor startersFeedback circuitsH bridge
The H-bridge circuit consists of first and second switch unit, and first and second linear unit, and is used to impress driving current on motor. The error amplifier generates error signal that presents the difference between command current signal and driving current detected by current detection circuit. The status control circuit simultaneously controls first and second switch unit and feed back circuit. The error signal is selectively impressed on first and second linear unit to make one of them operate at linear mode and other one operate at off state in order to control driving current being in direct proportion to command current signal. The status circuit also controls braking circuit to make error signal convert to braking signal, and first and second linear unit operate at on state mode.
Owner:GLOBAL MIXED MODE TECH
Navigation data processing method and system
InactiveCN106646544AEffective trackingHigh precisionSatellite radio beaconingDiscriminatorProcess module
The invention relates to a navigation data processing method and system. The method comprises the following steps: S1, an input intermediate frequency signal and a carrier signal are subjected to carrier stripping by a mixer; S2, a lead correlation value, an instant correlation value and a lag correlation value are output after a navigation signal and a local pseudo code pass through a correlator; S3, lead and lag navigation data signals enter a code loop phase discriminator, are filtered by a code loop filter and then enter a local pseudo-code generator to make thus generated pseudo code same as that of the intermediate frequency signal in term of phase; S4, an instant road navigation data signal enters a carrier loop phase discriminator, enters a carrier digital control oscillator via the filter, wherein the phase of the carrier generated by the instant road navigation data signal is the same as that of the carrier generated by the intermediate frequency signal. The system comprises a signal input module, a correlator processing module, a code loop processing module and a carrier processing module. The method tracks the motion state of the carrier, improves the tracking accuracy, and obtains an accurate observation value.
Owner:北京瑞德基业光电技术有限公司
Vein dynamic characteristic analysis device based on near-infrared spectrum technique and analysis method thereof
The invention relates to a vein dynamic characteristic analysis device based on a near-infrared spectrum technique and an analysis method thereof. The vein dynamic characteristic analysis device comprises a static table, a near-infrared camera and two reflecting light sources located above the static table, wherein the reflecting light sources are symmetrically arranged by taking a longitudinal axis of the static table as the axis; a near-infrared transmission light source is arranged right under the static table; the near-infrared camera is arranged right above the static table; the near-infrared camera is connected with a computer and is used for sending a detected image to a data processing unit in the computer; the vein dynamic characteristic analysis is realized through a preset algorithm. According to the invention, the near-infrared reflection and transmission light sources are combined, the suitable optical path design is adopted, a noisy point problem caused by a single transmission light source is effectively solved, and the image contrast and the imaging quality are increased. The vein dynamic characteristic analysis device is safe and non-invasive, low in cost and good in instantaneity. The image enhancing processing is combined with the algorithm, such as frame difference, so that the accurate calculation for the dynamic characteristics can be realized.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Motor controlling circuit with controllable driven voltage supply
InactiveCN1681194ANoise suppressionDC motor speed/torque controlDc motor startersDriving currentFeedback circuits
The H-bridge circuit consists of first and second switch unit, and first and second linear unit, and is used to impress driving current on motor. The error amplifier generates error signal that presents the difference between command current signal and driving current detected by current detection circuit. The status control circuit simultaneously controls first and second switch unit and feed back circuit. The error signal is selectively impressed on first and second linear unit to make one of them operate at linear mode and other one operate at off state in order to control driving current being in direct proportion to command current signal. The status circuit also controls braking circuit to make error signal convert to braking signal, and first and second linear unit operate at on state mode.
