Patent application number | Description | Published |
20080219471 | SIGNAL PROCESSING METHOD AND APPARATUS, AND RECORDING MEDIUM IN WHICH A SIGNAL PROCESSING PROGRAM IS RECORDED - A signal processing method for converting a signal received via a transmission path or read from a storage medium into a first audible signal, and suppressing a noise other than a desired signal contained in the first audible signal based on predetermined audio quality adjustment information, comprising steps of: in suppressing a noise other than a desired signal contained in the first audible signal to generate an enhanced signal, receiving audio quality adjustment information for adjusting audio quality; and adjusting audio quality of the enhanced signal using the audio quality adjustment information | 09-11-2008 |
20080219473 | SIGNAL PROCESSING METHOD, APPARATUS AND PROGRAM - The present invention is characterized in performing noise suppression immediately before or after mixing signals received from a plurality of terminals. Thus, in multi-point connection for a plurality of terminal devices, a mixed signal can be supplied with high sound quality to a receiver terminal, regardless of the presence and performance of the noise suppression function in a transmitter terminal. | 09-11-2008 |
20090043423 | Information processing system, method of processing information, and program for processing information - An information processing system, method, program and robot is provided. The system includes analysis means for analyzing a message and determining the most effective direction for transmitting the message. The analysis means also analyzes received messages and determines the most effective direction for receiving the message. Motion control means turn toward the most effective direction for transmitting a message or receiving a message. The system includes information reproducing means for reproducing the message and a sensor for receiving a message. | 02-12-2009 |
20090073040 | ADAPTIVE ARRAY CONTROL DEVICE, METHOD AND PROGRAM, AND ADAPTIVE ARRAY PROCESSING DEVICE, METHOD AND PROGRAM - [Object] By enabling accurate coefficient update, a high-quality array processing output which is less influenced by frequency characteristics and incoming directions of input signals control can be acquired, irrespective of the frequency characteristics and incoming direction of the input signals. [Achieving Means] Identification information of a target signal and interference by amplitude is corrected according to identification information of the target signal and the interference by phase, and with use of the correction result, identification of the target signal and the interference is performed. More specifically, an identification information generation section according to phase, a correction signal generation section, and a correction section are provided. | 03-19-2009 |
20090086578 | ADAPTIVE ARRAY CONTROL DEVICE, METHOD AND PROGRAM, AND ADAPTIVE ARRAY PROCESSING DEVICE, METHOD AND PROGRAM USING THE SAME - [Object] To provide an adaptive array control method, device, and program, and an adaptive array processing method, device, and program, capable of performing accurate coefficient update control independent of frequency characteristics and incoming directions of signals. | 04-02-2009 |
20090121934 | ADAPTIVE ARRAY CONTROL DEVICE, METHOD AND PROGRAM, AND ADAPTIVE ARRAY PROCESSING DEVICE, METHOD AND PROGRAM - [Object] To provide an adaptive array controlling method, a device, and a program, and an adaptive array processing method, a device, and a program, which are less influenced by frequency characteristics of input signals and directions of a target signal and interference, and capable of performing accurate coefficient update. | 05-14-2009 |
20090196434 | METHOD, APPARATUS, AND COMPUTER PROGRAM FOR SUPPRESSING NOISE - A method, an apparatus, and a computer program, which can suppress a low frequency range component with a small amount of calculation, and can achieve a noise suppression of high quality, are provided. The noise superposed in a desired signal of an input signal is suppressed by converting the input signal to a frequency domain signal; correcting an amplitude of the frequency domain signal to obtain an amplitude corrected signal; obtaining an estimated noise by using the amplitude corrected signal; determining a suppression coefficient by using the estimated noise and the amplitude corrected signal; and weighting the amplitude corrected signal with the suppression coefficient. | 08-06-2009 |
20090207955 | Adaptive Digital Filter, FM Receiver, Signal Processing Method, and Program - The adaptive digital filter of the present invention includes: a filter unit that includes a plurality of multipliers ( | 08-20-2009 |
20090296958 | NOISE SUPPRESSION METHOD, DEVICE, AND PROGRAM - It is possible to provide a noise suppression method, device, and program capable of realizing a sound image positioning of an output side corresponding to an input side with a small calculation amount. The device includes a common suppression coefficient calculation unit for receiving conversion outputs from a plurality of channels and calculating a suppression coefficient common to the channels. | 12-03-2009 |
