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93 results about "Noise strength" patented technology
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Voice end detection method based on energy and harmonic
InactiveCN1912993AAdaptablePrevent cutting offSpeech recognitionSignal-to-noise ratio (imaging)Harmonic
This invention relates to a phone end point test method based on energies and harmonic waves including the following steps: pre-processing digitalized sound signals and storing them in a section of buffer storage, shifting and updating the buffer storage and regulating the threshold value every time inputting a signal to judge the Tstart based on the energy, then searching for signals with sonant harmonic wave character from the buffer storage, if sonant is found, then the accurate Tstart is searched, on the contrary, the phone Tstart is searched based on the energy then to search for the phone terminal point according to the signal energy. Advantages: this invention can adjust accuracy based on noise strength so it is adaptive to the S / N ratio of input signals and energy test sphere is rather wide so phones with weak energy will not be omitted.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI +1
Image de-noise process of multi-template mixed filtering
InactiveCN101043581AEasy to implementSimple calculationTelevision system detailsColor television detailsPattern recognitionRunning time
The disclosed picture removing-noise method based on multi-template mixed filter comprises: dividing the objective picture into MXN blocks without superposition to contain every pixel in some block; defining one group of filters including the mean filter and mid-value filter, every with different removing-noise strength; defining a numerical sequence with number standing for picture information size; obtaining the noise variance of the picture, calculating the uniformity level for the picture block to thereby select one filter for finishing the removing-noise. This invention simplifies calculation, and reduces real running time.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI
Method and device for measuring MPEG noise strength of compressed digital image
InactiveUS20070280552A1Easy to processImprove performanceCharacter and pattern recognitionDigital video signal modificationPattern recognitionCompression artifact
A method and system is provided for estimating the strength of block artifacts at each block boundary, based on global and local edge statistics computed from the input image (frame or field picture) in the spatial domain. Such a method systemically measures the strength of the compression artifacts that are associated with block-based compression / coding schemes such as JPEG, MPEG, and H.26x.
Owner:SAMSUNG ELECTRONICS CO LTD
Air conditioner outdoor fan starting method
ActiveCN104236000AReduce noiseReduce workloadSpace heating and ventilation safety systemsLighting and heating apparatusElectricityControl system
The invention discloses an air conditioner outdoor fan starting method. The air conditioner outdoor fan starting method comprises the following steps of initializing, main controlling and noise feeding back. In the initializing step, an air conditioner is powered on to be started, a main control chip gives an outdoor fan starting instruction, and an EEPROM provides a PWM voltage with the initial duty ratio value being a to an outdoor fan. In the main controlling step, the outdoor fan feeds back the actual rotation speed to the main control chip, the main control chip compares the actual rotation speed with a target rotation speed, and if the actual rotation speed is lower than the target rotation speed, the duty ratio value of the PWM is increased according to the time interval T until the actual rotation speed is equal to the target rotation speed. In the noise feeding back process, noise signals are collected regularly, the strength of the noise signals is compared with target noise strength and if the noise strength is higher than the target strength, the value of the time interval T is increased. According to the air conditioner outdoor fan starting method, the noise strength signal is collected and fed back to a control system to be used as a parameter for outdoor fan starting control, the duty ratio of the fan starting voltage is adjusted in an adaptive mode, the starting noise is effectively reduced, and the matching and debugging workload of a fan system is also reduced.
Owner:HAIER GRP CORP +1
Electrocardio signal quality determination indication method and system
ActiveCN103735259AImprove work efficiencyEasy to useDiagnostic recording/measuringSensorsEcg signalHuman body
The invention relates to an electrocardio signal quality determination indication method and system. The method comprises collecting human body electrocardio signals through electrodes to obtain electrocardio waveforms of corresponding leads of all physiological electrodes and the noise type and noise strength; determining the signal quality of each lead according to the noise strength of each lead, and setting sub-lead signal quality zone bits; determining the main lead signal quality according to the sub-lead signal quality zone bits and setting the main lead signal quality zone bit; setting signal quality color indication zone bits according to the main lead signal quality zone bit and setting indication signal quality signal lamps. By means of the method and the system, users can determine whether the collected electrocardio signal quality is good, and accordingly, the work efficiency of electrocardiographic examination is improved.
