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6061410 Frequency ratio estimation arrangement and method thereof  
A communication system includes a data sampling rate converter that uses a closed-loop control arrangement to convert an input signal at a first sampling rate to a second, asynchronous, sampling...
6032168 Computer system to perform a filter operation using a logarithm and inverse-logarithm converter and methods thereof  
In a parallel computer system having N parallel computing units a data pipeline connects all the computing units. In addition the computing units are coupled to a random access memory so that each...
6032166 Programmable analog bandpass filtering apparatus and method and design method for a discrete time filter  
A desired programmable complex analog bandpass filter is replaced by a "black box" that receives an analog continuous-time signal and delivers an analog continuous-time signal, just as the analog...
6023717 Method and apparatus for polyphase digital filtering in a mobile telephone  
A discrete polyphase digital filter is provided having only a single multiplier and a single cumulative adder for use in a mobile telephone. In one implementation, the filter is a discrete N-phase...
6023571 System for filtering events occurred within a predetermined period of time  
A system for filtering events which have occurred within a predetermined period of time includes a first generation unit for generating association rules between the events (parameters) which...
6021419 System for filtering broadcast digital information in accordance with channel identifiers stored in preference list which can be dynamically updated via command through network  
A filter adaptor connects a computer to a network through a network connection. The network has a large plurality of broadcast type messages having a given protocol. Each of the broadcast messages...
6018597 Method and apparatus for changing or mapping video or digital images from one image density to another  
A method and apparatus for resizing digital or stored images initially retrieves a one-dimensional sample of the image, such as a line of pixels. A final image size D is determined so that the...
6009446 Method and apparatus for digital filtration of signals  
Digital filtration is accomplished by splitting the incoming signal into phases. Each phase is then converted into a weighted sum reflecting the design of a prototype filter. Then the data is...
6009445 Reconfigurable infinite impulse response digital filter  
A reconfigurable infinite impulse response low-pass filter is described in which the frequency response can be changed by changing a single parameter while the filter gain of the filter remains...
6003051 Magnetic storage device and filter adjusting method applied to the same  
The cut-off frequency and boost value of an analog filter on a read channel is set to initial values When the data is read from a disk, the read data is subjected to PR equalization at an FIR...
5999956 Separation system for non-stationary sources  
A source separation system (10) processes input signals formed by mixtures of primary signals originating from sources and estimates the primary signals so that the estimates do not differ even in...
5995989 Method and apparatus for compression and filtering of data associated with spectrometry  
A method and apparatus for compression and filtering of data associated with spectrometry. The method and apparatus serves to recognize peak events and filter data associated with background...
5987484 Digital filtering system  
A digital filtering system is fed by input signal and produces an output signal from either a relatively low bandwidth filter or a relatively wide bandwidth filter selectively in accordance with...
5987487 Methods and apparatus for the processing of digital signals  
Methods and apparatus for the processing of digital signals having high speed and low power dissipation. The apparatus uses Residue Number Systems (RNSs) to represent the signals and/or...
5983253 Computer system for performing complex digital filters  
A method and apparatus for performing complex digital filters. According to one aspect of the invention, a computer system generally having a transmitting unit, a processor, and a storage device...
5983255 Digital filter and control system employing same  
In the control system disclosed herein, multiple input data streams are processed or filtered to generate multiple output streams by a filter which combines efficient batch processing of a fixed...
5983254 Zero-latency pipeline architecture for digital filters  
In a digital filter, data is received through an input path, and data in the filter is transported to an output through an output path. At least one delay element is disposed on the input path,...
5963273 Circuit for carrying out digital Nyquist filtering of IF intermediate frequency signals  
The circuit for the digital filtering of IF intermediate frequency video signals comprises an A/D (analog/digital) converter and a Nyquist filter (N); an analog prefilter, suitable for selecting...
5950151 Methods for implementing non-uniform filters  
Non-uniform filters are designed with a method which utilizes an orthogonal subbanding technique. A tiling representation of a signal is established. The signal is localized for both time and...
5949677 Control system utilizing fault detection  
A control architecture having improved fault detection and correction capabilities is disclosed. The system comprises primary and monitor control systems, each having an associated control signal....