20100010808 | Method, Apparatus and Computer Program for Suppressing Noise - To provide a noise suppressing method and apparatus capable of achieving high-quality noise suppression using a lower amount of operations. Noise contained in an input signal is suppressed by transforming the input signal into frequency-domain signals; integrating bands of the frequency-domain signals to determine integrated frequency-domain signals; determining estimated noise based on the integrated frequency-domain signals; determining spectral gains based on the estimated noise and said integrated frequency-domain signals; and weighting said frequency-domain signals by the spectral gains. | 01-14-2010 |
20100171662 | ADAPTIVE ARRAY CONTROL DEVICE, METHOD AND PROGRAM, AND ADAPTIVE ARRAY PROCESSING DEVICE, METHOD AND PROGRAM USING THE SAME - [Object] To provide an adaptive array control device, method, and program adapted to be able to output an enhanced target signal by precisely carrying out a coefficient update control of a plurality of signals input from a group of sensors arranged in an array, the coefficient update control being less influenced by the frequency characteristics of the signals and directions of a target signal and interference. | 07-08-2010 |
20100211382 | Dereverberation Method, Apparatus, and Program for Dereverberation - A dereverberation device includes a reverberation estimation unit for estimating a later reflection component by using information on an impulse response from a signal source to an observation point, a noise estimation unit, and a mixing unit. As a result, it is possible to obtain a high-quality dereverberated signal with a small calculation amount even in a noisy environment. | 08-19-2010 |
20100217586 | SIGNAL PROCESSING SYSTEM, APPARATUS AND METHOD USED IN THE SYSTEM, AND PROGRAM THEREOF - Provided is a signal separation system including a rendering unit which receives a first and a second input signal and positions the first input signal according to rendering information. | 08-26-2010 |
20100217587 | SIGNAL PROCESSING METHOD AND DEVICE - A signal processor includes: a first adaptive filter that takes a first signal as input and generates a first pseudo signal; a first subtractor that subtracts the first pseudo signal from a second signal to supply a first differential signal as output; a second adaptive filter that takes the first signal as input to generate a second pseudo signal; a second subtractor that subtracts the second pseudo signal from the second signal to supply a second differential signal as output; a first step size control circuit that generates a first step size used in updating the first adaptive filter in accordance with the relation between the second pseudo signal and the second differential signal; and a second step size control circuit that generates a second step size used in updating the second adaptive filter in accordance with the relation between the first signal and the second signal. | 08-26-2010 |
20100223311 | PARTICULAR SIGNAL CANCEL METHOD, PARTICULAR SIGNAL CANCEL DEVICE, ADAPTIVE FILTER COEFFICIENT UPDATE METHOD, ADAPTIVE FILTER COEFFICIENT UPDATE DEVICE, AND COMPUTER PROGRAM - By using the adaptive filter, the reference input signal is processed so as to identify a pseudo-signal of a particular signal to be deleted. The pseudo-signal is subtracted from the mixture containing a target signal inputted from a microphone, the particular signal to be deleted, and a noise so as to obtain an error signal. A stationary noise is estimated to obtain a stationary noise estimated value. A non-stationary noise is estimated to obtain a non-stationary noise estimated value. The stationary noise estimated value is mixed with the non-stationary estimated value to obtain a mixed noise estimated value. An update amount is calculated according to a correlation value between the error signal and the reference input signal, and the mixed noise estimated value. According to the update amount, a coefficient of the adaptive filter is updated. | 09-02-2010 |
20100283536 | SYSTEM, APPARATUS, METHOD AND PROGRAM FOR SIGNAL ANALYSIS CONTROL, SIGNAL ANALYSIS AND SIGNAL CONTROL - A signal analysis control system is provided with a signal analyzing section for analyzing signals inputted to a transmission section and generating analysis information, and a signal control section for controlling signals inputted to a receiving section by using the analysis information. | 11-11-2010 |
20110002225 | SIGNAL ANALYSIS/CONTROL SYSTEM AND METHOD, SIGNAL CONTROL APPARATUS AND METHOD, AND PROGRAM - A signal analysis/control system includes: a signal analysis unit which analyzes an input signal of a transmission unit and generates analysis information; and a signal control unit which controls the input signal of a reception unit by using the analysis information. Thus, the signal analysis is performed in the transmission unit. This reduces the calculation amount concerning the signal analysis in the reception unit. Furthermore, the reception unit can control each of the constituent elements of the input signal according to the signal analysis information obtained in the transmission unit. | 01-06-2011 |
