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JP2599492Y2 |
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JP2946632B2 |
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JP2941713B2 |
Data detection method and apparatus in a data storage device are provided. The data detection apparatus includes: a Random Access Memory (RAM) updating device for obtaining the average characteristic of the equalization signal zk from th...
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JP2943803B1 |
In a receiving device, a mixer combines a frequency which is different from a carrier frequency by (2n+½)omega0 and a reception signal, provided that n is an integer, omega0=2PI/T, and T is a transmission rate of a base band signal, a f...
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JP2940822B2 |
To absorb learning fluctuations due to noise by calculating a filter coefficient for a back up by using a prescribed learning process. When a changeover switch 23 is connected to a contact 'a', a signal in which a 1st dummy echo signal t...
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JP2936101B2 |
A digital echo canceller [1] with a good protection against double-talk comprises a first filter [9] for the echo cancellation proper, a second adaptive filter [11] for making continuously adapted filter coefficients available to the fir...
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JPH11225175A |
To apply adaptive waveform equalization processing to a multivalue- modulated output of a transmission channel. An adaptive waveform equalization processing unit for a multivalue-modulated output of a transmission channel is provided wit...
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JPH11225044A |
To obtain the device by which the number of components required to execute multiplication by an update unit in an adaptive equalization unit in a transceiver is reduced and to obtain its relating method. An update unit of an adaptive, th...
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JP2935309B2 |
PURPOSE: To eliminate distortion and to decide a correct code for an NRZ code, a run length limited code receiving the linear distortion and the non-linear distortion of a waveform. CONSTITUTION: By a subtraction square circuit 1, a diff...
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JP2934110B2 |
PURPOSE: To provide a high-speed digital filter having a wide dynamic range by controlling plural low resolution adaptive filters to be operated in overlap mode in response to a specified output signal. CONSTITUTION: A binary input data ...
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JP2934928B2 |
PURPOSE: To eliminate even a noise which has a periodic component by updating the filter coefficient of a 1st adaptive digital filter on the basis of the mean electric power of a sound elimination error signal as an evaluation reference....
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JP2934225B1 |
[wrap up] [Task] When the delay time of the delayed wave generated in the multipath propagation path exceeds the guard interval period, the influence of ISI is removed and good demodulation is possible. After delaying the corrected compl...
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JPH11220429A |
To correctly decode divided signals using a filter bank by compensating for distortions of respective signals with band divisions. This adaptive equalizer 100 uses a band division filter 101 to divides an input signal into M-sets of freq...
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JP2932830B2 |
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JP2932761B2 |
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JPH11212597A |
To provide a method which suppresses narrow-band fixed frequency interference of an audio signal by using adaptive notch filtering without causing the damage of an effective signal. If an audio signal doesn't exist or only a slight part ...
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JP2929565B2 |
PURPOSE: To reduce the effect of disturbance, and to improve the transient characteristic of a synchronous noise by correcting a gain so that the sum of squares of an error between the waveform of the inputted synchronous noise and the o...
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JP2929875B2 |
PURPOSE: To effectively prevent a divergence state and a sound amplification state if an unsteady large input is generated. CONSTITUTION: If the large input is detected among reference signals X1-X4 and residual noise signals e1-e8, a mi...
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JP2930101B2 |
To sufficiently eliminate a noise signal and to reduce signal distortion that is caused by mixture of a desired signal to a reference microphone. This device has a signal-to-noise power ratio estimating circuit 10 which receives a main s...
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JP2928967B2 |
PURPOSE: To cancel a noise well even when the correlation of a noise source with noise at a listening point is low. CONSTITUTION: The noise that the noise source 1 outputs is detected by a noise detector 2, whose detection signal is proc...
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JPH11205197A |
To reduce the constitution of a filter unit by reducing the number of bits for indicating error signals inside a transceiver unit provided with an adaptive equalizer filter unit. This device 30 replaces the plural most significant signal...
