Patents for H03H 21 - Adaptive networks (3,855)
10/1990
10/04/1990DE4007226A1 Adaptive rauschunterdrueckungsanordnung Adaptive rauschunterdrueckungsanordnung
09/1990
09/04/1990US4954732 Adaptive nonlinear frequency domain filter with low phase loss
08/1990
08/22/1990EP0383360A2 Adaptive recognising device
08/21/1990US4951269 Echo canceller with short processing delay and decreased multiplication number
08/16/1990DE4001747A1 Adaptable high pass filter assembly - has controllable cut=off frequency, and passes selectively signal components of higher frequencies
08/07/1990US4947480 Multichannel signal enhancement
08/07/1990US4947363 Pipelined processor for implementing the least-mean-squares algorithm
08/07/1990US4947362 Digital filter employing parallel processing
08/07/1990US4947361 Narrowband parameter estimator
08/01/1990EP0379766A1 Video processing in which high frequency luminance components are folded into a mid-band spectrum
07/1990
07/24/1990US4943849 Television transmission system having improved separation of audio and video spectra
07/18/1990EP0377913A2 Adaptive digital filter which is responsive to the rate of change of an input signal
07/11/1990EP0377300A2 Transversal and recursive filters
07/10/1990US4940977 Adaptive-filter single-bit digital encoder and decoder and adaptation control circuit responsive to bit-stream loading
07/10/1990CA1271530A1 Adaptive digital filter
07/03/1990US4939749 Differential encoder with self-adaptive predictive filter and a decoder suitable for use in connection with such an encoder
07/03/1990US4939685 Normalized frequency domain LMS adaptive filter
06/1990
06/27/1990CN1008584B Adaptive equalizer
06/20/1990EP0373468A2 A pipelined processor for implementing the least-mean-squares algorithm
06/12/1990CA1270322A1 Adaptive comb filter
06/06/1990EP0371567A2 Echo canceller
06/05/1990US4931977 Vectorial adaptive filtering apparatus with convergence rate independent of signal parameters
05/1990
05/22/1990US4928287 Automatic equalizer
05/16/1990EP0368013A1 Circuit for an adaptive comb filter for separating the luminance and chrominance signals of a composite PAL or NTSC video signal
05/03/1990WO1990004906A1 Adaptive pal or nstc comb filter
04/1990
04/24/1990US4920530 Adaptive time-discrete filter for forming a cancelling signal from synchronous data symbols
04/18/1990EP0363551A1 Adaptive equalization for recording systems using partial-response signaling
04/17/1990US4918515 Compatible television transmission system with separate preemphasis path within single channel
04/03/1990US4914639 Sonar doppler system with a digital adaptive filter
03/1990
03/21/1990EP0358757A1 Measurement of the variation in time of a periodic signal
03/20/1990CA1266893A1 Frequency-domain block-adaptive digital filter
03/14/1990EP0358453A2 Digital luminance/chrominance separation apparatus
03/08/1990WO1990002447A1 Signal processing means for sensing a periodic signal in the presence of another interfering periodic noise
03/08/1990WO1990002380A1 Selective active cancellation system for repetitive phenomena
03/07/1990EP0356903A2 Television transmission system having improved separation of audio and video spectra
02/1990
02/28/1990EP0356088A2 Improvements relating to colour television signal processing
02/20/1990US4903247 Digital echo canceller
02/20/1990CA1266104A1 Arrangement for compensating for non-linear distortion in an input signal to be digitized and an echo cancelling system comprising such an arrangement
02/13/1990CA1265854A1 Adaptive filter for producing an echo cancellation signal in a transceiver system for duplex digital communication through one single pair of conductors
02/13/1990CA1265847A1 Adaptive time-discrete filter for forming a cancelling signal from synchronous data symbols
02/06/1990CA1265594A1 Echo cancellers for bidirectional digital transmission systems
01/1990
01/24/1990EP0351843A2 Digital adaptive filter and method of convergence therein
12/1989
12/27/1989EP0348163A2 Compatible television transmission system with separate pre-emphasis path within single channel
12/27/1989EP0348100A2 Phase jitter compensation arrangement using an adaptive IIR filter
12/20/1989EP0347394A1 Adaptive, digital filter including a non-recursive part and a recursive part
12/20/1989EP0347038A2 DTMF receiver
