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5838599 Method and apparatus for nonlinear exponential filtering of signals  
The present invention is directed to a method and apparatus for filtering a signal of a control and/or signal processing system in a manner which achieves both rapid tracking of signal transients...
5835887 Process for the rapid digital acquisition and processing of analogue measured values in a processor with restricted binary word length  
In acquisition devices for analog measured values (Ue1 . . . Uen), there is frequently the problem that the digital processor (P) of said devices has a restricted binary word length (WP), as...
5831880 Method for processing a signal in a CSD filter and a circuit therefor  
A method for processing a signal in a CSD filter includes the steps of obtaining real coefficients optimized to desired filter characteristics, calculating scaling factors for each real...
5828589 Self-adaptive trans-hybrid balance filter  
An adaptive balance filter includes a transmission path, a reception path, and an adaptive filter having a signal output, a coefficient output for outputting filter coefficients, an error signal...
5828570 Unconstrained 2-D transformation filter  
An unconstrained transformation filter operator that is efficient in terms of computer resources and that improves circularly symmetric migrated impulse response for steep dips. The filter...
5825809 Digital filter having an energy level detector for selecting a coefficient  
There is provided a base-band filter for use in a transmitter of a DS-CDMA system. The filter includes data storage for storing a plurality of sample data which are generated by the input signal...
5825310 Signal encoding method  
A signal encoding method for real-time encoding an acoustic signal using a small hardware. The spectral signal components of an input signal are split into encoding units as the units for...
5821533 Automatic pulse top optimization circuit for an ionizing radiation spectroscopy system  
An automatic pulse top optimization circuit for an ionizing radiation spectroscopy system includes a conversion circuit, responsive to random analog input pulses passing through the system, for...
5815030 Circuit for filtering a signal and integrated circuit comprising such a circuit  
A circuit for the filtering of a pulse signal comprises means to detect an output pulse upon the detection of an input pulse, the shape of this output pulse being based on elementary delays...
5801652 Pattern dependent noise reduction in a digital processing circuit utilizing image circuitry  
A delta-sigma analog/digital converter is provided for operating in the analog domain to generate a digital value that is to be processed by a digital signal processor (DSP) (26) to provide on the...
5798948 Method and apparatus for video filtering  
A method and apparatus for video filtering filters video frames by determining a set of frames to be used to generate a single filtered frame. This set of frames is then combined to generate a...
5799046 Digital data signal reproducing apparatus  
A digital data signal reading and reproducing apparatus which can accurately read and reproduce a digital data signal recorded on a recording medium at a high density. There is performed a Viterbi...
5796637 Apparatus and method for filtering event signals  
A system for filtering multiple event signals from multiple event-generating sources. A selection circuit receives the multiple event signals and selects one of the event signals. A filter circuit...
5796643 Logical operator based digital filter  
A digital filter with a reduced filtering time. On/off data provided by eight contacts are read at predetermined time intervals, and the on/off data are stored in 8-bit binary data. (four-to...
5793656 Application-specific integrated circuits having programming functions  
An application-specific integrated circuit (ASIC) for performing a selected one of a plurality of programmable functions on one or more input signals. The ASIC includes a plurality of component...
5793824 Digital phase locked loop having adaptive bandwidth for pulse stuffing synchronized digital communication system  
A bandwidth-adaptive digital phase locked loop-based clock control arrangement controls the generation of a read-out clock used for retiming digital data signal interfaced with a synchronous data...
5790658 High performance echo canceller for high speed modem  
An architecture for echo cancellation in communication networks is provided that uses a multi-stage adaptation algorithm which operates on echo cancellation filters of different configurations....
5784296 Method and apparatus for spectral analysis in a disk recording system  
A method of performing spectral analysis of signals recorded by a magnetic recording or storage system is provided using a modified channel chip of the system. The modified channel chip enables...
5781460 System and method for chaotic signal identification  
A chaotic signal processing system receives an input signal provided by a nsor in a chaotic environment and performs a processing operation in connection therewith to provide an output useful in...
5777900 Filtering processor and filter method  
A filtering processor for performing filtering by use of an N-tap filter (N is a natural number) of this invention includes: means for transforming a first signal series having M1 signals (M1 is a...
5777909 High pass filter with coefficient switching to improve settling time  
A high pass filter is provided utilizing a digital filter with coefficients that can be switched to provide for two responses, a fast response and a slow response. A first response is provided by...
5774387 Tracking filter  
A tracking filter (10,80) which transitions from a type 2 loop to a type 1 loop as the loop error approaches 0 for fast settling and convergence without overshoot or ringing. The filter can either...
5771182 Bit-serial digital compressor  
A bit-serial compressor (106) has a pre-divider circuit (208) receiving input serial data and generating a partial numerator. Divider circuit (210) divides the partial numerator by a denominator...
5768165 Digital time signal filtering method and device for transmission channel echo correction  
A method for filtering a time signal (e(t)) sampled in blocks of N samples (e(n),e(k)) uses a transfer function defined in the frequency domain by LN samples (H(K)). The transfer function is...
5764551 Fast high-signal-to-noise ratio equivalent time processor  
The present invention generally relates to ultra high bandwidth, ultra high ample rate systems and more particularly to equivalent time sampling and signal reconstruction. The disclosed technique...
