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JPH10242737A |
To control the side lobe characteristic of a directional pattern by calculating a one-dimensional frequency response corresponding to an impulse response, calculating a two-dimensional frequency response between the normalized time frequ...
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JPH10240268A |
To provide a muffler capable of performing precise system identification while driving an engine. This device is provided with a coefficient operator 43 for forming a muffle signal for generating a sound wave with a size equal to and a p...
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JP2795053B2 |
PURPOSE: To provide an automatic equalizer capable of equalizing inter-code interference due to fading more efficiently in a demodulator for digital radio communication. CONSTITUTION: The system employing the demodulator is provided with...
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JP2792252B2 |
Echo canceling method and apparatus for subtracting, from a mixed signal in which echoes produced from a plurality of reception signals are mixed with a transmission signal, a replica of the echoes in order to cancel the echoes in the mi...
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JP2792489B2 |
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JP2792311B2 |
A multi-channel echo canceller comprises a set of subtractors connected respectively in communication channels for respectively receiving a signal from a respective microphone and cancelling an echo contained in it with a cancelling sign...
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JPH10233651A |
To accurately reproduce even signals accompanied by noise in simple constitution by specifying the front of the signals with the fluctuation of the signals, a distance between samples and a reproduction sample as variables and sectioning...
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JPH10232682A |
To make it possible to update I/O characteristic even if calculation does not end within a fixed period by asynchronizing with sampling a point of time for updating an input-output characteristic of a digital signal processing system and...
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JPH10229323A |
To allow the filter to respond to a sudden change in a transfer characteristic flexibly at a high speed by initializing a normalized power matrix, a cross correlation matrix and an autocorrelation matrix that are applied to an arithmetic...
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JP2787895B2 |
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JP2786304B2 |
PURPOSE:To decrease the deterioration in the resolution of even a moving picture by detecting correlation between frames locally, applying inter-field calculation and applying YC separation in a frame including an in-field band limit of ...
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JPH10206180A |
To enable a driver to recognize an advancement direction of a vehicle (left turn, right turn, straight) even when a navigation sound cannot be heard clearly. In a navigation sound output apparatus, when a navigation sound signal is input...
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JP2784134B2 |
PURPOSE: To allow stabilized control for as a capacitive load to be compensated having an antiresonant point, as well as for the high order harmonics, determining a compensation current reference for an arbitrary harmonic including the b...
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JPH10198386A |
To reduce the effect of noise and improve acoustic characteristic of regenerated sound without requiring large hardware, by providing a first coefficient updating device and a first adder which adds first and second filters' output signa...
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JP2778418B2 |
PURPOSE: To perform an optimum characteristic correction according to use purposes, etc., in a device correcting the response characteristic of a reproduction system so that the response characteristic of the reproduction system may matc...
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JP2778513B2 |
PURPOSE: To provide an echo canceler device capable at returning a response coefficient to a value before it is disturbed by the less storage amount of data even when the response coefficient is disturbed by double talk. CONSTITUTION: A ...
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JPH10190532A |
To improve performance in a system using many symbol levels in a signal space by converging the set of tap coefficient values as the function of the coordinate value of a corresponding area and an output sample. A circuit 500 comprises a...
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JPH10190589A |
To provide on-line feedback route modeling and on-line secondary route modeling active noise control system and method. A feed-forward active noise control system 50 provided with a reference sensor 16, a secondary source 18, an error se...
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JPH10190590A |
To provide an active noise controller for preventing noise elimination signals generated so as to attenuate noise signals entering from a medium from adversely affecting from a feedback route. A feed-forward active noise controller 50 pe...
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JP2775570B2 |
PURPOSE: To provide a non-linear converter into which aliasing noise is not mixed so much, in a distortion adder of digital processing type. CONSTITUTION: In a digital processing type distortion adder in which a digital signal converted ...
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JP2776938B2 |
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JP2777260B2 |
PURPOSE:To compensate the transmission characteristic with a simple circuit by providing a compensation means giving a prescribed transmission characteristic before or after a D/A converter means in a processing unit applying D/A convers...
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JP2773402B2 |
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JP2773550B2 |
PURPOSE: To eliminate radar interference wave properly without being affected by deterioration in adaptive following characteristics of a digital transmission signal for eliminating interference wave when a radar wave where a CW wave sig...
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JP2770626B2 |
PURPOSE: To obtain an adaptive receiver detecting a fluctuation speed of a characteristic of a transmission line to set an optimum equalizer so that a tracking speed is optimum when the fluctuation is fast and tracking accuracy is optimu...
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JPH10178371A |
To improve the capability of blind-converging an equalizer in spite of the increase of a symbol level by using an output sample from the equalizer. A circuit 500 includes a central arithmetic processor (processor) 505 and the equalizer 5...