12/20/1989CN1038193A Adaptive, digital filter including non-recursive part and recursive part
12/14/1989WO1989012360A1 Adaptive, digital filter including a non-recursive part and a recursive part
12/13/1989EP0345675A2 Hybrid stochastic gradient for convergence of adaptive filters
12/06/1989EP0344579A1 Device for reducing noise and cross-colour in television signals
11/1989
11/23/1989EP0342782A2 Electroacoustic system with electronic filters
11/21/1989US4882668 Adaptive matched filter
11/09/1989DE3807147A1 Verfahren und anordnung zur messung des zeitlichen verlaufs eines periodischen signals mit hoher zeitaufloesung nach einem boxcar-aehnlichen verfahren The method and process arrangement for measuring the temporal course of a periodic signal with high time resolution according to a similar boxcar
11/02/1989WO1989008266A3 Measurement of the variation in time of a periodic signal
11/02/1989EP0339819A2 Electronic filter
10/1989
10/31/1989US4878188 Selective active cancellation system for repetitive phenomena
10/11/1989EP0336684A2 Noise reduction in the playback of recorded sound
09/1989
09/27/1989EP0334714A1 Differential coder with a self-adaptive filter, and decoder for said coder
09/26/1989CA1261008A1 Adaptive transversal filter
09/26/1989CA1260553A1 Digital filters
09/19/1989US4868775 Adaptive digital filter
09/19/1989US4868650 Circuitry for expanding the effect of a video control signal in multiple dimensions
09/19/1989EP0316402A4 A fast median filter.
09/13/1989EP0332079A2 Adaptive equalizer system
09/12/1989US4866648 Digital filter
09/08/1989WO1989008266A2 Measurement of the variation in time of a periodic signal
08/1989
08/29/1989US4862449 Adjustable echo canceller
08/24/1989WO1989007864A1 Multipath reduction system
08/08/1989CA1258301A1 Non-linear adaptive filters
08/02/1989EP0325590A1 Circuitry for converting measurement signals disturbed by a disturbance function into undisturbed signals.
07/1989
07/25/1989US4852036 Adaptive digital filter and an echo canceler incorporating the same
07/25/1989CA1257914A1 Adaptive automatic equalizer
07/19/1989EP0324029A1 Adaptive noise cancellation in a closed loop control system
07/11/1989US4847864 Phase jitter compensation arrangement using an adaptive IIR filter
07/11/1989US4847682 Adaptive comb filter for artifact-free decoding
07/04/1989US4845758 Equalizer with adjustable band filters and a digital filter suitable for use in the equalizer
06/1989
06/28/1989EP0322060A2 Adjusting filter coefficients
06/27/1989US4843583 Nonlinear adaptive filter
06/21/1989EP0321045A2 Adaptive comb filter for artifact-free decoding
05/1989
05/24/1989EP0316402A1 A fast median filter
05/23/1989US4833691 Line equalizer
05/23/1989US4833634 Multipurpose adaptive filter
05/23/1989US4833399 DTMF receiver
05/16/1989US4831463 Video processing in which high frequency luminance components are folded into a mid-band spectrum
05/10/1989CN1032890A Adaptive-filter single-bit digital encoder and decorder and adaptation control circuit responsive to bit-stream loading
05/09/1989US4829299 Adaptive-filter single-bit digital encoder and decoder and adaptation control circuit responsive to bit-stream loading
04/1989
04/13/1989DE3733132A1 Circuit arrangement for acoustic compensation of the ambient noise in the case of headphone (earphone) reception
04/11/1989US4821037 Wideband adaptive array using the chirp transform
03/1989
03/29/1989EP0308826A2 Adaptive-filter single-bit digital encoder and decoder with adaptation control circuit responsive to bitstream loading
03/29/1989EP0308501A1 Digital adaptive filter
03/28/1989US4817081 Adaptive filter for producing an echo cancellation signal in a transceiver system for duplex digital communication through one single pair of conductors
03/22/1989EP0307453A1 I-q channel adaptive line enhancer
03/21/1989CA1251527A1 Adaptive stop-notch filter
03/15/1989EP0307035A2 Adjusting filter coefficients
03/15/1989CN1031166A Adjustable echo canceller
03/07/1989US4811261 Adaptive digital filter for determining a transfer equation of an unknown system
03/07/1989CA1250910A1 Asynchronous and non-data decision directed equalizer adjustment
02/1989
02/28/1989CA1250657A1 Adaptive filtering system
02/21/1989US4807173 Frequency-domain block-adaptive digital filter
02/21/1989CA1250348A1 Adaptive noise suppressor
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