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JP2008518542A |
A receiver uses a sigma delta ADC (126) and an adaptable digital filter (132). Detector circuitry detects information about unwanted parts of the signal from an oversampled digital signal, before the filtering, and feeds forward the dete...
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JP2008103021A |
To suppress read errors in reproducing with a simple configuration.The adjusting module 22 equalizes a waveform of an input reproduction signal to output an equalized reproduction signal to a binarizer 28 and a PLL circuit 23. The PLL ci...
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JP4082837B2 |
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JP4081237B2 |
A method and an apparatus for distinguishing systematic artifacts from noise involves localizing functional noise in the vicinity of predicted functional peaks. The method is particularly relevant to detection and tracking of time-varyin...
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JP4080033B2 |
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JP4077383B2 |
In an active noise cancellation system having an adaptive filter (16b) that outputs a control signal, first and second speakers (20f, 20r) that emit a canceling signal generated based on the control signal, a microphone (22) that detects...
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JP4073290B2 |
The arrangement has an adaptive filter (33) and a control unit that is configured to use a wavelet transformation on an input signal, to determine a change in the input signal on the basis of the wavelet-transformed input signal, to adap...
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JP4068182B2 |
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JP4067269B2 |
Abstract of the Disclosure Quick real-time identification and estimation of a time-non-varying or time-varying system. A new H( evaluation criterion is determined, a fast algorithm for a modified H( filter based on the criterion is devel...
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JP2008067070A |
To provide an adaptive noise filter for realizing reduction of a noise signal in a high frequency region using a noise eliminating signal.An observation signal d is detected, the signal is considered as an observation error e' and a filt...
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JP4057497B2 |
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JP4053512B2 |
A device for removing an interference signal with a different characteristic included in input signals and an interference signal removing method are disclosed. The device for removing an interference signal comprises an IIR notch filter...
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JP2008042293A |
To obtain an adaptive equalizer for evading the stop of the update of tap coefficients in the middle, and for carrying out signal equalization after sufficiently updating the tap coefficients even when it is achieved by a digital circuit...
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JP4041770B2 |
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JP2008017094A |
To provide an adaptive equalizer capable of removing delay distortion from a reception signal even when the S/N ratio of the reception signal is small.A reception signal S is input to a reception signal adding section 1 incorporating a s...
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JP4034853B2 |
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JP2008004150A |
To accurately reduce a cyclical noise signal component from an input audio signal S1.In an adaptation processing part 20, a pseudo noise signal S6 similar to a cyclical noise signal component is generated by a pseudo noise signal generat...
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JP4030983B2 |
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JP4031988B2 |
A computer system that processes mixtures of signals, such as speech and noise sources derived from multiple simultaneous microphone recordings, in order to separate them into their underlying sources. A source separation routine optimiz...
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JP4027444B2 |
The present invention relates to a signal reproducing method and a signal reproducing apparatus for reproducing a signal recorded by a high-density recording. The invention avoids deteriorating the performance of an ML detector while sup...
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JP4026693B2 |
In a dual filter echo cancellation method, a new quality measure provides the basis for a new filter selection and transfer method. The quality measure represents the performance of a filter in the adaptive echo canceller. According to t...
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JP4025378B2 |
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JP2007536877A |
A method to automatically and adaptively tune a leaky, normalized least-mean-square (LNLMS) algorithm so as to maximize the stability and noise reduction performance in feedforward adaptive noise cancellation systems. The automatic tunin...
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JP4016115B2 |
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JP4010348B2 |
The present invention relates to a CDMA system, which, in part, uses serial and parallel interference cancellation methods to overcome disadvantages of a method of detecting single user, and comprises a feedback loops for providing repro...
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JP4011745B2 |
The filter includes a decision circuit (4) which is coupled to an adjustment circuit (8) which is controlled externally either manually or via data. The adjustment circuit varies the mixing characteristic of a mixer (5) which is dependen...
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JP4007676B2 |
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JP4004710B2 |
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JP4004708B2 |
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JP4002757B2 |
The present invention provides a data processing apparatus and method for performing an adaptive filter operation on an input data sample to generate an output data sample. In accordance with an adaptive filter operation, a logical compu...