Owner:EDAN INSTR
Remote sensing image restoration method combining wave-band clustering with sparse representation
ActiveCN103020912ACorrecting Poor Recovery SituationsAvoid insufficientImage enhancementRelevant informationImage resolution
The invention provides a remote sensing image restoration method combining wave-band clustering with sparse representation. In order to improve the spatial resolution of a hyperspectral remote sensing image, according to the characteristics of rich spectral dimension information of the hyperspectral image and different noise strength of different wave bands, a multiband image restoration model is built, the wave bands are mutually restrained and complemented by the aid of high similarity of the wave bands and redundant information, and finally, the high-quality hyperspectral image is obtained. Firstly, the wave bands of the hyperspectral image are clustered, and a large number of wave bands are divided into a small number of categories with large relevant information difference. Secondly, a cluster of wave bands in the same category is built into an integral variation training multiband dictionary by the compressive sensing theory, and the dictionary is used for completing image restoration. Relevancy of a plurality of wave bands is sufficiently used for restoring target images, the spectral characteristics of the target images are kept, and restoration results have higher spatial information and spectral information keeping performance.
Owner:WUHAN UNIV
Steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement
ActiveCN103970273AAchieve perturbationIncreased brain responseInput/output for user-computer interactionGraph readingVisual evoked potentialsBrain computer interfacing
Provided is a steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement. First, an electrode is arranged on the head of a user, a detected electroencephalogram signal is sent to a computer, then movement stimulating units are presented in front of the user through a computer screen at the same time, the movement stimulating units are shielded by two-dimensional noise points obeying Gaussian distribution, the noise point update frequency is synchronized with the screen refresh rate, and the noise strength is represented by Gaussian distribution standard deviation. After the movement stimulating units are formed, the user watches any one of the movement stimulating units, a computer acquires a stimulation starting flag bit and a stimulation finishing flag bit, a computer signal is acquired through a test electrode, the significance probabilities of different stimulation targets are calculated, the targets are judged and indicated through the screen, and then the next target identification is conducted. The steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement can remarkably enhance brain response strength of the user, improve precision and efficiency of an existing brain computer interface, and innovatively improve practical level of the brain computer interface technology.
Owner:XI AN JIAOTONG UNIV
Image reconstruction based visible light and infrared image fusion method
InactiveCN104751432ASolve the fusion trace problemSuppress noiseImage enhancementImaging processingComputer science
The invention discloses an image reconstruction based visible light and infrared image fusion method and belongs to the field of image processing. The image reconstruction based visible light and infrared image fusion method sequentially comprises the steps of calculating the gradient of a registered infrared image and the gradient of a visible light brightness image, estimating noise strength of the brightness image, calculating the weighted sum of the gradient of the brightness image, obtaining a reconstructed image, performing image normalization and reconstruction, combining the reconstructed brightness image and an original visible light color component, and the problem of remarkable difference of image boundaries in the existing image splicing and fusion process is solved. The image reconstruction based visible light and infrared image fusion method can be applied to fusion processing of multiple registered images.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Stochastic resonance method based on multi-scale noise adjustment
ActiveCN103699513AImprove matchRealize stochastic resonance effectSpecial data processing applicationsSignal-to-noise ratio (imaging)Signal-to-quantization-noise ratio
The invention provides a stochastic resonance method based on multi-scale noise adjustment. Relations among a nonlinear system, signals and noise are balanced only by adjusting multi-scale noise modes of the signals according to weak signal detection under a strong noise background, so that a stochastic resonance effect under the fixed nonlinear system and the fixed input noise is realized. By the method, the multi-scale noise modes of the signals to be processed are adjusted, so that the strength of the signals at the scale of signal characteristic frequency is the highest and then gradually reduced along with increase of the scale frequency, the nonlinear system, the signals and the noise are optimally matched by adjusting optimal parameters, so that the stochastic resonance effect under the fixed nonlinear system and the fixed input noise is realized. The method at least has the advantages that adjusting parameters are fewer, the method is insensitive to the noise strength of the signals, high frequency can be directly detected, higher signal-to-noise ratio can be obtained and the like.
