Patent application number | Description | Published |
20100092000 | APPARATUS AND METHOD FOR NOISE ESTIMATION, AND NOISE REDUCTION APPARATUS EMPLOYING THE SAME - Provided are an apparatus and method for estimating noise and a noise reduction apparatus employing the same. The noise estimation apparatus estimates noise by blocking audio signals from a direction of a target sound source from received audio signals, and compensating for distortions from directivity gains of a target sound blocker blocking the audio signals from the target sound source. | 04-15-2010 |
20100110834 | APPARATUS AND METHOD OF DETECTING TARGET SOUND - An apparatus and method of voice activity detection (VAD) are disclosed. To detect a target sound, a target sound detecting apparatus calculates the phase difference corresponding to each frequency component from a plurality of sound signals converted in frequency domain, calculates a characteristic value indicating possibility that the phase difference of the frequency component is within an allowable phase difference range of target sound calculated based on a direction angle of the target sound, and detects the presence and/or absence of target sound using the characteristic value. | 05-06-2010 |
20100119079 | APPRATUS AND METHOD FOR PREVENTING NOISE - Provided are an apparatus and method for preventing noise. The apparatus estimates a noise signal from a signal transformed into a frequency domain, uses the estimated noise signal to estimate the amplitude of the frequency-domain signal according to a frequency band, and then calculates a phase difference according to a frequency band and eliminates or prevents noise from the amplitude-estimated frequency-domain signal based on the calculated phase difference according frequency band. | 05-13-2010 |
20100254539 | APPARATUS AND METHOD FOR EXTRACTING TARGET SOUND FROM MIXED SOURCE SOUND - A technology for eliminating or reducing interference sound from a sound signal to extract target sound is provided. Interference sound is modeled using training noise, and mixed source sound is separated using the modeled interference sound. The mixed source sound is separated into target sound and interference sound using a basis matrix of the modeled interference sound. | 10-07-2010 |
20110051956 | APPARATUS AND METHOD FOR REDUCING NOISE USING COMPLEX SPECTRUM - An apparatus and method reduce noise in a complex spectrum domain to extract a target signal from input signals containing noise and target speech. Noise estimation may be performed through a filter with a filter learning coefficient that is updated according to a prior-signal-to-noise ratio (prior-SNR). Also, noise estimation accuracy may be improved by using confidential weighted scores. The target signal may be extracted by representing candidates of the target signal as at least two circles in the complex spectrum domain using the estimated noise and then geometrically calculating the intersections of the circles. | 03-03-2011 |
20110075859 | APPARATUS FOR GAIN CALIBRATION OF A MICROPHONE ARRAY AND METHOD THEREOF - An apparatus and method for calibrating gain difference between microphones included in a microphone array are provided. In the gain calibrating apparatus, weights for each frequency component of the acoustic signals, which have been converted into the signals in the frequency domain are calculated. The weights are used to calibrate the acoustic signals such that the plurality of acoustic signals each have the same amplitude while the acoustic signals maintain their individual phase. The amplitudes of the acoustic signals are calibrated by use of the calculated weights. The gain calibrating apparatus calibrates gain in real time while calculating weights for frequency components of the frame of acoustic signals in real time. | 03-31-2011 |
20110235822 | APPARATUS AND METHOD FOR REDUCING REAR NOISE - An apparatus and method for removing noise are provided. The apparatus includes an acoustic signal input unit configured to comprise three or more microphones including a first microphone as a reference microphone, a second microphone disposed at a position asymmetrical to the first microphone, and a third microphone disposed at a position symmetrical to the first microphone, and an acoustic signal processing unit configured to remove rear noise using acoustic signals received from the first microphone, the second microphone, and the third microphone. | 09-29-2011 |
20120212618 | METHOD OF ULTRASONIC BEAMFORMING AND APPARATUS THEREFOR - An ultrasonic beamforming method is provided. The ultrasonic beamforming method includes dividing an input ultrasonic signal into a plurality of regions in an observation space, calculating a weight value for each of the plurality of regions, calculating a pixel weight value for each pixel using the weight value for each region, and calculating a beamforming value using the pixel weight value. | 08-23-2012 |
20120269408 | METHOD OF GENERATING IMAGE, APPARATUS FOR PERFORMING THE SAME, DIAGNOSIS SYSTEM, AND MEDICAL IMAGE SYSTEM - A diagnosis image generation apparatus is provided. The diagnosis image generation apparatus includes a low resolution image signal synthesis unit configured to synthesize each of a plurality of low resolution image signals by using a signal reflected from a subject, a weight calculation unit configured to calculate a weight, which is used to synthesize a high resolution image signal, with a signal value which corresponds to each of positions of some pixels among a plurality of signal values corresponding to respective positions of a plurality of pixels forming each of the synthesized low resolution image signals, and a high resolution image signal synthesis unit configured to synthesize the high resolution image signal by applying the calculated weight to each of the low resolution image signals. | 10-25-2012 |
