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JP3874039B2 |
To obtain a method for localizing a sound image in which a sound image localization transfer function with high accuracy is obtained with less error in a band than that of a conventional method and an arithmetic processing time is shorte...
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JP3870531B2 |
To surely reduce noise components which are mixed in information signals even at the time of transition of the operation mode of electronic equipment without substitutically lowering the quality of the signals and without being affected ...
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JP3866375B2 |
To provide the equalizer system for a digital high definition television receiver. The equalizer system is provided with an input adaptive feed forward filter(FFF) 20, a carrier recovery network 46, and a slicer 40 in addition to an adap...
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JP3859386B2 |
To improve the ability of a waveform equalization device by generating a highly precise error signal even in an equalization initial stage or after convergence when a waveform equalizer input signal is incompletely demodulated and when d...
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JP3859594B2 |
A method for analyzing data, the data characterized by a set of scalars and a set of vectors, to analyze the data into components related by statistical correlations. In preferred embodiments, the invention includes steps or devices for,...
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JP2006527969A |
An embedded pattern-based adaptive equalizer coefficient updating mechanism updates weighting coefficients of an adaptive equalizer in accordance with an error or differential signal obtained by processing the distorted version of a know...
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JP3852772B2 |
To provide a method for effectively controlling the gain of an equalizer and a phase delay amount in a training operation for the equalizer of the medium reading signal of a hard disk device. A coefficient updating vector for updating a ...
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JP3847989B2 |
To extract in real-time only a voice signal component from a signal of one channel that a voice signal and a non-voice signal are mixed by using the signal shifting an input signal by a fixed time and using the high band emphasized signa...
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JPWO2005024822A1 |
As shown in FIG. 1, the reproduction signal processing device (100) of the present invention predicts a predicted value which is a data series of the reproduced signal X in the pattern predictor (103), and is preset with the predicted va...
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JP2006526328A |
An adaptive filtering device and method where at least one adaptive filter receives an input signal and a metering device receives an output of the at least one adaptive filter, monitors a characteristic of the output, such as power of h...
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JP2006252681A |
To provide an optical disk drive capable of obtaining excellent reproduction performance by stabilizing a PLL circuit.The operation of the PLL circuit is stabilized by arranging phase detectors for signals before and behind an FIR filter...
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JP3822194B2 |
To prevent a divergence of an adaptive equalizing circuit in a data reproducing apparatus which carries out an equalization process of a regenerated signal by the adaptive equalizing circuit. An optical disk reproducing apparatus 100 is ...
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JP3810110B2 |
To reduce the tap coefficient of a filter, to miniaturize the filter, to reduce cost and to speed up an arithmetic processing by adding a desired acoustic characteristic to an original signal by using the linear synthetic filter in which...
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JP2006203881A |
To provide a new method and apparatus for the improvement of digital filter banks by a complex expansion of cosine modulated digital filter banks.The present invention employs complex-exponential modulation of a low-pass prototype filter...
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JP3804496B2 |
To provide an adaptive step size control adaptive filter and an adaptive scale coefficient control method for improving a residual mean square error when identifying the unknown system response of a non-ordinary change with time in the a...
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JP3800147B2 |
To efficiently cancel variable cyclic noise from a main input. A variable cyclic pulse signal and a sampling clock are input to a counter means 32 in an adaptive signal processor 30, and an input cycle is counted by a sampling clock to i...
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JP2006191650A |
To align an adaptive filter of an echo canceller in echo location, using merely a speech signal.A method for adaptation to the echo location in the echo canceller comprising an output port, an input port, an adjustable delay unit (43) fo...
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JP3797694B2 |
To effectively execute coefficient updating by constituting an equalizing device of an equalizer filter having plural equalization coefficients and of a coefficient updating module for generating an updated coefficient. A received TV sig...
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JP3798636B2 |
To provide an adaptive notch filter which can make notch characteristics steep and accelerate a convergence in adaptive operation. An SSB detection output, which is set to a constant level by an automatic level process circuit 8 by recei...
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JP3787790B2 |
PURPOSE: To extend a frequency error range to be traced by controlling accurately a phase of sampling at A/D conversion with respect to the timing recovery circuit for a digital transmission reception circuit. CONSTITUTION: In a digital ...
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JP3785629B2 |
To provide the signal correcting device, etc., which can easily, speedily, and surely correct characteristics of a transmission system having nonlinearity such as a speaker. The signal correcting device 12 corrects and supplies an input ...
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JP3784990B2 |
To reduce the error that is caused by the influence of the overflow, etc., when a designing operation is carried out by a programmable device such as a systolic array processor and by means of a fixed point operation by setting the thres...
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JP3782103B2 |
For encoding sound received as a stream of multibit input sample, from a finite length sequence of input samples, an instantaneous audibility threshold characteristic is determined. Next, a shaped, dither determined, signal is subtracted...
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JP2006139306A |
To improve the characteristics of a buried channel.For encoding the sound received as a stream of multibit input sample, from a finite length sequence of input samples, an instantaneous audibility threshold characteristic is determined. ...
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JP3780431B2 |
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JP2006121680A |
To provide an equalizer and method for the same which enable a chip size to be reduced by decreasing distortion in a filtered signal and determining values of filtering coefficients even without using a comparator.The equalizer is charac...
