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JPH11126432A |
To provide an adaptive equalizer in which convergence of a tap coefficient is improved while preventing degradation of follow-up characteristic of a PLL circuit. The equalizer is made to be such primary coupling that group delay is a 0 p...
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JP2888174B2 |
To improve the convergence to a synchronization state by providing an output of a signal or a prescribed value obtained by holding a correlation signal outputted from N-sets of taps, respective, based on an asynchronizing signal outputte...
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JP2889599B2 |
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JP2887916B2 |
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JP2889114B2 |
An active adaptive noise canceller (100) that does not require a training mode and operates over an extended noise bandwidth. The canceller partitions the noise bandwidth into frequency sub-bands, and multiple adaptive filter channels (1...
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JP2888121B2 |
PURPOSE: To reduce the convergence time and the residual error when an unknown system such as a transmission line and a spatial acoustic coupling path is identified by arranging a coefficient only to a tap of the adaptive filter correspo...
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JP2887501B2 |
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JP2885612B2 |
In an interference cancellation apparatus for use in combination with a diversity receiving system, the apparatus includes first and second transversal filter means, first and second control means, third transversal filter means, third c...
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JP2885618B2 |
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JPH11112290A |
To reduce or prevent the cross talk of adaptation against noise or adaptation by noise by selecting the size of a valid step in accordance with the non-linear function of the instantaneous noise ratio against a signal of an input signal....
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JPH11112291A |
To generate the pseudo transmission signal of less square average error by generating the pseudo transmission data of a prescribed section through the use of a specified tap coefficient. In an adaptive equalizing method for generating ps...
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JP2885269B2 |
An rms value of a sum signal series x = en + nu n calculated by adding a noise series to an error signal series of a known signal series and an unknown signal series, is calculated by an rms calculator. By means of an amplitude controlle...
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JP2885041B2 |
An arithmetic circuit for adaptive equalizer of Least Mean Square (LMS) algorithm. Includes a real operation part computing a first product between a real part signal of a data sequence and a product of a real part signal of an error seq...
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JP2882117B2 |
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JP2881960B2 |
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JP2882170B2 |
An apparatus for active reduction of noises transmitted from a noise source into a space. The active noise reduction apparatus comprises residual noise sensors for detecting the residual noises in the space. A reference signal is produce...
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JP2882364B2 |
In accordance with the present invention, for noise cancellation, a reference noise signal is input to signal-to-noise (SN) power ratio estimating circuitry via a reference signal input terminal. The SN power ratio estimating circuitry c...
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JP2880050B2 |
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JP2876874B2 |
An apparatus for reducing periodical noises transmitted from a noise source into a vehicle passenger compartment. The apparatus comprises control sound sources for producing control sounds in the vehicle passenger compartment, residual n...
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JP2876856B2 |
A method and apparatus of estimating a data sequence transmitted using a Viterbi algorithm, are disclosed. Sampled values of incoming data are acquired at a predetermined time interval into a memory. Subsequently, a plurality of sampled ...
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JP2877722B2 |
In response to a received carrier wave modulated in accordance with a digital signal, a digital radio receiver recovers in digital form a modulating signal that is at times subject to undesirable amounts of multipath distortion. This rec...
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JPH1185166A |
To prevent the accumulation of errors without the output of fresh noise with an active noise controller having a function capable of correcting the coefft. of an error route filter during a noise control operation in compliance with the ...
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JPH1188208A |
To suppress plural interference waves and to reduce a producing cost through the use of only two element antenna by outputting a sum signal and a difference signal from the received signals of two antennas so as to output a difference si...
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JPH1188091A |
To provide a satisfactory target audio signal even if the audio transmission characteristic of an audio system is non-linear. A speaker 22 is driven by an input signal xk and a microphone 23 provided in the desired place of the space col...
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JP2874679B2 |
A noise canceler of the present invention is of the type including an adaptive filter for generating a pseudo noise signal, subtracting the pseudo noise signal from a received signal to thereby output an error signal, and sequentially co...
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JP2870359B2 |
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JP2870440B2 |
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JP2870333B2 |
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JP2871519B2 |
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JP2872547B2 |
An active controller suppressing an incoming acoustic wave by active control includes a signal processing unit filtering, an input signal corresponding to the incoming acoustic wave to generate an output signal, an error detecting portio...
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JP2872545B2 |
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JP2868859B2 |
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JPH1168518A |
To keep estimation error constant even at the time of disturbance variations, such as in double talk by controlling a block length in an addition normalization LMS method, so that an estimation error estimating circuit executes coefficie...
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JP2865681B2 |
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JP2865853B2 |
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JP2861238B2 |
A digital signal encoding apparatus includes a circuit (10) in which an allowable noise level is set for each of plural frequency bands of an input digital signal on the basis of the energy from one band to another, and a quantization ci...
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JP2860026B2 |
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JP2861888B2 |
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JP2861282B2 |
A circuit for detecting a wave distortion in a circuit for eliminating a ghost wave component, wherein a received video signal is applied to a transversal filter, a reference signal for cancelling a ghost signal (GCR signal) is taken out...
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JP2858508B2 |
PURPOSE: To realize elimination of a broad band interference wave and of a multi-path distortion without damaging the diversity effect. CONSTITUTION: A transmitter 11 sends radio frequency signals of V and H polarized waves having a dela...
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JP2590783Y2 |
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JPH1145100A |
To provide a filtering method including two filters which can be used as a reinforced filter of a mix excitation linear prediction voice coder or a post filter of a code book excitation linear prediction voice coder. A first filter 62 ha...
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JPH1146112A |
To obtain the interference suppression device with a high speed interference wave suppression characteristic without increasing the scale of hardware by adjusting the initial value of board of an adaptive filter in response to the state ...
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JPH1138058A |
To measure the delay time of an incoming wave. The inverse matrix Rex-1 of an auto-correlation matrix of QNd order reception baseband signal vector is obtained (43) from a delay reception baseband signal group which is composed by severa...
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JP2856113B2 |
An echo canceller includes echo signal canceling sections, first level detection sections, second level detection sections, third level detection sections, and priority decision section. The echo signal canceling sections are independent...
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JP2589738Y2 |
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JPH1124690A |
To extract only the voice of a speaker from sound receiving signals including the voice of the speaker and noise by providing a second sound receiver for receiving only the sound which is produced by vibration of a human body generated w...
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JPH1127799A |
To provide a sound image controller that provides less sense of incongruity, even in the case that a listening position deviates from an optimum listening position. A sound image controller, that employs two loudspeakers for generating a...
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JPH1127800A |
To select an optimum stereophonic processing means depending on the performance of a processing unit in use, in the case of generating a stereophonic sound aiming at the reproduction by a multimedia personal computer or an audio peripher...
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JPH1127100A |
To decide the impulse response of a channel with higher accuracy and to equalize the channel regardless of the quantization noise of a CODEC. This method obtains an estimation value of probability distribution of a quantization noise in ...
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