Owner:GLOBAL MIXED MODE TECH
Portable collection device for high precision myoelectric signal
InactiveCN106308792AHigh input impedanceHigh Common Mode Rejection RatioDiagnostic recording/measuringSensorsSurface electrodeVIT signals
The invention provides a portable collection device for a high precision myoelectric signal. The device comprises a power supply as well as a myoelectric signal collection module, a DSP and a Bluetooth connected in sequence. The myoelectric signal collection module comprises a surface electrode, a difference amplifier, a band-pass filter, a main amplifier, an electrical level lifting circuit, a high precision A / D and a buffer circuit. The DSP achieves digital processing as band-pass filtering for the signal, improved self-adaptive FIR notch filter for power-line interference, wavelet threshold denoising and the like as well as control for the whole device using a digital processing method. The Bluetooth sends the signal to a terminal using a digital processing method. The power supply supplies electricity for the whole device. The device combines an analog circuit and the digital processing technology, which enables very high input impedance and common mode rejection ratio, can effectively restrain noise, enables very high precision of the collected signal, has the advantages of low power consumption, is convenient to carry, and can be well applied to the fields of scientific research, wearable device, and the like.
Owner:WUHAN UNIV
Heat-diffusing sound insulation sheet and heat-diffusing sound insulation structure
InactiveCN104471637ANoise suppressionLayered productsSemiconductor/solid-state device detailsEngineering
The purpose of the present invention is to provide a heat-diffusing sound insulation sheet provided with excellent sound insulating properties and heat diffusing properties and a heat-diffusing sound insulation structure using the heat-diffusing sound insulation sheet. The heat-diffusing sound insulation sheet is obtained by laminating a heat-diffusing member (16) on a sound-insulating member (15). By disposing same inside an external member such as a casing (2), keyboard (3), etc. of a small electronic device, noise generated from an electronic part (5) or a circuit board (4) on which an electronic part (5) is mounted can be insulated. Moreover, by diffusing the heat generated from the electronic part (5) or the circuit board (4) on which the electronic part (5) is mounted, discomfort due to hot spots generated on the external member can be reduced.
Owner:SEKISUI POLYMATECH CO LTD
Phase-locked loop circuit and an associated method
InactiveUS20100225368A1Wider loop bandwidthNoise suppressionPulse automatic controlVoltage-current phase angleLoop filterPhase locked loop circuit
The present invention relates to a PLL circuit and an associated method that allows the PLL circuit to operate at a higher operating frequency with a wider bandwidth and a better out-band noise suppression. The PLL circuit comprises a delay locked loop (DLL), a phase-frequency detector (PFD), a loop filter, a voltage controlled oscillator (VCO) and a frequency divider.
Owner:NAT TAIWAN UNIV
Super-resolution stereoscopic image construction method based on depth perception enhancement
ActiveCN109345444AEnhance the sense of depthNoise suppressionImage analysisGeometric image transformationDepth levelDepth perception
The invention relates to a super-resolution stereoscopic image construction method for depth perception enhancement, comprising the following steps: 1. Dividing a hierarchical region of the image; 2,reconstructing a multi-level super-resolution based on a sparse representation; Step 3. Building a high-resolution stereoscopic image. The invention combines two processes of super-resolution reconstruction and stereoscopic construction, and can effectively suppress noise points. In order to enhance the depth perception of stereoscopic images, different depth levels of image blocks are reconstructed with different fineness of super-resolution.
Owner:ZHEJIANG UNIV OF TECH
Line guidance superpixel coastline extraction method for single-polarization SAR image
ActiveCN108765440ASolve the problem of inaccurate fitIncrease contrastImage enhancementImage analysisAlgorithmHide markov model
The invention discloses a line guidance superpixel coastline extraction method for a single-polarization SAR image. According to the method, a size-adaptive double-side window edge detector is embedded, and an improved ILF algorithm is suitable for an SAR image; an ILF line distribution diagram is embedded into the improved SLIC algorithm, and model parameters are guided and controlled by the ILF;and finally, a Gabor filter and a Hidden Markov Model are adopted to classify superpixels, thereby realizing coastline extraction, solving the problem that existing superpixels cannot adhere to a linear object, and improving SAR image coastline extraction precision.