20110019761 | SYSTEM, APPARATUS, METHOD, AND PROGRAM FOR SIGNAL ANALYSIS CONTROL AND SIGNAL CONTROL - Disclosed is a signal control method that is characterized by receiving a first signal, a second signal comprising multiple components, component information indicating the relationship between the components, and analysis control information comprising information indicating the relationship between the components and the second signal. The signal control method is further characterized by controlling the first signal or the second signal on the basis of the components and the analysis control information. | 01-27-2011 |
20110175676 | SIGNAL PROCESSING METHOD, SIGNAL PROCESSING DEVICE, AND SIGNAL PROCESSING PROGRAM - Provided is a signal processing method which reduces a plurality of echoes by receiving a plurality of reception signals and subtracting a pseudo echo generated by a plurality of adaptive filters which input the reception signals from a plurality of echoes generated by the reception signals. At least one of the reception signals is delayed to generate a delayed reception signal. The reception signal and the delayed reception signal are inputted to the adaptive filters to generate a pseudo echo. The frequency of inputting the reception signal and the delayed reception signal to the adaptive filters is controlled in accordance with the sensitivity of a localization change of the reception signals. | 07-21-2011 |
20110176688 | SIGNAL PROCESSING METHOD, SIGNAL PROCESSING DEVICE, AND SIGNAL PROCESSING PROGRAM - Provided is a signal processing method which receives a plurality of reception signals and subtracts pseudo-echoes generated by a plurality of adaptive filters which input the reception signals, from a plurality of echoes generated by the reception signals, thereby reducing the echoes. The method delays two or more of the reception signals so as to generate delayed reception signals and inputs the reception signals and the delayed reception signals to the adaptive filters so as to generate pseudo-echoes. | 07-21-2011 |
20120033725 | SIGNAL PROCESSING SYSTEM AND METHOD FOR CALIBRATING CHANNEL SIGNALS SUPPLIED FROM AN ARRAY OF SENSORS HAVING DIFFERENT OPERATING CHARACTERISTICS - In a signal processing system, a set of channel signals from an array of sensors of different operating characteristics are processed in calibration circuitry that calculates individual average values of the channel signals and calculates an average of the individual average values of channel signals as a reference value. Reciprocal calculators calculate reciprocal values of the individual average values of the channel signals. Scaling circuitry scales the reciprocal values by the reference value to produce a set of amplitude calibration signals and scales the channel signals by the calibration signals respectively. As a result, the channel signals are normalized by their own average values and scaled by the reference value to produce a set of calibrated channel signals. | 02-09-2012 |
20120033828 | Signal Processing Method and Apparatus, and Recording Medium in Which a Signal Processing Program is Recorded - A signal processing method for converting a signal received via a transmission path or read from a storage medium into a first audible signal, and suppressing a noise other than a desired signal contained in the first audible signal based on predetermined audio quality adjustment information, comprising steps of: in suppressing a noise other than a desired signal contained in the first audible signal to generate an enhanced signal, receiving audio quality adjustment information for adjusting audio quality; and adjusting audio quality of the enhanced signal using the audio quality adjustment information | 02-09-2012 |
20120189138 | SIGNAL PROCESSING METHOD, SIGNAL PROCESSING APPARATUS, AND SIGNAL PROCESSING PROGRAM - A desired signal is extracted with a higher accuracy from a mixed signal wherein a plurality of signals are mixed. At the time of extracting a first signal from a first mixed signal and a second mixed signal, said first mixed signal and second mixed signal having the first signal and second signal mixed therein, an estimate value of the first signal in the past is obtained as a first estimate value, and an estimate value of the second signal in the past is obtained as a second estimate value. Then, a first isolation signal is generated by subtracting the second estimate value from the first mixed signal, and a second isolation signal is generated by subtracting the first estimate value from the second mixed signal. Then, the signal generated using the first isolation signal and the second isolation signal is outputted as the first signal. | 07-26-2012 |
20120207326 | SIGNAL PROCESSING METHOD, INFORMATION PROCESSING APPARATUS, AND STORAGE MEDIUM FOR STORING A SIGNAL PROCESSING PROGRAM - Provided is a noise suppressing technology capable of suppressing various noises including unknown noises without storing information relating to a large number of noises in advance. Noises in a degraded signal are suppressed and noise information is generated on the basis of a noise suppression result. The noises in the degraded signal are suppressed using the generated noise information. | 08-16-2012 |
20120224708 | INFORMATION PROCESSING APPARATUS, AUXILIARY DEVICE THEREFOR, INFORMATION PROCESSING SYSTEM, CONTROL METHOD THEREFOR, AND CONTROL PROGRAM - Disclosed is a noise suppression technology for suppressing various types of noise including unknown noise without storing a large number of noise information in advance. | 09-06-2012 |