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JP3774255B2 |
To obtain the integrated circuit equipped with a multiplex communication function. The integrated circuit 24 includes a memory 70 which stores audio encoding algorithm, echo cancel information, modulating process algorithm, and audio dat...
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JP3772602B2 |
To perform adaptive equalization to an equalization error and also to perform accurate phase detection by updating occasionally the tap coefficient of an adaptive equalization means according to the calculation result of correlation betw...
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JP2006109501A |
To learn and compensate for line defects.The equalizer forms an equalized received value X'(n) based on a combination of a compensated received value X(n) and a stored value D(n) corresponding to (k) prior output values Y(n-1), ..., Y(n-...
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JP3761220B2 |
PURPOSE: To reduce the number of finite impulse responding filters to be constituted and points of multipliers by accepting increase of a number of adders which are easily embodied from the viewpoint of hardware. CONSTITUTION: Yr+Yi is g...
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JP2006510069A |
A system and method for separating a mixture of audio signal into desired audio signals ( 430 ) (e.g., speech) and a noise sign ( 440 ) is disclosed. Microphones ( 310, 320 ) are positioned to receive the mixed audio signals, and an inde...
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JP3751359B2 |
To obtain a vibration-noise transmission characteristic of high accuracy following aged deterioration and the like without outputting an identification signal itself. Adaptive control circuits 201, 202 provided in a DSP 12 has vibration ...
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JP3750198B2 |
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JP3737156B2 |
PURPOSE: To perform automatic setting by rectifying output signals by a full- wave rectifier, integrating the output signals of the full-wave rectifier in an integrator and setting the parameter of an equalizer so as to maximize the leve...
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JP2006005619A |
To provide an adaptive equalizer that can stably decides the degree of convergence of even a signal varying in spectrum from moment to moment like a voice and can also decide the convergence state even in presence of noise.Disclosed is t...
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JP3732167B2 |
To always realize a normal adaptive operation. In order to negate noise transmitting through an exhaust duct 1 with an acoustic wave emitted from a secondary sound source loudspeaker, a Filtered-x LMS algorithm executing part 8 controls ...
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JP3730751B2 |
To reduce a residual error after convergence without reducing the convergence speed of an adaptive filter by controlling a step size at the time of obtaining an N-dimensional tap weight vector so that it becomes almost equal to the value...
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JP2005538578A |
An adaptive pre-equalizer is disclosed to compensate amplitude ripples in a low cost transmitter pass-band filter. A filtered-x LMS algorithm is proposed to calculate the equalizer coefficients. To this purpose, the modulated RF signal i...
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JP3725959B2 |
To identify a secondary sound path (a transfer function) without being adversely affected by disturbance noise. Pseudo signals mk outputted from a pseudo signal generator 10 are supplied to a secondary sound source speaker 6 through an e...
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JP3720484B2 |
To obtain an adaptive analog generalization transversal equalizer used in a filtering system of a disk device PRML(Partial Response Maximum Likelihood) read-out channel, low in manufacturing cost, small in size and is easy to manufacture...
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JP2005326424A |
To make it possible to decide accurately rotational frequencies of EC motors in a simple fashion.At least a correction value is derived to memorize for compensating, at least, an influence quantity of allowable error or allowable deviati...
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JP2005323384A |
To provide an apparatus (100) and a method (400) suitable for use in a communication device by equalizing an input signal received to mitigate multipath distortion effects present in the input signal in the communication device.A first f...
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JP2005318636A |
To provide a method for automatically determining equalizing filter characteristics for an indoor communication system of a cabin for vehicle.An indoor communication system includes at least one loudspeaker and at least one microphone an...
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JP3707443B2 |
To minimize average errors in self-multiplication by adaptively control ling an oblivion coefficient, in identification of an unknown system for changes in non-stationary state, in an adaptive filter, using the least-squares algorithm se...
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JP3707572B2 |
To accelerate convergence speed by respectively dividing a received signal and an echo signal into N pieces of frequency bands, synthesizing echo erasure error signals in the N pieces of frequency bands and generating the transmissive si...
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JP3701940B2 |
The invention relates to a system and method for processing a signal being emitted from a target signal source 20 into a noisy environment, wherein said target signal source 20 is located in a target signal source direction ϕs with rega...
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JP3703606B2 |
To faithfully reproduce a preliminarily set acoustic environment in each ear of a listener by providing an anti-phase signal successive estimating part for successively estimating the anti-phase signal of contribution by a speaker in a s...
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JP3701441B2 |
To detect abnormality of an audio device provided with an adaptive equalizer control function and to prevent the audio device from breaking. The abnormality of the audio device provided with a adaptive equalizer control function is detec...
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JP3697702B2 |
PURPOSE: To reduce the calculation volume in filter processing by converting the frequency transfer function between an actuator means and a sensor means so that the condition of control stability/instability is not dependent upon the fr...
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JP2005229312A |
To provide an adaptive digital filter capable of performing the high-speed processing of the operation of an update value a[n+1] of a coefficient (a) with a small-scale circuit configuration.The adaptive digital filter 1 is provided with...
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