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Patent Searching and Data


Matches 251 - 300 out of 5,204

Document Document Title
WO2000005598A9
A family of multiple scale adaptive filters (20) and filtering methods (20) that automatically adapt their impulse response width to local data characteristics, optimizing the accuracy, yield, and/or detail of interferometric measurement...  
WO/2000/055969A1
A method and apparatus (100) is provided for impedance matching for a system capable of supporting voice and data bands. The method includes receiving an input signal having a voice and data band, filtering at least a portion of the data...  
WO/2000/054404A1
Device and method for separating a mixture of source signals to regain the source signals, the device and method being based on measured signals, the invention comprises: bringing each measured signal to a separation structure including ...  
WO/2000/051234A1
The invention relates to a method for improving the useful signal power/ disturb signal power ratio of an antenna (ANT), comprising at least one sensor (C¿1?-C¿N?), characterized in that said method consists in filtering the signal del...  
WO/2000/046802A1
High-order partial response is equalized so that the equalization difference of an input signal having nonlinear distortion is a minimum so as to improve the characteristics of a reproduced signal. An input signal is subjected to high-or...  
WO1997042742A3
A transmitter is disclosed for transmitting a digital information signal having a specific first sampling frequency (fs1) via a transmission medium. The digital information signal is lowpass filtered (10) and down sampled (12) so as to o...  
WO2000019605A3
An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwid...  
WO/2000/038319A1
Stable adaptive filter and method are disclosed. The invention solves a problem of instability associated with Fast Affine Projection adaptive filters caused by error accumulation in an inversion process of an auto-correlation matrix. Th...  
WO/2000/030264A1
A method of processing signals received from an array of sensors is disclosed comprising the steps of sampling and digitally converting the received signals and processing the digitally converted signals to provide an output signal, the ...  
WO/2000/025489A1
Parameters of a technical system are determined, wherein output signals consisting of a plurality of superimposed, statistically independent input signals can be detected. Parameters are detected in such a way that the statistical depend...  
WO2000005598A3
A family of multiple scale adaptive filters (20) and filtering methods (20) that automatically adapt their impulse response width to local data characteristics, optimizing the accuracy, yield, and/or detail of interferometric measurement...  
WO/2000/019605A2
An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwid...  
WO/2000/013314A1
A method and apparatus for updating a precoder coefficients having a duplicate precoder (440) and a correction filter (450) in a receiver, where the correction filter (450) generates incremental coefficients. The incremental coefficients...  
WO/2000/008836A1
The invention concerns a device for processing digital data comprising a module (M2, M3) producing on a data vector of the frequency domain Z(k), wherein k varies from 0 to N-1, a convolution with a function U, convolution which correspo...  
WO/2000/008837A1
Methods and apparatus for echo and noise cancelation contemplate occasional saturation of an echo and/or noise containing source signal and control adaptation of a cancelation filter to minimize the detrimental effects of such source sig...  
WO/2000/005598A2
A family of multiple scale adaptive filters (20) and filtering methods (20) that automatically adapt their impulse response width to local data characteristics, optimizing the accuracy, yield, and/or detail of interferometric measurement...  
WO/2000/004698A1
To achieve an improved convergence behaviour for, e.g., echo cancellation there is provided a digital adaptive filter comprising a filter coefficient update means (52; 78) to successively update filter coefficience in accordance with an ...  
WO/1999/066638A1
This invention unifies a set of statistical signal processing, neuromorphic systems, and microelectronic implementation techniques for blind separation and recovery of mixed signals. A set of architectures, frameworks, algorithms, and de...  
WO1999053615A3
Device and method for reduction of signal transients, where the signal is divided into frequency bands, the device at least comprising a transient detector (1), a calculating means, means for delaying a signal (2) and an adaptive filter....  
WO1999044286A3
A digital filter (1) has a filter cell (4a) for generating processed data. The digital filter cell includes plurality of coefficient registers (14) which are arranged to circulate a plurality of coefficient values that correspond to a pl...  
WO/1999/059336A1
The invention relates to a data processing device for recovering digital data which is received in an analogue transmitted signal. According to the invention, the received signal is digitized and a threshold is determined in a threshold ...  
WO/1999/059245A1
The invention relates to a method for calculating a least mean square algorithm using an N-tap filter. A modified least mean square algorithm is used for the calculation. In a first calculation step, calculation is effected using a first...  
WO/1999/054996A1
A digital filter includes a plurality of filter cells, each of which includes circuitry to determine a coefficient for the filter cell, to adjust the coefficient in accordance with a gain that is used by each of the plurality of filter c...  
WO/1999/053476A1
An active noise controller for muffling noise by giving forth pseudo-noise having the same amplitude as that of the noise and an opposite phase to that of the noise from a loudspeaker and acoustically superposing the pseudo-noise on the ...  
WO/1999/053615A2
Device and method for reduction of signal transients, where the signal is divided into frequency bands, the device at least comprising a transient detector (1), a calculating means, means for delaying a signal (2) and an adaptive filter....  
