Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Provided is a multi-point connection device including: a first signal receiving unit which receives a first signal containing a plurality of constituent elements and first analysis information expressing the relationship between the constituent elements contained in the first signal; a second signal receiving unit which receives a second signal containing a plurality of constituent elements and second analysis information expressing the relationship between the constituent elements contained in the second signal; a signal mixing unit which mixes the first signal and the second signal; and an analysis information mixing unit which mixes the first analysis information and the second analysis information.

Abstract: A signal analysis device includes: a signal reception unit which receives an input signal containing a plurality of constituent elements; and a signal analysis unit which generates analysis information indicating the relationship between the constituent elements from the input signal.

Abstract: [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. [Achieving Means] The invention includes: a gain control section 900 having an analyzing section 903 which analyzes characteristics of a target signal and a correcting section 905 which corrects a target signal power estimated value in response to the analysis result; and blocking matrix circuits 310 and 320 which receive and process signals from a plurality of sensors having different intervals.

Abstract: 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.

Abstract: The noise suppression device includes: a shock noise detection unit which receives an input signal including a shock noise and detects a shock noise according to a change of the input signal; and a shock sound suppression unit which receives the shock sound detection result and the input signal so as to suppress the shock sound.

Abstract: 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.

Abstract: 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.

Abstract: There is provided a sheet post-processing unit having a simple structure, capable of stably conveying sheets on a tray and causing less ruggedness in conveying and aligning the sheets discharged one after another to the tray to form a bundle of sheets and to staple it. The sheet post-processing unit is provided with sheet conveying means for conveying the sheet stacked on the post-processing tray in the same and reverse directions with/from the sheet conveying direction and intersectional moving means for conveying the sheet in the direction orthogonal to the sheet conveying direction by moving the sheet conveying means in the direction orthogonal to the sheet conveying direction. It conveys the sheet while keeping rollers of the sheet conveying means in contact with the sheet and aligns the sheet by hitting the trailing edge thereof against a trailing edge stopper and by hitting the side edge of thereof against a wall by moving the rollers in the intersecting direction.

Abstract: An apparatus for noise suppression has a converter for converting an input signal into a frequency-domain, an SNR calculator for determining a signal-to-noise ratio (SNR) using the frequency-domain signal, a spectral gain generator for determining a spectral gain based on the SNR, a spectral gain modification unit for correcting the spectral gain to determine a modified spectral gain, a multiplier for weighting the frequency-domain signal using the modified spectral gain, and an inverse converter for converting the weighted frequency-domain signal into a signal in a time-domain signal. In the apparatus for noise suppression, it is preferable to calculate a weighted noisy speech power spectrum from the power spectrum of noisy speech and the power spectrum of estimated noise thereby determining an SNR.

Abstract: The adaptive digital filter of the present invention includes: a filter unit that includes a plurality of multipliers (3360-336N-1) that are divided into groups of at least one multiplier and the other multipliers based on expected values of filter coefficients and that generates first signals by means of convolution operations of an input signal and filter coefficients; an adder (338) that adds the input signal that is applied to at least one multiplier (336M-1) and first signals and supplies the results as second signals; and coefficient control unit (318 and 3190-319N-1) that control filter coefficients based on error between a target signal and an index value derived from the second signals.

Abstract: 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.

Abstract: A sheet post-processing unit usable in an image forming apparatus includes a sheet stacking device; a sheet conveying device including at least one roller rotatably supported by an arm movably and vertically rockingly supported, an actuator for moving the arm capable of selectively conveying each sheet to be discharged and of separating from the sheet by moving in a vertical direction; a control section for setting a moving distance of the intersectional moving device corresponding to a size of each sheet to be discharged; and a sheet clamping device. The roller abuts an uppermost sheet among sheets stacked on the sheet stacking device and an intersectional moving device moves the roller in the intersecting direction by a moving distance corresponding to the sheet size set by the control section to hit against and align the uppermost sheet with an upstream side regulating member and an intersectional regulating member.

Abstract: [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. [Achieving Means] A device includes: a pair of array processing sections 330 and 340 in which a gain is non-zero with respect to a target signal, and a phase difference in processing results with respect to interference becomes close to 180 degrees; and a correlation calculation section 920 which calculates correlation between their outputs.

Abstract: [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. [Achieving Means] The present invention is characterized as to array-process signals received from a plurality of pairs of sensors having a plurality of different sensor intervals, and using the array processing result, estimate interference power accurately. More specifically, the present invention includes a multiple blocking matrix circuit 320 which processes signals receiving from sensors having a plurality of different intervals, and an accurate coefficient update control is performed based on the output array-processed signal. Thereby, deterioration of output signals and breathing noises are reduced, and high-quality array processing can be performed.

Abstract: [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.

Abstract: 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.