20120224718 | SIGNAL PROCESSING METHOD, INFORMATION PROCESSING APPARATUS, AND STORAGE MEDIUM FOR STORING A SIGNAL PROCESSING PROGRAM - To sufficiently suppress an impact sound in a noisy signal. The impact sound in the noisy signal is suppressed. For this, the impact sound is detected in the noisy signal. It is characterized in that phase information of the detected impact sound is processed by using the phase information of a signal other than the impact sound in the noisy signal so that an amount of change in the phase information is reduced. | 09-06-2012 |
20120268198 | SIGNAL PROCESSING METHOD, INFORMATION PROCESSING APPARATUS, AND STORAGE MEDIUM FOR STORING A SIGNAL PROCESSING PROGRAM - This invention provides a signal processing technique of suppressing various kinds of noise including unknown noise without storing a number of pieces of noise information in advance. To accomplish this, noise information is modified using modification information to obtain modified noise information. The noise in the noisy signal is suppressed using the modified noise information. The modification information is adapted and updated for the result of the step of suppressing. | 10-25-2012 |
20120288115 | Method, Apparatus, and Computer Program For Suppressing Noise - A method, an apparatus, and a computer program, which can suppress a low frequency range component with a small amount of calculation, and can achieve a noise suppression of high quality, are provided. The noise superposed in a desired signal of an input signal is suppressed by converting the input signal to a frequency domain signal; correcting an amplitude of the frequency domain signal to obtain an amplitude corrected signal; obtaining an estimated noise by using the amplitude corrected signal; determining a suppression coefficient by using the estimated noise and the amplitude corrected signal; and weighting the amplitude corrected signal with the suppression coefficient. | 11-15-2012 |
20120290296 | Method, Apparatus, and Computer Program for Suppressing Noise - A method, an apparatus, and a computer program, which can suppress a low frequency range component with a small amount of calculation, and can achieve a noise suppression of high quality, are provided. The noise superposed in a desired signal of an input signal is suppressed by converting the input signal to a frequency domain signal; correcting an amplitude of the frequency domain signal to obtain an amplitude corrected signal; obtaining an estimated noise by using the amplitude corrected signal; determining a suppression coefficient by using the estimated noise and the amplitude corrected signal; and weighting the amplitude corrected signal with the suppression coefficient. | 11-15-2012 |
20130064392 | SINGLE PROCESSING METHOD, INFORMATION PROCESSING APPARATUS AND SIGNAL PROCESSING PROGRAM - A signal processing method includes: analyzing a noisy signal that is supplied as an input signal; generating mixed noise information by mixing a plurality of noise information about a noise to be suppressed based on the result of said analysis of the noisy signal; and suppressing the noise using the mixed noise information. | 03-14-2013 |
20130077802 | SIGNAL PROCESSING METHOD, INFORMATION PROCESSING DEVICE AND SIGNAL PROCESSING PROGRAM - To suppress both noise having an unknown characteristic and noise having a known characteristic,
| 03-28-2013 |
20130191119 | SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING PROGRAM - From a mixed signal in which a first signal and a second signal are mixed, the second signal is removed at low processing cost and without delay. As a result, an estimated first signal which has low residue of the second signal and low distortion is obtained. | 07-25-2013 |
20130197905 | SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING PROGRAM - To achieve sufficient noise cancellation when a reference signal cannot be captured in the proximity of a noise source. | 08-01-2013 |
20130223639 | SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING PROGRAM - The present invention compensates output variability caused by the difference in the performance of and the individual difference between converter devices when processing the signals inputted by means of a converter device, and performs highly-accurate signal processing. | 08-29-2013 |
20130246060 | SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING PROGRAM - The purpose of the present invention is to obtain a higher-quality output signal by performing noise suppression in view of a background sound. The signal processing device disclosed in the present application is provided with suppression means for performing suppression of a second signal by processing a mixed signal in which a first signal and said second signal are contained. Moreover the signal processing device is provided with background sound estimation means for estimating a background sound signal in said mixed signal. Additionally, the signal processing device is provided with restriction means for restricting said suppression of said second signal such that a suppression result outputted by said suppression means does not become smaller than said estimated background sound signal. | 09-19-2013 |