Owner:UNIV OF SCI & TECH OF CHINA
Method And System For Digital Noise Reduction Of Scaled Compressed Video Pictures
In a video processing device, scale of a video image is detected for vertical and horizontal directions based on pixel information, for example, per pixel vertical and horizontal gradients. Gradients are utilized or discarded based on picture format, standard deviation of luma levels and pixel location relative to black border edges, graphics and / or overlaid content. Mosquito noise filters are adapted based on scale and / or noise strength. Median and / or linear filter results are selected based on a weakest, a strongest and / or a blended result. Horizontal and vertical operations are performed separately for edge detection, edge strength determination, filtering and filter correction control. Horizontal and vertical block grid spacing and grid shift are determined. Block noise strength is determined. Block noise filters are configured based on scaling and / or noise strength. Filter corrections are limited based on block noise strength. Noise reduction results may be blended to generate a pixel correction value.
Owner:AVAGO TECH INT SALES PTE LTD
Method and apparatus for decoding received data in a communications system
InactiveUS7107513B1Improve stabilityImprove reliabilityData representation error detection/correctionOther decoding techniquesData streamControl signal
A plurality of data streams, which are coded by a convolution code and where coding rates and modulation systems are set respectively, and multiplexed in time division so that multiplex data are composed. A signal-to-noise ratio monitor measures the strength of the noise included in the multiplex data. A comparator outputs a post signal when a comparison indicates that the measured noise strength is equal to greater than a preset value. A multiplex control signal generator inputs an initialization signal into a Viterbi decoder at a timing at which decoding of individual data streams is started based on the received post signal. The Viterbi decoder initializes the calculated path metric upon receipt of the initialization signal.
Owner:SOCIONEXT INC
Visual Ability Improvement Supporting Device
ActiveUS20080136609A1Improve abilitiesHigh sensitivityLighting circuitsArrangements for variable traffic instructionsControl signalOutput device
A visual ability improvement device installed in a vehicle includes a noise generator, a surrounding situation detector, a driver status detector, a vehicle status detector, an operation switch, and a noise output device. A controller of the noise generator determines an optimum strength based on the surrounding situation from the surrounding situation detector, the driver's status from the driver status detector, the vehicle's status from the vehicle status detector, and the correspondence of the optimum representative noise to the above situation and statuses from the correspondence memory. Then the controller generates a noise with the determined the optimum representative noise strength, and outputs to the noise output device such as passenger compartment light a control signal which depends on the generated noise.
Owner:TOYOTA JIDOSHA KK
Hartmann wavefront sensor mode wavefront restoration method based on deep learning
ActiveCN110044498AReduce schema confusionReduce mistakesOptical measurementsNeural learning methodsCamera imageWavefront sensor
The invention provides a Hartmann wavefront sensor mode wavefront restoration method based on deep learning. An image collected by a focal plane camera of the Hartmann wavefront sensor is used as input, a trained artificial neural network is adopted for operating the image, and a modal coefficient of the Hartmann wavefront sensor before entering of optical wave is obtained directly. Compared withthe traditional wavefront restoration method based on a subaperture average slope, the method of the invention can process more information including subaperture spot position and spot pattern in thefocal plane camera image, and can more effectively reduce errors of mode confusion and mode coupling caused by relying on average slope alone. The method can restore a higher-order modal coefficient with higher accuracy under the same measurement noise strength of the focal plane camera.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Method for eliminating environmental noise from voice signal
InactiveCN101458931AAnti-interferenceImprove accuracySpeech analysisEnvironmental noiseFrequency spectrum
The invention relates to a method for eliminating environment noise in voice signals, comprising: (1) setting a voice frame in voice signals; (2) detecting the upper limit frequency value F and the signal noise ratio SNR of the voice frame; (3) according to the upper limit frequency value F and the signal noise ratio SNR, determining a first adjustment parameter alpha and a second adjustment parameter beta corresponding to the voice frame; (4) using the first adjustment parameter alpha, the second adjustment parameter beta, and a preset noise strength factor M to generate a corrected noise strength factor M', wherein the noise strength M'=M x alpha x beta; (5) using frequency spectrum subtraction method, the corrected noise strength factor M' and an energy spectrum equation to process calculation, thereby eliminating environment noise from the voice signals. The invention can effectively eliminate noise interference, improve the adaptability of voice recognition system on different environment noises, improve the correctness of signal recognition, and effectively resisting the interference of background environment noise under low signal noise ratio.
