Match

Document 
Document Title 

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 
Selfadaptive transhybrid 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 2D 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 baseband filter for use in a transmitter of a DSCDMA 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 realtime 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 deltasigma 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 eventgenerating 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 8bit binary data. (fourto... 

5793656 
Applicationspecific integrated circuits having programming functions
An applicationspecific 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 bandwidthadaptive digital phase locked loopbased clock control arrangement controls the generation of a readout 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 multistage 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 Ntap 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 
Bitserial digital compressor
A bitserial compressor (106) has a predivider 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 highsignaltonoise 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 nonadaptive section, where the PAIIR filter is responsive to first and second input... 

5731769 
Multirate digital filter apparatus and method for sigmadelta 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 fixedpoint 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 
Nonlinear 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 
TransconductorC filter element with coarse and fine adjustment
A transconductorC 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 
90degree phase shift network, system for controlling a 90degree phase shift characteristic of the network, linearizer using allpass filters, and system for controlling the linearizer
A 90degree digital phase shift network includes at least two allpass 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 twostage computational SIMD engine having multiport memory and multiple arithmetic units
A twostage cascaded processor engine for Digital Signal Processing (DSP) utilizing parallel multiport memories and a plurality of arithmetic units, including adders and multiplieraccumulators... 

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 q1bit input data arriving at a frequency F. The integrator includes a first pbit shiftright... 

5654909 
90degree digital phase shift network and linearizer using allpass digital filters
A 90degree digital phase shift network includes at least two allpass 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 
Sampleddata filter with low delay
A filter system with low throughput delay having at least two parallel filters, either sampleddata 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 multistage 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 prefiltered before it is introduced to the servo loop for that axis. The motion profile is prefiltered by a filter... 