20130282370 | SPEECH PROCESSING APPARATUS, CONTROL METHOD THEREOF, STORAGE MEDIUM STORING CONTROL PROGRAM THEREOF, AND VEHICLE, INFORMATION PROCESSING APPARATUS, AND INFORMATION PROCESSING SYSTEM INCLUDING THE SPEECH PROCESSING APPARATUS - An apparatus of this invention is a speech processing apparatus that acquires pseudo speech from a mixture sound including desired speech and noise. The speech processing apparatus includes a first microphone that inputs a first mixture sound including desired speech and noise and outputs a first mixture signal, a second microphone that is opened to the same sound space as that of the first microphone, inputs a second mixture sound including the desired speech and the noise at a ratio different from the first mixture sound, and outputs a second mixture signal, a first sound collector including a concave surface that collects the first mixture sound to the first microphone, a second sound collector including a concave surface that collects the second mixture sound to the second microphone and disposed in a direction different from the first sound collector, and a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal and outputs a pseudo speech signal. With this arrangement, it is possible to, in a single sound space where desired speech and noise mix, collect the desired speech and the noise, correctly estimate the noise, and reconstruct pseudo speech close to the desired speech. | 10-24-2013 |
20130297303 | SPEECH PROCESSING APPARATUS, CONTROL METHOD THEREOF, STORAGE MEDIUM STORING CONTROL PROGRAM THEREOF, AND VEHICLE, INFORMATION PROCESSING APPARATUS, AND INFORMATION PROCESSING SYSTEM INCLUDING THE SPEECH PROCESSING APPARATUS - An apparatus of this invention is a speech processing apparatus that acquires pseudo speech from a mixture sound including desired speech and noise. The speech processing apparatus includes a first microphone that inputs a first mixture sound including desired speech and noise and outputs a first mixture signal, a second microphone that is opened to the same sound space as that of said first microphone and disposed at a focus position of an interface that is part of a boundary of the sound space and has one of a quadratic surface shape and a pseudo surface shape approximating a quadratic surface, inputs a second mixture sound including the desired speech reflected by the interface and the noise reflected by the interface at a ratio different from the first mixture sound, and outputs a second mixture signal, and a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal and outputs a pseudo speech signal. | 11-07-2013 |
20130311175 | SPEECH PROCESSING APPARATUS, CONTROL METHOD THEREOF, STORAGE MEDIUM STORING CONTROL PROGRAM THEREOF, AND VEHICLE, INFORMATION PROCESSING APPARATUS, AND INFORMATION PROCESSING SYSTEM INCLUDING THE SPEECH PROCESSING APPARATUS - An apparatus of this invention is a speech processing apparatus that acquires pseudo speech from a mixture sound including desired speech and noise. The speech processing apparatus includes a first microphone that inputs a first mixture sound including desired speech and noise and outputs a first mixture signal, a second microphone that is opened to the same sound space as that of the first microphone, inputs a second mixture sound including the desired speech and the noise at a ratio different from the first mixture sound, and outputs a second mixture signal, a sound insulator that is disposed between the first microphone and the second microphone, and a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal and outputs a pseudo speech signal. With this arrangement, it is possible to, in a single sound space where desired speech and noise mix, correctly estimate the noise and reconstruct pseudo speech close to the desired speech. | 11-21-2013 |
20130332500 | SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD, STORAGE MEDIUM - To obtain a high-quality enhanced signal, disclosed is a signal processing apparatus including a transform unit that transforms a mixed signal in which a first signal and a second signal coexist, into a phase component and a magnitude component or power component for each frequency, a first control unit that replaces the phase component of a predetermined frequency, a second control unit that modifies the magnitude component or power component of the predetermined frequency in accordance with the amount of a change of the magnitude component or power component that arises from replacement by the first control unit, and a reconstruction unit that reconstructs the phase component replaced by the first control unit and the magnitude component or power component modified by the second control unit. | 12-12-2013 |
20140247949 | SIGNAL PROCESSING METHOD, SIGNAL PROCESSING DEVICE, AND SIGNAL PROCESSING PROGRAM - A signal processing method operating to generate a target blocked signal in which a target signal is suppressed by processing a mixed signal with a first set of adaptive filters, the method including estimating a noise contained in the mixed signal to determine an estimated noise, detecting a target signal contained in the mixed signal using a value that corrected similarity with a reference signal and the mixed signal by the estimated noise to determine a value corresponding to a reliability in the detection, and adaptively controlling a degree of coefficient update for first and second sets of adaptive filters according to the value corresponding to the reliability. | 09-04-2014 |