Owner:WUDI SCI & TECH (XIAN) CO LTD
Hearing-aid denoising device and method allowable for adjusting denoising degree
ActiveCN103813251AImprove operational flexibilityImprove experience comfortDeaf-aid setsTime domainPattern recognition
The invention provides a hearing-aid denoising device and method allowable for adjusting denoising degree. The hearing-aid denoising device allowable for adjusting denoising degree comprises an spectrum estimation module, a spectrum mean value module, an endpoint detection module, a Wiener filtering module, a denoising degree setting module and an inverse fast fourier transform module, wherein the endpoint detection module is used for determining whether a current frame is a voice frame, a sub-voice frame, a sub-noise frame or a noise frame and correspondingly setting marks; the Wiener filtering module is used for performing Wiener filtering operation and obtaining Wiener filtering coefficient; the denoising degree setting module is used for determining noise reduction degree according to the marks of the endpoint detection module and the Wiener filtering coefficient of the Wiener filtering module; the inverse fast fourier transform module is used for converting a frequency domain of a processed signal to a time domain so as to obtain a denoised signal. By means of the hearing-aid denoising device and method allowable for adjusting denoising degree, a user can control noise strength suppression on the basis of independent choice, and thereby, operating flexibility and comfortable experience levels of the user can be improved.
Owner:深圳市微纳感知计算技术有限公司
Three-stable state stochastic resonance detection method for weak signals in color noise
InactiveCN107871109AGood stochastic resonanceImprove output signal-to-noise ratioCharacter and pattern recognitionPulse characteristicsStochastic resonance
The invention provides a three-stable state stochastic resonance detection method for weak signals in color noise and belongs to the field of signal processing. A fourth-order Runge-Kutta method and aself-adaptive optimizing algorithm are utilized, SNR gain is selected as an measurement index, influence on system SNR gain by three-stable system parameters a, b and c and D is studied, and then a high frequency weak signal detection method and square wave detection are disclosed. Finally, the signal detection is realized. Experiments prove that the SNR gain change in a non-linear manner along with a, increases first and decreases then and finally approaches zero gradually; increases first and decreases then along with parameter b; increases first and decreases then along with parameter c ina single peak change form; and, being indicative of pulse characteristics, increases rapidly first along with noise strength D. Therefore, low frequency weak signals can be detected well. At the sametime, the method achieves the same effect when being applied to high frequency weak signal detection with parameter compensation. The method studies a more universal and generalized stochastic resonance system and significant to weak signal detection in engineering application.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Signal quality estimation and control system
Owner:MIDDLESEX SAVINGS BANK
Random resonant current weak information identification method based on linear searching strategy
ActiveCN108108672AImprove the output signal-to-noise ratioAchieving Adaptive Stochastic ResonanceCharacter and pattern recognitionSystem optimizationSignal-to-quantization-noise ratio
The invention provides a random resonant current weak information identification method based on a linear searching strategy. A signal-to-noise ratio is used as a condition for generating random resonance by a control system, and an advantage of maximizing the output signal-to-noise ratio of a noise strength control system is realized. Furthermore a maximal signal-to-noise ratio max(SNR) is used as a system optimization target function. Through estimating a weight function of a system structure parameter a and a noise strength D in each iteration process, and then correcting the weight function in an iteration process, the system finally outputs the maximal signal-to-noise ratio, thereby improving calculating capability in determining the system structure parameter through optimizing the signal-to-noise ratio (SNR), and realizing adaptive random resonance of the current signal. Because system searching difficulty and weight function complexity are reduced in an iteration process, calculation time is reduced and the method is particularly suitable for periodical signal detection of the current.