5745396 Pipelined adaptive IIR filter  
A pipelined adaptive infinite impulse response (PAIIR) filter is disclosed including an adaptive section and a non-adaptive section, where the PAIIR filter is responsive to first and second input...
5731769 Multi-rate digital filter apparatus and method for sigma-delta conversion processes  
Data converter (10, 50, 150, 200) and method (250, 300) operate at variable sampling rates. Input gain stage (12) adjusts input bit stream (18) at an input bit rate (20) to produce gain adjusted...
5732003 Sawtooth phase filter  
Noise may be reduced or eliminated from a digital sawtooth signal representing the phase of a periodic signal. This may be done precisely, even when inexpensive fixed-point arithmetic is used. In...
5724395 Method and apparatus for filtering digital signals  
A method of filtering digital signals having a high dynamic range includes splitting the sampled input signal into at least two portions addressing each of the portions to a respective program...
5721696 Method and system for performing an FIR filtering operation  
A method and system for an FIR filter are provided. A sequence of input signal is converted to a corresponding sequence of log signals. FIR filtering coefficients are then added to each log signal...
5721694 Non-linear deterministic stochastic filtering method and system  
A method and system for filtering a noisy input comprised of an information signal and a noise signal. No prior time domain value information or frequency domain parameter information on the...
5717619 Cost reduced time varying fir filter  
A method and apparatus for computing, in real time, the coefficients Cτ (n) of a time varying FIR filter according to an optimum singular value decomposition (SVD) algorithm. The coefficients of a...
5712807 Pulse analyzing method and apparatus  
A pulse analysing system for separating broadband wanted pulses of duration to include a predetermined plurality of data samples from a signal which also contains unwanted short signals, in which...
5701099 Transconductor-C filter element with coarse and fine adjustment  
A transconductor-C filter that has coarse and fine control mechanisms allowing for both high speed and high current filtering of the same signal. The filter uses a current controlled oscillator...
5701261 Dynamic filter  
Difficulty is experienced where filters are required to provide a high level of noise reduction and a fast step response in systems where a large input step in comparison to the final resolution...
5696699 Integrated cellular data/voice communication system working under one operating system  
A cellular communication system having all of its components operating under a single system control unit is provided so that the various components of the system can be adjusted as the parameters...
5691929 90-degree phase shift network, system for controlling a 90-degree phase shift characteristic of the network, linearizer using all-pass filters, and system for controlling the linearizer  
A 90-degree digital phase shift network includes at least two all-pass digital filters which have a phase difference of 90 degrees therebetween. These digital filters are adapted to receive the...
5687105 Processing device performing plural operations for plural tones in response to readout of one program instruction  
A digital signal processor (i.e., DSP) is employed by an electronic musical instrument. The contents of operational processes to be executed by the DSP can be arbitrarily set in accordance with...
5687104 Method and apparatus for generating decoupled filter parameters and implementing a band decoupled filter  
A method (100) and data processing system (120) for filtering unfiltered signals (134) to produce filtered signals (136) in accordance with desired filter control parameters (124). Adjusted filter...
5668895 Digital filter for image processing  
A digital filter for image processing which permits a reduction in the size of the circuit includes a plurality of bit shifters for multiplying each picture element data of a k×k matrix, each by a...
5669010 Cascaded two-stage computational SIMD engine having multi-port memory and multiple arithmetic units  
A two-stage cascaded processor engine for Digital Signal Processing (DSP) utilizing parallel multi-port memories and a plurality of arithmetic units, including adders and multiplier-accumulators...
5659585 Digital integrator and digital filter of the first order  
A filter uses a digital integrator that establishes the sum, weighted by a coefficient B, of q1-bit input data arriving at a frequency F. The integrator includes a first p-bit shift-right...
5654909 90-degree digital phase shift network and linearizer using all-pass digital filters  
A 90-degree digital phase shift network includes at least two all-pass digital filters which have a phase difference of 90 degrees therebetween. These digital filters are adapted to receive the...
5654989 Method and apparatus for symbol timing tracking  
An apparatus and method for symbol timing tracking has a decimation index input (42). The decimation index (42) is connected to an upper threshold limiter (44) and a lower threshold limiter (46)....
5652770 Sampled-data filter with low delay  
A filter system with low throughput delay having at least two parallel filters, either sampled-data or continuous, wherein one of the filters has a low throughput delay in comparison with the...
5648922 Digital filter  
An improved digital filter capable of advantageously completing a filter operation through a convolution using a filter coefficient used in each stage of multi-stage digital filters and previously...
5649065 Optimal filtering by neural networks with range extenders and/or reducers  
A method and apparatus is provided for processing a measurement process to estimate a signal process, even if the signal and/or measurement processes have large and/or expanding ranges. The method...
5640430 Method for detecting valid data in a data stream  
In a digital communication system, communication units may reduce power consumption while attempting to detect reception of valid data by sampling and filtering a data stream at a first sampling...
5636150 Data driven type digital filter unit and data driven type information processor including the same  
A data driven filter unit includes a register file including a plurality of registers, a first computing element group including a multiplier, a second computing element group including an...
5625267 Constant delay filtering for synchronized motion on multiple axes  
In a linear feedback servo control system, the motion profile for each axis is pre-filtered before it is introduced to the servo loop for that axis. The motion profile is pre-filtered by a filter...