20120275261 | BEAMFORMER, DIAGNOSTIC SYSTEM, MEDICAL IMAGE SYSTEM, AND METHOD FOR DISPLAYING DIAGNOSTIC IMAGE - A beamformer for forming a reception beam using a multichannel signal reflected from a subject is provided. The beamformer includes a signal generator that may generate a plurality of signals to which different apodization functions are applied, with respect to the multichannel signal, an estimator that may estimate a signal predominant component and a noise predominant component from the plurality of signals, a weight calculator that may calculate a weight to be applied to the signal predominant component according to each of channels, using the estimated signal predominant component and the estimated noise predominant component, and a weight applier that may apply the calculated weight to the estimated signal predominant component. | 11-01-2012 |
20130231563 | APPARATUS AND METHOD FOR GENERATING ULTRASONIC IMAGE - An apparatus and method for generating an ultrasonic image are provided. The apparatus includes a transceiver configured to transmit an ultrasonic signal to an object, and receive an echo signal. The apparatus further includes a beam former configured to perform beamforming on the received echo signal to generate image data. The apparatus further includes a point spread function (PSF) estimator configured to update a PSF of the ultrasonic signal at each multiscale level to update the image data. | 09-05-2013 |
Patent application number | Description | Published |
20120271144 | METHOD AND APPARATUS FOR GENERATING DIAGNOSIS IMAGE, DIAGNOSIS SYSTEM, AND MEDICAL IMAGE SYSTEM FOR PERFORMING THE METHOD - A method of generating a diagnosis image includes receiving signals reflected from a subject; calculating a beamforming coefficient using the received signals; synthesizing each of the plurality of low resolution images using the calculated beamforming coefficient; and synthesizing a high resolution image using the synthesized plurality of low resolution images. | 10-25-2012 |
20130090559 | DIAGNOSTIC IMAGE GENERATING APPARATUS, MEDICAL IMAGE SYSTEM, AND BEAMFORMING METHOD - A diagnostic image generating apparatus, a medical image system, and a beamforming method are provided. The diagnostic image generating apparatus includes a transmitting unit configured to transmit a modulated transmission signal to a subject, a reception beamforming unit configured to form a reception beam by beamforming echo signals reflected from the subject, a point spread function (PSF) estimating unit configured to estimate a PSF for each region according to the formed reception beam, a filtering unit configured to filter the formed reception beam according to the estimated PSF, and a diagnostic image generating unit configured to generate a diagnostic image according to the filtered reception beam. | 04-11-2013 |
20130131514 | BEAMFORMING METHOD, BEAMFORMING APPARATUS, AND MEDICAL IMAGING SYSTEM PERFORMING THE BEAMFORMING METHOD - A beamforming apparatus includes a storage for storing a plurality of basis vectors obtained from a beamforming coefficient of a previously-measured echo signal; a weight calculator for calculating a weight to be applied to an echo signal reflected from a target; and a synthesizer for applying the weight to the echo signal reflected from the target and synthesizing signals to which the weight is applied. | 05-23-2013 |
20140031689 | IMAGE PROCESSING MODULE, ULTRASONIC IMAGING APPARATUS USING THE IMAGE PROCESSING MODULE, AND ULTRASONIC IMAGE GENERATION METHOD USING THE ULTRASONIC IMAGING APPARATUS - An image processing module includes a beamforming unit configured to provide a beamformed signal based on an input signal; a point spread function (PSF) database comprising at least one two-dimensional point spread function obtained based on at least one situational variable of the beamformed signal; and an image generation unit configured to select at least one two-dimensional point spread function from the point spread function database and perform deconvolution using the beamformed signal and the selected at least one two-dimensional point spread function to generate an image of a target portion of an object. | 01-30-2014 |
20140121516 | METHOD OF DETERMINING BEAMFORMING COEFFICIENT, BEAMFORMING METHOD AND ULTRASONIC IMAGING APPARATUS - Disclosed herein are a beamforming method, a method of determining a beamforming coefficient, and an ultrasonic imaging apparatus. The beamforming method includes radiating a target object with ultrasonic waves and receiving a plurality of ultrasonic signals reflected from the target object, acquiring beamforming computation results of some of the plurality of received ultrasonic signals and determining a beamforming coefficient candidate group based on a beamforming computation result of the some of the received ultrasonic signals, acquiring beamforming computation results of the plurality of received ultrasonic signals or the some of the received ultrasonic signals by applying beamforming coefficients of the beamforming coefficient candidate group and selecting at least one beamforming coefficient from the beamforming coefficient candidate group based on the beamforming computation results of the plurality of ultrasonic signals, and beamforming the plurality of ultrasonic signals using the selected at least one beamforming coefficient as a weight. | 05-01-2014 |