Owner:XI AN JIAOTONG UNIV
Apparatus for detecting positions of wheels of vehicle and apparatus for detecting tire inflation pressure using the same
InactiveUS20090015393A1Raise resistance against strong noisePreventing apparatusTyre measurementsTransceiverTransducer
An apparatus for detecting positions of wheels of a vehicle is provided. In the apparatus, a triggering signal is transmitted from the body side to each transceiver mounted at each wheel. In each transceiver, the strength of the received triggering signal is measured and formatted into a frame of data to be transmitted to a receiver mounted to the vehicle body. The strength of the triggering signal is used to detect wheel positions by determining that each transducer is disposed at which wheel. The receiver determines if there is a reply of the flame of data containing the strength when the triggering device transmits the triggering signal. When no replay comes from the transceiver, the strength of noise is measured in the transceiver in response to a command from the receiver. When the noise strength is less than a threshold, the receiver commands an alarm member to issue alarm.
Owner:DENSO CORP
Image data processing systems for hiding secret information and data hiding methods using the same
InactiveUS20110051995A1High decoding rateError diffusionCharacter and pattern recognitionVisual presentationError diffusionComputer vision
A system for hiding secret data in halftone images is disclosed. The system includes an image input module, a halftoning processing module and an image output module. The image input module reads an original image data and a secret image data. The halftoning processing module is coupled to the image input module and receives the original image data and the secret image data, performs a first error diffusion process to the original image to generate a first halftone image and performs a second error diffusion process to the original image data and the secret image data to generate a second halftone image. The image output image module is coupled to the halftoning processing module and outputs the first halftone image and the second halftone image, wherein the second error diffusion process comprises adding or subtracting a variable noise strength to or from each pixel of the secret image.
Owner:NAT TAIWAN UNIV OF SCI & TECH
Spectral measurement system and measurement method
InactiveCN106841118AAccurate collectionGuaranteed accuracySpectrum investigationScattering properties measurementsLighting spectrumLED lamp
The invention discloses a spectral measurement system and a measurement method. The system comprises a micro spectrometer for acquiring spectrum of a sample to be measured through an acquiring light path and performing filtering and light splitting through a filter, a standard reflecting plate for reflecting visible light spectrum energy to obtain initial spectrum information, and a mobile terminal which is provided with an LED lamp and a camera and is used for lighting the sample to be measured, obtaining the initial reference spectrum intensity, acquiring dark noise strength of a camera and the spectrum intensity of the sample to be measured, and then obtaining the spectrum reflectivity of the sample to be measured according to the initial reference spectrum intensity, the dark noise strength, and the spectrum intensity of the sample to be measured. With the adoption of the system, the spectrum data with the same standard can be acquired under any different acquiring environments, so that the measuring adaptability is improved, and moreover, the spectrum data accuracy and stability can be effectively ensured.
Owner:TSINGHUA UNIV
Method and system for sharing a signal received by an antenna
InactiveUS20110263270A1Satellite radio beaconingAntenna detailsManufacturing cost reductionUltrasound attenuation
Described are a method, system, and mobile communication device for sharing a signal received by an antenna. A signal, such as a signal sent from a global positioning system, is received by the antenna. An amplifier is then used to generate an amplified signal. The amplifier is located an attenuation distance away from a noise source. The amplified signal is divided into a first divided signal and a second divided signal, which are respectively transmitted to first and second signal utilization modules. While being transmitted from the antenna to the first and second signal utilization modules, the signal suffers propagation losses. While locating the amplifier remote from the noise source decreases noise strength, which positively contributes to signal-to-noise ratio, it also increases propagation losses, which negatively contributes to signal-to-noise ratio. The method, system and mobile communication device are designed such that this positive contribution exceeds this negative contribution, resulting in an overall benefit to signal-to-noise ratio. Also beneficially, sharing the signal allows one antenna to be used for both signal utilization modules, lowering manufacturing costs and saving space in the mobile communication device.