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JPH10171470A |
To reduce structural load and installation work. A canceling-purpose acoustic signal s (n) is made by making a noise reference signal x (n) pass through a filter 5 with a transfer function W, and is power-amplified by a power amplifier 7...
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JPH10173489A |
To automatically obtain optimal noise suppression and S/N improvement according to an input signal level by varying the response characteristics of an adaptive filter based on the input signal or on S/N of the adaptive filter. A function...
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JP2770286B2 |
PURPOSE: To provide the vibration noise controller which can be improved in converging speed more by reducing an arithmetic load, etc. CONSTITUTION: In a C table 36, the phase shift quantity ΔP and amplitude gain variable Δa of a trans...
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JPH10164686A |
To provide an echo canceler which causes less distortion than the conventional device. A ripple disintegrating section 25 disintegrates a reference signal u(n) into a plurality of reference packets and another ripple disintegrating secti...
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JPH10163929A |
To prevent degradation of equalization ability without being affected by noise components. The noise components in a reception band are extracted by a BPF 90 and the reception level of the noise components is analyzed at all times in a d...
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JPH10164238A |
To efficiently perform echo control from the beginning by preliminarily storing a parameter value that matches the picture conference system environment of a conference room, calculating an adaptive filter coefficient that is appropriate...
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JPH10163928A |
To provide a blind equalizing technology taking advantage of CMA and MMA by using constant modulus algorithm(CMA) and multi-modulus algorithm(MMA) at blind start up. At blind start up, CMA and MMA are used. This approach provides a base ...
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JP2765494B2 |
PURPOSE: To effectively suppress echo in a speech state in the echo estimation process of an echo canceler for processing howling or echo or after estimation concerning the audio conference system of utilizing lines. CONSTITUTION: Corres...
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JP2765375B2 |
PURPOSE: To take out satisfactory equivalent output by updating a tap coefficient by a specific signal when the code of an output signal is different from that before or after change. CONSTITUTION: An error selection signal S is activate...
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JP2765374B2 |
PURPOSE: To reduce a decision error by eliminating an output signal from a reference signal used in coefficient control. CONSTITUTION: A delay element 13 between a subtractor 9 and a switch 11 is provided to generate delay for unit time ...
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JPH10505964A |
PCT No. PCT/GB95/02122 Sec. 371 Date May 28, 1997 Sec. 102(e) Date May 28, 1997 PCT Filed Sep. 8, 1995 PCT Pub. No. WO96/08867 PCT Pub. Date Mar. 21, 1996In adaptive digital filtering, first steps of adapting a filter coefficient depende...
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JP2761077B2 |
PURPOSE:To eliminate noise component from a picture signal and to enhance the degree of the filter by using a frame memory to allow a decoded picture signal to pass through a 2-dimensional LPF for plural number of times and making the nu...
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JPH10149172A |
To provide the active sound eliminating device which can reduce the whole noise radiated by equipment, etc., placed in a three-dimensional space under automatic control in simple constitution. This device is equipped with an additional s...
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JP2760373B2 |
PURPOSE: To provide a noise suppressor which realizes shortening of convergence time and decrease of strains after convergence. CONSTITUTION: This noise suppressor includes an adaptive filter 4 which forms a first pseudo signal by using ...
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JP2758846B2 |
PURPOSE: To perform a hand-free telephone speech even from either microphone of the driver's seat and the assistant driver's seat by providing noise cancelers for sound signals from two microphones respectively. CONSTITUTION: An FIR adap...
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JP2756420B2 |
PURPOSE: To obtain the inexpensive filter with a simple structure by which noise is reduced and an image ridge is emphasized. CONSTITUTION: The filter 1 is provided with an image ridge detection circuit 6 connected between outputs of the...
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JP2756629B2 |
An adaptive control device is arranged to cancel periodic noises without any malfunction and delay if aperiodic noises are mingled in the periodic noises. In the adaptive control device, the reference signal sensor senses a reference sig...
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JP2757495B2 |
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JP2755712B2 |
A ghost cancelling system which distinguishes whether ghosts have been substantially cancelled from a video signal for finding an equilibrium condition. The system calculates a specified value which depends on the noise signal contained ...
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JPH10135941A |
To provide the output interface, through which data are transferred from a data source operated at a 1st clock rate to a data sink operated at a 2nd clock rate. The output interface includes a 1st latch 1302 operated at an internal clock...
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JPH10135784A |
To provide an adaptive filter which has a high converging speed of a tap coefficient by updating the sum total of power value of the tap coefficient so as to decrease the number of tap coefficients which are updated in sequence from the ...
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JPH10134512A |
To provide a waveform equalizer by which the high speed and the stabilization of the optimization of a factor are made compatible. An update circuit 68 performs an update processing operation in an update amount which is instructed from ...
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JP2572057Y2 |
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JP2752995B2 |
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