Owner:DALIAN MARITIME UNIVERSITY
Circuit substrate and manufacturing method thereof
InactiveCN1961622AImprove adhesionNoise suppressionInsulating substrate metal adhesion improvementCross-talk/noise/interference reductionElectrical resistance and conductanceElectrical conductor
Owner:大见忠弘 +1
Back-illuminated CMOS image sensor and manufacturing method thereof
The invention provides a back-illuminated CMOS image sensor and a manufacturing method thereof. The structure such as a bonding pad can be formed through the application of four photomasks, so that the application of the photomasks is reduced; and furthermore, a formed metal gridding is connected with the bonding pad, and comprises a first metal wire positioned in a first isolation groove, a second metal wire positioned in a second isolation groove, and a third metal wire for connecting the bonding pad, the first metal wire and the second metal wire, so that incident light can be preferably limited through the metal gridding, the appearance of crosstalk is avoided, and the quality of the back-illuminated CMOS image sensor is improved. Further, negative pressure is applied onto the bonding pad, so that the negative pressure is also applied onto the metal gridding connected with the bonding pad, namely the negative pressure is applied on a first isolation structure formed in the first isolation groove and a second isolation structure formed in the second isolation groove, and the generation of noisy points and dark current can be inhibited through the negative pressure applied onto the first isolation structure and the second isolation structure.
Owner:OMNIVISION TECH (SHANGHAI) CO LTD
Light diffusion layer and light diffusion sheet
InactiveCN109946772AInhibition effectReduce spectral driftDiffusing elementsRefractive indexSolid content
The invention discloses a light diffusion layer and a light diffusion sheet. The light diffusion layer contains resin and diffusion particles dispersed in the resin, wherein the proportion of the diffusion particles to the solid content of the resin is 0.05: 1 to 3: 1, and the difference between the refractive index of the diffusion particles and the refractive index of the resin is 0.05-1; the particle size of the diffusion particles is 1-30 microns; the thickness of the light diffusion layer is 20-200 microns. According to the invention, the light diffusion layer and the light diffusion sheet can convert a light source into an ideal Lambert light-emitting body, so that the influence of large-angle incident light on a signal can be effectively inhibited.
Owner:ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
Power supply device and its designing method
InactiveCN1612451ANoise suppressionSuppress signal interferencePower conversion systemsTransformerEngineering
Power supplier is in use for restraining signal interference generated in electronic equipment caused by fluctuant earth current. The power supplier includes a transformer, a first side circuit, second side circuit, and grounded conductor. Through cascaded a capacitor and an inductor, the method connects the first side circuit and the second side circuit to grounded conductor. Added capacitor can filter out noise and interference in DC and low frequencies components as well as help to maintain representation of lowered electromagnetic interference. Added inductor is in use for getting rid of noise in high frequency and interference. Most part of noise and interference signal is not possible to pass through conduction route formed. The result of the grounded method is that interfere degree is reduced greatly.
Owner:ARIMA COMP
A method and equipment for improving a QR code decoding rate
InactiveCN109711223AReduce noiseImprove decoding rateImage enhancementSensing by electromagnetic radiationGraphicsAlgorithm
The invention relates to a method for improving the decoding rate of a QR code, and the method comprises the following steps: obtaining an image of a frame of QR code, carrying out the searching of aposition detection graph on the image, and recording the number of the position detection graphs and key graph information; if the number of the position detection graphs is greater than or equal to aset value, decoding; the number of the position detection graphs is smaller than a set value, conducting smoothing processing on the image, and conducting position detection graph searching processing on the smoothed image, whether the number of the position detection graphs searched after smoothing processing is larger than or equal to the set value or not is judged, conducting decoding processing if the number of the position detection graphs searched after smoothing processing is larger than or equal to the set value, and otherwise the decoding process is ended; and decoding the QR code according to the found position detection graph and the key graph information, outputting a result if the decoding is successful, judging whether the image is subjected to smoothing processing or not ifthe decoding is failed, if the image is subjected to smoothing processing, ending the decoding process, and if the image is not subjected to smoothing processing, returning to the smoothing processing step.