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JP4002548B2 |
A low-frequency eliminating unit outputs a signal derived from attenuating the extreme bass range in an input audio signal, so as to reduce bass distortion. A high-frequency retrieving unit retrieves, from the signal output from the low-...
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JP3988802B2 |
A receiver or receiver system for high speed data communications having a radio frequency noise canceller is disclosed. The radio frequency noise canceller removes radio-frequency noise from received signals over a transmission medium by...
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JP3977744B2 |
The present invention proposes a new method and apparatus for the improvement of digital filterbanks, by a complex extension of cosine-modulated digital filterbanks. The invention employs complex-exponential-modulation of a low-pass prot...
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JP2007221629A |
To provide an adaptive equalizer capable of minimizing the number of circuits to be added and improving a search capability. This adaptive equalizer comprises a digital filter 6 and performs the adaptive equalization of digital signals. ...
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JP3964092B2 |
To provide an adaptive equalizer for audio and a determining method for filter coefficient, with which music or the like can be listened to in the optimal state at all the time, by applying a correction corresponding to a reproducing spa...
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JP3958405B2 |
To detect an original recording signal by including a stage for using the error obtd. by subtracting an output signal from a reference signal and equalizing the tap count of an adaptive type partial response target equalizer by a method ...
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JP3936228B2 |
To provide a system and a method for avoiding false convergence due to the presence of a tone, in time-domain echo cancellation. The system for avoiding false convergence in an echo canceler, having an adaptive step size controlled for c...
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JP3928332B2 |
To realize a stable adaptive equalizing operation without varying a reference value for calculating an equalization error to an input fluctuating in amplitude, in an adaptive equalizing circuit. An input signal is sampled and held by a t...
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JP3931237B2 |
To separate more source signals than mix signals from the mix signals where the source signals are spatio-temporally mixed. A signal storage section 12 stores the mix signals input into a signal input section 11. The formulation section ...
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JP3924507B2 |
To provide a systolic array device capable of simultaneously handling a plurality of reference signal series in a case when the plurality of reference signal series are handled by the same input signal series during processing of an RLS ...
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JP3917116B2 |
To provide an echo canceler the performance of which is not deteriorated even when a reproduction signal and a size of a simulated error are subjected to scaling at the same ratio. The echo canceler includes: a means for storing an acous...
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JP3916266B2 |
PURPOSE: To speedily control a tone quality of a noise under a specific condition. CONSTITUTION: An adaptive filter 6 to form a tone quality control signal to control a tone quality by inputting a reference signal releated to a noise and...
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JP2007511966A |
A method and apparatus for reducing echo in a communication system are provided. A first signal including a voice component associated to a speaker is received. The first signal is processed to derive a harmonic feature of the voice comp...
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JP3907215B2 |
PURPOSE: To improve an adaptive processing of a headphone type noise controller for forming a cancel sound for a noise. CONSTITUTION: In the noise controller, plural user side noise units 201-1 incorporate a senser 8 inputting the noise ...
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JP2007089023A |
To provide a signal processing device capable of suitably eliminating noise included in an output signal from a sensor according to the magnitude of the noise.The signal processing device 1 comprises a filtering means 2 for subtracting a...
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JP2007087461A |
To remove effectively a non-linear distortion without increasing circuit scale.The apparatus is provided with: a filter operation part 51 in which product of an input signal and an value obtained by delaying the input signal is calculate...
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JP3898449B2 |
To improve operation speed and characteristics with the minimum circuit scale, in the transmission line large in delay time in a sequence estimating method and to improve a sequence estimating device. At the time of estimating a transmis...
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JP3898415B2 |
To provide a multi-value digital signal demodulation circuit that can sufficiently enhance the transmission efficiency while suppressing occurrence of data transmission errors. The automatic equalization circuit has an equalization purpo...
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JP3877882B2 |
To maintain a sufficient normal state estimated quality by utilizing a proportionate normalized least-mean squares(PNLMS) adaptive method so as to attain quicker response to a varying condition. A PNLMS adaptive method is different from ...
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JP3874813B2 |
PURPOSE: To realize highly accurate high speed weighing by setting an operation command corresponding to the weighing conditions, e.g. the kind of object to be weighed and the carrying speed of a conveyor. CONSTITUTION: Predetermined fil...
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