WO/1999/052211A1
A method and apparatus that performs blind source separation usign convolutive signal decorrelation. More specifically, the method accumulates a length of input signal (mixed signal) that comprises a plurality of independent signals from...  
WO/1999/044286A2
A digital filter (1) has a filter cell (4a) for generating processed data. The digital filter cell includes plurality of coefficient registers (14) which are arranged to circulate a plurality of coefficient values that correspond to a pl...  
WO/1999/039497A1
A beamformer is calibrated for use as an acoustic echo canceler in a hands-free communications environment having a loudspeaker and a plurality of microphones. To perform the calibration, a number of adaptive filters are provided in corr...  
WO/1999/038155A1
The invention relates to the coding of speech at a variable bit rate, whereby the bit rates can vary from frame to frame, and more specifically to the methods and filters used for improving the quality of the decoded speech. In the solut...  
WO/1999/038029A1
The invention relates to a signal-echo surveillance device, comprising at least one transmitting unit for emitting a signal, a receiving unit for receiving an echo signal of the emitted signal reflected by an object, and a control and ev...  
WO/1999/029094A1
A novel method and apparatus are disclosed for cancelling echoes originating from a digital mobile handset using an echo canceller (10) located in the network. The method and apparatus thus solve a practical echo problem that many mobile...  
WO/1999/026401A1
An echo canceller circuit (25) for use in an echo canceller system is set forth that provides sensitive non-linear echo path response detection (300). The echo canceller circuit (25) comprises a first digital filter (35) having non-adapt...  
WO/1999/026400A1
An echo canceler circuit (25) for use in an echo canceller system is set forth. The echo canceller circuit (25) comprises a first digital filter (35) having non-adaptive tap coefficients to simulate an echo response occurring during a ca...  
WO/1999/026402A1
An echo canceller circuit (25) for use in an echo canceller system is set forth. The echo canceller circuit (25) comprises a first digital filter (35) having non-adaptive tap coefficients to simulate an echo response occurring during a c...  
WO/1999/026355A1
An acoustic echo canceller (AEC) is devised and tested in a real environment. The devised AEC puts together a number of available digital signal processing methods to make a real-time implementation of the AEC possible. The echo length c...  
WO/1999/026399A1
An echo canceller circuit (25) is set forth. The echo canceller circuit (25) includes a digital filter (30) having adaptive tap coefficients to simulate an echo response occurring during a call. The adaptive tap coefficients are updated ...  
WO1999016170A3
Method for separating at least two signals from a mixture of signals, in which method the number of different mixtures is at least as great as the number of signals to be separated, the method comprising a modified criterion based on a c...  
WO/1999/018666A1
A new signal processing method and a signal processing engine which can achieve extremely fast responsiveness to instantaneous changes in the behavior of the signal, and maintain the accuracy of standard harmonic methods. The signal proc...  
WO/1999/016170A2
Method for separating at least two signals from a mixture of signals, in which method the number of different mixtures is at least as great as the number of signals to be separated, the method comprising a modified criterion based on a c...  
WO1998059418A3  
WO/1999/010715A1
A method and an apparatus for distinguishing systematic artefacts from noise involves localising functional noise in the vicinity of predicted functional peaks. The method is particularly relevant to detection and tracking of time-varyin...  
WO/1999/007071A1
An adaptive filter is provided which has fixed point or floating point data stored in a data RAM (74) and block scale floating point coefficients stored in a coefficient RAM (84). The data and coefficients are utilized in a filter algori...  
WO/1998/059418A2
A blind equalization method and adaptive filter device is presented which provides for optimal performance with minimal computational complexity. Recognizing that all realizable filters have residual noise characteristics, the optimizati...  
WO/1998/058450A1
A set of generalized architectures, frameworks, algorithms, and devices for separating, discriminating, and recovering original signal sources by processing a set of received mixtures and functions of said signals based on processing of ...  
WO1998042082A3  
WO/1998/053595A1
In order to reduce acoustic echo and restore stereophonic sound in a digital transmission system of sound signals on P transmission channels, between a local site and one or several remote site(s), comprising several microphones and loud...  
WO/1998/052282A1
An efficient implementation of a multirate filter with delayed error feedback is disclosed. The multirate filter prevents the instruction processing rate requirement from increasing by performingthe interpolation and decimation in the LM...  
WO/1998/047227A1
A dual-processing interference cancelling system and method for processing a broadband input in a computationally efficient manner. Dual processing divides the input into higher and lower frequency bands and applies adaptive filter proce...  
WO/1998/042082A2
The invention relates to a method and arrangement for forming an address, the arrangement being used for forming a corrector table (130) address employed in signal predistortion that is used for compensating for signal distortions. The d...  
WO/1998/042083A1
A method of coding an audio signal comprises receiving an audio signal $i(x) to be coded and transforming the received signal from the time to the frequency domain. A quantised audio signal $i(x) is generated from the transformed audio s...  

Matches 251 - 300 out of 5,204