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Class 708/304 - Nonlinear (e.g., median, etc.)


Subclass of Class 708 - Electrical computers: arithmetic processing and calculating
Definition: Subject matter wherein the relationship between the pertinent
No. of patents: 64
Last issue date: 05/01/2012


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NumberTitleIssue Date
8171069Streaming digital data filter
A method of filtering streaming digital data in real time. The method including: (a) initializing and storing a set of m data elements and an associated set of m pointer data from 1 to m in sequence, m an integer greater than 2; (b) receiving in real time a first or...
05/01/2012
8051120Circuit and design structure for a streaming digital data filter
A circuit and design structure for a streaming digital data filter embodied in a machine readable medium, the design structure including: a data processing unit and a pointer processing unit, the data processing unit and the pointer unit connected to a control logic...
11/01/2011
8015225Multi-step non-linear time-discrete processing
A non-linear processing device (1) is presented, in which fractional-delay filtering (20)—fractional as compared with a sample rate used in the processing steps—is used between successive processing steps (10). A corresponding method is also...
09/06/2011
8005881Scalable architecture for rank order filtering
A rank order filter and instantiation thereof in programmable logic is described. A maximum filter core frequency is determined for an input sampling frequency, a filter window height, and a number of input samples. The maximum filter core frequency is greater than ...
08/23/2011
7613759Low-complexity nonlinear filters
Processing an input signal that includes an input variable is disclosed. The input variable is compared to a set of ordered constants, the relative location of the input variable within a range of possible inputs is determined and a filter coefficient of a nonlinear...
11/03/2009
7461112Signal processor, signal processing method, signal processing program, recording medium with the signal processing program recorded therein and measuring instrument
A digital signal value is divided to a plurality of zones along a route. A median is computed based on a difference between a digital signal value and a sum of squares of each component of a filter output value for the digital signal values for each zone. A weightin...
12/02/2008
7444365Non-linear digital rank filtering of input signal values
Input values are non-linearly digitally filtered to produce as an output value the Rth-largest value among the K input values, wherein the Rth-largest value may be the median value with R=(K+1)/2. The input values are provided in any binary fix...
10/28/2008
7403666Apparatus and method of filtering digital information
A filtering apparatus calculates a median of image data that includes nine pixel values arranged in a window of 3*3. First, an input circuit receives as an input the image data, divides the data into groups each having three pixels, and outputs. The pixel values of ...
07/22/2008
7373367Efficient digital filter design tool for approximating an FIR filter with a low-order linear-phase IIR filter
A method and apparatus for designing low-order linear-phase IIR filters is disclosed. Given an FIR filter, the method utilizes a new Krylov subspace projection method, called the rational Arnoldi method with adaptive orders, to synthesize an approximated IIR filter ...
05/13/2008
7356197Variable tap filter architecture for image processing
An embodiment of the present invention is an apparatus to filter two-dimensional (2-D) data. A first filter processes two-dimensional (2-D) data in a block of pixels in a first dimension for a plurality of filter sizes. The block has a swath. A register file stores ...
04/08/2008
7260593Device for determining the rank of a sample, an apparatus for determining the rank of a plurality of samples, and the irank ordered filter
A rank-determining device determines the rank of a particular sample value from a set of digital sample values by utilizing two different thresholders that are implemented by comparators. The rank of the sample value is decomposed by thresholding the sample value wi...
08/21/2007
7242808Method and apparatus for analysis of variables
Various components of the present invention are collectively designated as Analysis of Variables Through Analog Representation (AVATAR). It is a method, processes, and apparatus for measurement and analysis of variables of different type and origin. AVATAR offers an...
07/10/2007
7219111Numeric value search apparatus and numeric value search method
The objective is to realize a numeric value search apparatus and numeric value search method capable of rapidly searching for a numeric value of a prescribed rank. The present invention is characterized in that it comprises the following: a storage unit which...
05/15/2007
7181085Adaptive multistage wiener filter
A computationally efficient, adaptive multistage Wiener filter employs two modules, a linear filter module that operates at the input data rate and an update module that operates at a plurality of rates but performs many calculations at only the update rate. This fi...
02/20/2007
7152081Methods for efficient filtering of data
An apparatus and method for filtering data that include retrieving a plurality of data samples from memory; computing a locus of the samples; computing a distance between an input value and the locus; comparing the distance between the input value and the locus with...
12/19/2006
7151796High performance equalizer with enhanced DFE having reduced complexity
An apparatus and method for implementing an equalizer which (1) combines the benefits of a decision feedback equalizer (DFE) with a maximum-a-posterori (MAP) equalizer (or a maximum likelihood sequence estimator, MLSE) (2) performs equalization in a time-forward or ...
12/19/2006
7133568Method and apparatus for analysis of variables
Various components of the present invention are collectively designated as Analysis of Variables Through Analog Representation (AVATAR). AVATAR offers an analog solution to those problems of the analysis of variables which are normally handled by digital means. The ...
11/07/2006
7079574Carrier phase recovery system for adaptive burst modems and link hopping radio networks
A method for a carrier phase recovery apparatus in a multiple-link hopping radio system includes hopping among a plurality of radio links to receive bursts of radio signals on the plurality of radio links and determining channel information for each radio link from ...