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JP2924762B2 |
An input signal is supplied to a tapped-delay line adaptive filter to produce tap signals which are equally divided into groups. The tap signals are selectively coupled on a per group basis through a switch to coefficient generators wher...
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JP2924502B2 |
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JPH11508372A |
A residual error based compensator for the frequency domain bias of an autoregressive spectral estimator is disclosed. LPC analysis is performed on the residual signal and a parametric PSD estimate is formed with the obtained LPC paramet...
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JP2920988B2 |
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JP2921253B2 |
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JP2921375B2 |
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JP2921849B2 |
An electronic filter for an electroacoustic system. The system has a microphone for generating an electrical output from external sounds and an electrically driven transducer for emitting sound. Some of the sound emitted by the transduce...
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JPH11508105A |
This invention is a component of an adaptive filter signal processor whose purpose is to separate a mixture of signals received by each of a plurality of transducers. This invention accomplishes a key step in that separation: it estimate...
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JP2919475B2 |
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JP2914999B2 |
For simultaneously reducing noise and cross-colour in television signals, it is proposed on the basis of a method for noise reduction with the aid of recursive digital filters to use an adaptive recursive signal filtering in which the fi...
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JPH11177471A |
To provide an adaptive equalizer that avoids the occurrence of a frame erasure resulting from non-termination of a sequential series estimate algorithm, even when a pattern which is incapable of being undecoded uniquely in an impulse res...
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JP2913647B2 |
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JP2911105B2 |
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JP2911773B2 |
In the case where a received multi-level orthogonal amplitude signal is not synchronized with a local carrier frequency signal, a digital multiplexing radio receiver recognizes that an adaptively-equalized data exist in a specified area ...
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JP2907217B2 |
In an adaptive filter (56) the coefficients of a transversal filter (64) are adjusted by a processing circuit (78) to reduce the difference between a signal applied to the filter input (55) and a reference signal applied to a further inp...
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JP2907091B2 |
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JP2908697B2 |
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JP2596317Y2 |
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JPH11154894A |
To provide an echo canceler, which can be executed in a comparatively small circuit with high calculation efficiency having low drain current characteristic to quickly converge and suppress echo signally more than 40 dB. An echo canceler...
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JP2901646B2 |
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JPH11506291A |
In a receiver system embodying the invention, the amplitude of the input signal is sensed so that when it exceeds a predetermined level, the adaptation of adaptive filters employed in the receiver is inhibited. In one embodiment of the i...
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JP2900722B2 |
PURPOSE:To provide the stereo zoom microphone in which no unnatural change is caused in the sound quality of a sound in a front direction at the time of a wide angle and a narrow angle setting without new addition of a microphone to emph...
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JPH11149292A |
To provide a method, a device and a mobile station that attenuate noise effectively by low power, by weighting the most interruptive frequency of the noise, when the noise is attenuated using antinoise. A noise standard value (x) is obta...
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JP2899205B2 |
A vibration/noise active control system for automotive vehicles which generates a canceling signal for canceling vibrations and noises generated within the compartment of the vehicle, based on a reference signal related to the vibrations...
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JPH11506204A |
The filtering method provides a data base unit for storing information on test point sensor output signal values for some sensors and values for external events corresponding to the output signal values, or simultaneous time series of th...
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JPH11146482A |
To perform correction corresponding to the real reactance characteristics of a speaker. A reactance characteristic determining part 12 finds the real reactance characteristics of a speaker 15, and an arithmetic part 18 generates an error...
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JP2893563B2 |
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JPH11505695A |
PCT No. PCT/FI97/00176 Sec. 371 Date Nov. 7, 1997 Sec. 102(e) Date Nov. 7, 1997 PCT Filed Mar. 18, 1997 PCT Pub. No. WO97/35384 PCT Pub. Date Sep. 25, 1997A method and a receiver in a system in which received signals are composed of a nu...
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JP2891295B2 |
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