20140198621 | BEAMFORMING MODULE, ULTRASONIC IMAGING APPARATUS USING THE SAME, BEAMFORMING METHOD USING THE BEAMFORMING MODULE, AND METHOD OF CONTROLLING THE ULTRASONIC IMAGING APPARATUS USING THE BEAMFORMING MODULE - A beamforming module includes a conversion unit configured to convert an input signal to generate a converted signal using at least one conversion function, a weight calculator configured to calculate a converted signal weight as a weight for the converted signal, and a synthesizer configured to generate a result signal using the converted signal and the converted signal weight. | 07-17-2014 |
20140219050 | IMAGING APPARATUS, ULTRASONIC IMAGING APPARATUS, METHOD OF PROCESSING AN IMAGE, AND METHOD OF PROCESSING AN ULTRASONIC IMAGE - A method of processing an image, including estimating a point spread function (PSF) of an acquired image, and performing image restoration on the acquired image using the estimated PSF based on a generalized Gaussian model using inverse filter frequency domain so as to perform image restoration at high speed and to prevent a halo effect. The method provides high speed processing while preventing a halo effect. The apparatus includes an ultrasonic imaging apparatus including: an ultrasonic probe to irradiate an object with ultrasonic waves and to receive ultrasonic echo waves reflected from the object; a beamformer configured to perform beam forming based on the ultrasonic echo waves received by the ultrasonic probe; an image restorer configured to restore the image beam formed by the beamformer based on a generalized Gaussian model; and an postprocessor configured to suppress noise and aliasing which are produced in the process of restoring the image. | 08-07-2014 |
20140330126 | ULTRASONIC IMAGING APPARATUS AND CONTROL METHOD THEREOF - An ultrasonic probe includes a multi-dimensionally arrayed transducer, a matching layer, and a backing layer. The transducer includes element groups having different focal distances and simultaneously transmitting ultrasonic signals toward an object. According to the ultrasonic imaging apparatus using the multi-dimensionally arrayed transducer, a multi-focus transmission is performed. Thus, the multi-focus ultrasonic image may be acquired within a short period of time, thereby increasing frame rates, and a high-quality image in which all areas are focused may be quickly acquired. | 11-06-2014 |
20140336508 | IMAGE PROCESSING UNIT, ULTRASONIC IMAGING APPARATUS, AND IMAGE GENERATION METHOD FOR THE SAME - An image processing unit includes an input unit configured to receive image data of at least one image, a plurality of filters configured to filter the image data to generate a plurality of filtered images, and an image generator configured to compare the plurality of filtered images in a comparison to select at least one pixel from the plurality of filtered images according to results of the comparison. | 11-13-2014 |
20140336509 | ULTRASONIC IMAGING APPARATUS AND IMAGE DISPLAY METHOD THEREOF - Disclosed herein are an ultrasonic imaging apparatus and an image display method thereof. The ultrasonic imaging apparatus includes an ultrasonic probe configured to transmit ultrasonic signals toward an object and to receive ultrasonic signals reflected by the object, a beamformer configured to perform beamforming based on the ultrasonic signals received by the ultrasonic probe, and an image processor configured to generate an ultrasonic image of an examined region within the object based on the beamforming, to extract characteristic information which relates to the examined region from the generated ultrasonic image, and to judge whether or not the examined region coincides with a target region based on the extracted characteristic information, thus facilitating a determination as to with which region within the object the examined region corresponds based on various pieces of the characteristic information of the examined region extracted via analysis of the ultrasonic image. | 11-13-2014 |
20150015720 | IMAGE PROCESSOR, ULTRASONIC IMAGING DEVICE, AND IMAGE PROCESSING METHOD - Disclosed herein are an image processor, an ultrasonic imaging device, and an image processing method. The image processor includes a signal input unit configured to receive an input signal on a channel, a weighting coefficient database configured to store a weighting coefficient wherein the weighting coefficient is part of a weighting coefficient subgroup, and a processor configured to select the weighting coefficient subgroup from the weighting coefficient database, and convert the input signal by selecting and using the weighting coefficient from the weighting coefficient subgroup. | 01-15-2015 |
20150016215 | IMAGE PROCESSING MODULE, ULTRASOUND IMAGING APPARATUS, IMAGE PROCESSING METHOD, AND CONTROL METHOD OF ULTRASOUND IMAGING APPARATUS - An image processing module includes an input unit, a weight operator, and a synthesizer. The input unit is configured to receive a plurality of input signals of a plurality of channels. The weight operator is configured to calculate at least one weight to be applied to each channel based on at least one converted signal. The at least one converted signal is acquired by converting at least one input signal among the plurality of input signals of each channel, or by converting a synthesized input signal of the plurality of input signals of each channel. The synthesizer is configured to synthesize the plurality of input signals of the plurality of channels using the weight. | 01-15-2015 |