Owner:福州符号信息科技有限公司
Double Closed-loop Control Circuit of Micromachined Gyroscope
ActiveCN102620726BEasy to controlHigh precisionPulse automatic controlTurn-sensitive devicesAutomatic controlGyroscope
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Method for identifying single clicking action and controller
InactiveCN1323343CImprove accuracyReduce construction costsGraph readingMechanical pattern convertionContact timeControl signal
This invention provides a method for identifying one stroke operation, which tests the happening of an operation and begins timing when a subject contacts with a touch-control device, then tests the finish of the operation of the contact so as to get the first time distance of the contact and timing is finished after second time distance is timed. If the second time distance is greater than the first, the first one is greater than a preset one, if operation is generated with the contact only one contact time greater than the preset time distance in said second time distance, the control signal expressing the one stroke operation will be generated.
Owner:海威有限公司
Text recognition method and related equipment thereof
PendingCN114241467ANoise suppressionImprove accuracyCharacter and pattern recognitionNeural architecturesImage extractionText recognition
The invention discloses a text recognition method and related equipment thereof, and the method comprises the steps: inputting a to-be-recognized image into a pre-constructed text recognition model after the to-be-recognized image carrying noise information is obtained, and obtaining a text recognition result of the to-be-recognized image outputted by the text recognition model. Wherein the text recognition model comprises a feature extraction network, a recurrent neural network and a transcription layer. The feature extraction network is used for extracting image features of the image to be recognized and suppressing noise information carried by the image to be recognized. Therefore, since the feature extraction network has an image noise suppression function, the image features extracted by using the feature extraction network and aiming at the to-be-recognized image almost do not carry noise information, so that the adverse effect of the noise information carried by the to-be-recognized image on the text recognition process can be effectively reduced; therefore, the accuracy of the text recognition result of the to-be-recognized image can be effectively improved, and the text recognition effect can be improved.
Owner:BEIJING YOUZHUJU NETWORK TECH CO LTD
Disk drive incorporating vibration suppressing mechanism
InactiveCN1297564ANoise suppressionEliminate shockRotating vibration suppressionVibration dampersEngineeringControl theory
A disk drive is provided with a balancer having a hollow circular section (14) that accommodates a magnetic body (13), a clamper (10) that rotates integrally with the disk (1), a magnetism generating device (272) that generates a magnetic flux for coupling with the magnetic body (13) by electromagnetic conversion, and a controller that controls the output from the magnetism generating device (272). By incorporating such a vibration suppressing mechanism, imbalance during disk rotation is canceled and a read error is suppressed when the speed is changed and spinup occurs.
Owner:PANASONIC CORP
Cushion body and foam resin particles for filling cushion body
InactiveCN1564668ANoise suppressionGood touchStuffed mattressesSpring mattressesCushioningFilling materials
A cushion body and foam resin particles for filling in the cushion body capable of solving such a problem that, when the cushion bodies such as a bed, a mattress, a pillow, and a cushion are used for performing a cushioning function, noise is generated each time the cushion bodies are moved to provide uncomfortable feeling to users or awake the users while asleep, wherein foam resin particles with a specified average particle size containing a specified amount of fluidization accelerator are used as the filler for the cushion body.
Owner:SEKISUI PLASTICS CO LTD +1
Audio playing method and device and storage medium
ActiveCN108347672ALarge eigenvalueIncrease changeSubstation equipmentTransducer circuitsThe InternetBreathy voice
The invention discloses an audio playing method and device and a storage medium, and belongs to the field of the Internet. The method comprises the steps that when an instruction for playing a targetsound effect mode, a first audio datum and M second audio data are acquired, so that a sound effect feature value of each second audio datum is determined according to the first audio datum. Accordingto the method, the sound effect feature value of each second audio datum is not determined only according to the M second audio data obtained after the sound effect mode is switched and is determinedaccording to the first audio datum and the M second audio data, the condition that great changes are generated between the feature values of the audio data output in the recent period after the soundeffect mode is switched and the feature values of the audio data output in the recent period before the sound effect mode is switched is avoided, and therefore the problem that noise is generated when the sound effect mode is switched is effectively suppressed.