07/18/2006
7072928Device for determining the rank of a sample, an apparatus for determining the rank of a plurality of samples, and the irank ordered filter
A rank-determining device determines the rank of a particular sample value from a set of digital sample values by utilizing two different thresholders that are implemented by comparators. The rank of the sample value is decomposed by thresholding the sample value wi...
07/04/2006
7058220Method and system for processing images using histograms
A method and system are disclosed for processing images using histograms. In accordance with exemplary embodiments of the present invention, first image data is received for a first image. A first histogram of the first image is generated using the first image data....
06/06/2006
7051058Method and device for filtering a signal
A method and a device are described for filtering a variable. A first filtering arrangement is used for forming an output variable as a function of an input variable, the first filtering arrangement having at least a delaying effect. The input variable of the first ...
05/23/2006
7050647Median filter
A median filter using an M×N window sorts M×N pixel data along each column in descending order to generate N data strings, each having M sorted pixel data. The N data strings are sequentially stored in a shift register. Data strings in different stages of the shif...
05/23/2006
7039665Efficient reconstruction
Efficient reconstruction of a discrete signal in a range from subband coefficients of multirate analysis filtering translates the range into required input coefficient ranges and minimizes computation and memory access. ...
05/02/2006
7020590Simulation of di/dt-induced power supply voltage variation
A mechanism is disclosed for determining a voltage at a device in a power delivery network. The mechanism includes determining an impulse response for the power delivery network, and tracking the current consumed by the device as it operates over a sequence of clock...
03/28/2006
7003535Median determination apparatus and method
The present invention is of a method and apparatus for processing an image comprising a data set of size M (more generally, for determining the median of any data set of size M), comprising receiving each value of the data set as a weighted set of binary digits; add...
02/21/2006
6959167Noise-level adaptive residual echo suppressor
An improved echo control system has an adaptive controlled echo canceling filter arrangement in which a background filter updates the filter coefficients of an echo shaping filter responsive to a normalized least mean square (NLMS) algorithm. An adaptive control mod...
10/25/2005
6944352Circuitry for determining median of image portions
Hardware circuit for median calculation in an active pixel sensor. ...
09/13/2005
6941332Implantable medical device fast median filter
A method for fast median filtering in an implantable medical device is disclosed that provides rapid filtering using computational mechanisms with following elements. A new sample value is received into a buffer. An oldest sample value location is identified in a MI...
09/06/2005
6904390Method, computer program, and system for automated real-time signal analysis for detection, quantification, and prediction of signal changes
A method, computer program, and system for real-time signal analysis providing characterization of temporally-evolving densities and distributions of signal features of arbitrary-type signals in a moving time window by tracking output of order statistic filters (als...
06/07/2005
6901355Method for correcting non-linearities of an output signal of an electrical component, particularly a measuring transducer
A method for correcting non-linearities of an output signal of an electrical component with the aid of a characteristics map that is defined by discrete interpolation points. In this context, the adjacent interpolation points of the characteristics map are ascertain...
05/31/2005
6771835Two-dimensional non-linear interpolation system based on edge information and two-dimensional mixing interpolation system using the same
A 2-dimensional non-linear interpolation system and method based on edge information includes an edge detector, an edge direction modifier, a near-edge coefficient generator, a filter coefficient generator and a non-linear interpolation unit. The edge detector detec...
08/03/2004
6754684Method and apparatus for median filter on SIMD architecture digital data processor
The invention provides improved methods and systems for rapidly performing a median filter calculation for a value at a predetermined position in a matrix of values representing a neighborhood about the predetermined position. The method includes ordering the values...
06/22/2004
6731820Image filter circuit and image filtering method
An image filter circuit which realizes a large-scale median filter as a digital circuit which has not been conventionally constructed without difficulty. The filter circuit has a histogram A update unit 102 which generates a histogram A with upper-bit data of...
05/04/2004
6687413Signal processing apparatus
A system to minimize the number of comparison and rearrangement operations and increase the processing speed with a small circuit scale utilizing a median filter in the form of hardware. A signal processing apparatus for performing, when a region to be su...
02/03/2004
6628707Adaptive equalizer system for short burst modems and link hopping radio networks
A method for an adaptive equalization apparatus in a multiple-link hopping radio system includes hopping among a plurality of radio links to receive variable-length bursts of radio signals on the plurality of radio links and equalizing amplitude and phase...
09/30/2003
6546148Circuitry for determining median of image portions
Hardware circuit for median calculation in an active pixel sensor....
04/08/2003
6345075Process and device for the increase of subscriber capacity in a cellular mobile radio network
For each K subscriber of a cellular mobile radio network who is supplied with one and the same frequency and one and the same time slot a decision-feedback and therefore non-linear antenna pre-processing facility with a decision-feedback structure is used...
02/05/2002
6208764Rank filter using a linked-list to link elements in a memory array in numerical order
A rank filter suitable for use in real-time signal processing and image processing applications, for example, for improving an image. The rank filter can be implemented in software or hardware, employed in single- and multi-dimensions, and within any spec...
03/27/2001
6199084Methods and apparatus for implementing weighted median filters
Methods and apparatus for efficiently implementing weighted median filters are described. In a first hardware embodiment, the median filter is implemented using a number of storage locations which is equal to or greater than the sum of the weight values u...
03/06/2001
6175848Variable accumulation correlators
This invention provides apparatus and methods for obtaining information for aligning a reference signal with a received signal for global positioning satellite receivers which employs at least one correlator for correlating the received signal with the re...
01/16/2001
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