Owner:PSION
Method and system for digital noise reduction of scaled compressed video pictures
ActiveUS8842741B2Television system detailsColor television with pulse code modulationPattern recognitionGraphics
In a video processing device, scale of a video image is detected for vertical and horizontal directions based on pixel information, for example, per pixel vertical and horizontal gradients. Gradients are utilized or discarded based on picture format, standard deviation of luma levels and pixel location relative to black border edges, graphics and / or overlaid content. Mosquito noise filters are adapted based on scale and / or noise strength. Median and / or linear filter results are selected based on a weakest, a strongest and / or a blended result. Horizontal and vertical operations are performed separately for edge detection, edge strength determination, filtering and filter correction control. Horizontal and vertical block grid spacing and grid shift are determined. Block noise strength is determined. Block noise filters are configured based on scaling and / or noise strength. Filter corrections are limited based on block noise strength. Noise reduction results may be blended to generate a pixel correction value.
Owner:AVAGO TECH INT SALES PTE LTD
Face approaching action recognition method based on capacitive touch screen
The invention provides a face approaching action recognition method based on a capacitive touch screen. Whether the face approaching action exists or not can be judged by a manner that a detecting inductor connected with the capacitive touch screen is utilized to detect noise changes and noise strength on the capacitive touch screen. Compared with a common scheme adopting an infrared sensor for inducting, the face approaching action recognition method has the advantages that the face approaching action is judged through a TP capacitive far field coupling, in terms of the structure, the number of IR sensing circuits on a mainboard can be reduced, and special printing ink is not needed by a glass cover plate. The face approaching action recognition method is suitable for a mutual capacitance type touch screen and a self-capacitance type touch screen, the application range is wide, and application prospect is good.
Owner:SHENZHEN ZHILING WEIYE TECH
Control method and control device for audio playing sound volume, storage medium and mobile terminal
ActiveCN107371102AControl playback volumeSignal processingLoudspeaker signals distributionStart timeComputer science
An embodiment of the invention discloses a control method and a control device for audio playing sound volume, a storage medium and a mobile terminal. The method comprises the steps of when triggering of an audio playing event is detected, acquiring noise related information of an outer environment in which the mobile terminal exists in a first preset time period, wherein the noise related information comprises at least one selected from noise strength, noise source, noise type and the current position of the mobile terminal; determining a sound volume adjustment value in a second preset time period according to the noise related information in the first preset time period, wherein the starting time point of the second preset time period is same with the ending time point of the first preset time period; and adjusting the audio playing sound volume in the second preset time period according to the sound volume adjustment value. According to the control method, the control device, the storage medium and the mobile terminal, the audio playing sound volume of the mobile terminal can be reasonably controlled.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Monitoring device for construction sites
InactiveCN108279038AIncrease flexibilitySave electricityMeasurement devicesLED displayCommunication device
The invention discloses a monitoring device for construction sites. The monitoring device comprises a base. A storage battery and a controller are arranged in an inner cavity of a battery case. A vertical rod is fixedly mounted on the upper surface of the battery case. An LED display screen is mounted on the vertical rod through a mounting frame fixedly. A solar photovoltaic power generation panelgroup is mounted on the upper side of the LED display panel through a mounting frame fixedly, and is connected with the storage battery through a guide line electrically. A groove is formed in the top end of the vertical rod. A rotating mechanism is mounted in the groove fixedly. A rotating rod is arranged on the rotating mechanism. A noise sensor, a dust detector and a wireless communication device are mounted on the rotating rod through a mounting base. A shielding cover is arranged at the top end of the rotating rod. The monitoring device has the advantages that solar energy can be converted into electric energy to be stored in the storage battery, erection of electric wires is not needed, noise strength and dust concentration can be transmitted out, remote monitoring can be realized,and the monitoring device can detect different orientations.