Owner:GUANGZHOU KUGOU COMP TECH CO LTD
Method of inhibiting noise in multiple talking
InactiveCN1538728BNoise suppressionImprove performanceSpecial service for subscribersBreathy voiceHandset
The method for restrains noise in multiple parties telephone system includes such steps as in procedure of launching a call, user through handset dials a long string of digits including special service number, number of meeting room or group number for multiple parties telephone system; MAP addressing from result of querying database, and querying state of called telephone; hardware server decides whether the call is continued or not; if reproducing signal occurs from exchanger in local bureau, sending a hang up signal to exchanger; if state of called phone is in idle, sanding command to put phone through; in talking procedure, when change of phone state occurs, and reproducing signal will occur, sending a hang up signal to exchanger. The advantages are reliable performances and good effect of use.
Owner:杭州世导信息技术有限公司
Multilayer printed circuit board and method of making multilayer printed circuit board
InactiveCN109803482ANoise suppressionPrinted circuit detailsMultilayer circuit manufactureVoltage referencePrinted circuit board
The invention discloses a multilayer printed circuit board comprising a first external circuit layer, a second external circuit layer, a first reference voltage layer, a second reference voltage layerand a high-loss dielectric layer. The first reference voltage layer is arranged between the first external circuit layer and the second external circuit layer. The first reference voltage layer is used for providing a first reference voltage. The second reference voltage layer is arranged between the first reference voltage layer and the second external circuit layer. The second reference voltagelayer is used for providing a second reference voltage. The high-loss dielectric layer is arranged between and adjacent to the first reference voltage layer and the second reference voltage layer tosuppress the noise generated between the first reference voltage layer and the second reference voltage layer. The first reference voltage is different from the second reference voltage.
Owner:INVENTEC PUDONG TECH CORPOARTION +1
Motor controlling circuit with controllable driven voltage supply
InactiveCN1322664CNoise suppressionDC motor speed/torque controlDc motor startersDriving currentFeedback circuits
The H-bridge circuit consists of first and second switch unit, and first and second linear unit, and is used to impress driving current on motor. The error amplifier generates error signal that presents the difference between command current signal and driving current detected by current detection circuit. The status control circuit simultaneously controls first and second switch unit and feed back circuit. The error signal is selectively impressed on first and second linear unit to make one of them operate at linear mode and other one operate at off state in order to control driving current being in direct proportion to command current signal. The status circuit also controls braking circuit to make error signal convert to braking signal, and first and second linear unit operate at on state mode.
Owner:GLOBAL MIXED MODE TECH
Road extraction method using non-subsampled contourlet direction field
InactiveCN101976443BIncrease the differenceImprove accuracyImage enhancementImage analysisContourletScale dependent
Owner:XIDIAN UNIV
A line-guided superpixel coastline extraction method from single-polarization SAR images
ActiveCN108765440BIncrease contrastFully grabImage enhancementImage analysisHide markov modelComputer science
The invention discloses a line-guided superpixel coastline extraction method for single-polarization SAR images. The method makes the improved ILF algorithm suitable for SAR images by embedding a size-adaptive bilateral window edge detector. And the ILF line distribution diagram is embedded into the improved SLIC algorithm, so that its model parameters are guided and controlled by ILF. Finally, the Gabor filter and the hidden Markov model are used to classify the superpixels, so as to realize the coastline extraction, and then solve the problem that the existing superpixels cannot fit the linear objects, and improve the accuracy of the SAR image coastline extraction.
Owner:DALIAN MARITIME UNIVERSITY
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