Owner:FOSHAN CITY SHUNZHI ENVIRONMENTAL PROTECTION TECH CO LTD
Apparatus and method of estimating scale ratio and noise strength of encoded image
InactiveUS8320700B2Accurately and efficiently reducedCharacter and pattern recognitionDigital video signal modificationPrior informationBlock effect
An apparatus and method for estimating scale ratio and noise strength of an encoded image includes an edge detection unit, a projection histogram calculation unit, a distance histogram calculation unit, a scale ratio estimation unit, a block boundary determination unit, and a noise strength estimation unit. Compressed noise, such as a block effect, included in an image can be efficiently reduced without prior information about the image.
Owner:CHUNG ANG UNIV IND ACADEMIC COOP FOUND
De-noising method and device of video sequence
ActiveCN102685370AEfficient removalAvoid the problem of suboptimal noise removalTelevision system detailsColor television detailsPattern recognitionVideo sequence
The invention discloses a de-noising method and a de-noising device of a video sequence. The de-noising method comprises the following steps of: firstly, decomposing the video sequence into a low-rank part and a sparse part; decomposing the sparse part into a video self-characteristic part and a noise part; and determining the de-noised video sequence according to the low-rank part and the video self-characteristic part. The technical scheme provided by the embodiment can effectively remove noises in the video sequence; and a process of removing the noises in the video sequence does not need to accurately estimate the noise strength, so that the problem that the noise removing effect is not ideal, caused by estimation errors of the noise strength, is solved.
Owner:UNIV OF SCI & TECH OF CHINA
Intelligent telephone amplifier for eliminating feedback whistle, and suppressing interference noise
InactiveCN101478588AEliminate feedback howlingEliminate buzzing and howlingSubstation speech amplifiersTransducer acoustic reaction preventionHeadphonesAmplifier
The invention provides an intelligent telephone repeater capable of eliminating feedback howling, inhibiting disturbance noise and enabling receiving and transmitting signals simultaneously asymmetric amplification belonging to the communication appliance field. The repeater comprises a receiving end and a transmitting end. A repeater transmitting level sampling circuit and a receiving level sampling circuit are accessed to an asymmetry function intelligent control module circuit through a level comparing module, connected to the telephone main machine transmitting end through a transmitting channel amplifying circuit and feedbacked to the transmitting level sampling circuit; the asymmetry function intelligent control module circuit is connected to a telephone handle earphone through a receiving channel amplifying circuit and a power amplifying circuit and feedbacked to the receiving level sampling circuit. The invention completely eliminates the singing and howling in the communication, enables the amplification of receiving channel to vary from 1 to 200 and that of the transmitting channel corresponding from 100 to 1. The invention automatically inhibits briefness sudden type and constant stable noise, and automatically changes the telephone to be a direct connection state when the noise strength is too large.
Owner:盛韦 +2
Image data processing systems for hiding secret information and data hiding methods using the same
InactiveUS8351644B2Character and pattern recognitionImage data processing detailsData processing systemError diffusion
A system for hiding secret data in halftone images is disclosed. The system includes an image input module, a halftoning processing module and an image output module. The image input module reads an original image data and a secret image data. The halftoning processing module is coupled to the image input module and receives the original image data and the secret image data, performs a first error diffusion process to the original image to generate a first halftone image and performs a second error diffusion process to the original image data and the secret image data to generate a second halftone image. The image output image module is coupled to the halftoning processing module and outputs the first halftone image and the second halftone image, wherein the second error diffusion process comprises adding or subtracting a variable noise strength to or from each pixel of the secret image.
Owner:NAT TAIWAN UNIV OF SCI & TECH
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