5944775 Sum-of-products arithmetic unit  
A sum-of-products arithmetic unit includes a coefficient register, a data register, a multiplier, an adder, and a data bus used for the transfer of data to and from an external unit. Provision is...
5943642 Method of designing subband digital filter bank  
A method of designing a subband digital filter bank having first and second analysis filters with a 2-band linear phase satisfies a perfect reconstruction (PR) condition and has transfer functions...
5928311 Method and apparatus for constructing a digital filter  
A method and apparatus for constructing a digital filter from a set of data is described. The method comprises the following steps. A plurality of magnitude components of the set of data is...
5930745 Front-end architecture for a measurement instrument  
A front-end architecture is provided for a measurement instrument having a single path for the input signal for conversion into digital samples. A signal conditioner may be coupled via a pair of...
5926455 Recursive filters for polyphase structures  
Polyphase channelizing transmitters convert multiple signal channels into a single stream for transmission and corresponding polyphase channelizing receivers process the received stream to recover...
5926783 Switchable dividing network  
The switchable dividing network includes two individual filters whose center frequencies are selected from the group consisting of fa /8, 3fa /8, 5fa /8 and 7fa /8. The passband of its...
5920478 Multi-input multi-output generic non-interacting controller  
A multi-input multi-output (MIMO) controller is configured as a generic, non-interacting, multivariable controller with adaptive capabilities. The controller transforms the coupled multivariable...
5917734 Parallel decimator method and apparatus  
A decimation device has a sampler, a memory and an adder in the decimation stage. The sampler and the adder from a partial sample for storage in the memory at a sample time. At a next sample time...
5916301 Sample rate conversion for synchronous variable rate  
The concept of integer ratio sample rate conversion is extended to fractional values, where the exact ratio is expressed as M+N/D!/L with L being a constant. This methodology allows sample rate...
5917733 Pulse analysis using ordinal value filtering  
An image and pulse analysis system and method including a datasieve comprising a succession of ordinal filtering means receiving at least a selected part of a signal conglomerate and filtering the...
5912825 Gated base line restorer system  
A digital gated base line restorer system for an ionizing radiation spectroscopy device includes a gated base line restorer circuit, responsive to pulses passing through the device, for generating...
5910904 Digital filter apparatus  
A digital filter apparatus including a pair of infinite impulse response (IIR) digital filters connected in parallel for selectively controlling an output level of an input signal fed to the...
5909144 Digital method and apparatus for reducing EMI emissions in digitally-clocked systems  
A clock reference frequency is digitally derived from a base signal, then digitally modulated by ramping the clock reference frequency up and down about a desired frequency. The modulation occurs...
5903857 Method and apparatus for calibrating an analog filter in a sampled amplitude read channel  
A method and apparatus for calibrating an analog equalizer in a sampled amplitude read channel is disclosed wherein the filter's frequency response is measured and calibrated directly. This is...
5903480 Division-free phase-shift for digital-audio special effects  
An audio special-effect is created by a slow phase shift. A series of all-pass digital filters are used to shift the phase of an input stream of digital-audio samples. The amount of phase shift is...
5900006 Median filtering method and apparatus using a plurality of processing elements  
An apparatus for median filtering a sequence of input values comprises (N+1) number of processing elements coupled in series for storing (N+1) number of input values included in a values group and...
5896306 Group delay correction method and apparatus  
A filtering method and apparatus in which an input signal is subjected to an analog filtering step, then an analog to digital conversion step and finally a digital filtering step to produce a...
5886913 Method of synthesizing a finite impulse response digital filter and filter obtained by this method  
A method of synthesizing a finite impulse response digital filter includes a phase of calculating the impulse response g(t) of an analog filter the transfer function of which is defined by a...
5886912 Processing elements connected in cascade having a controllable bypass  
A plurality of processing elements are connected in cascade so as to constitute a single signal processing apparatus. The signal processing apparatus has a first path for transferring an input...
5873063 LSP speech synthesis device  
A speech synthesis application specific integrated circuit (ASIC) based on an Line Spectrum Pair (LSP) scheme. In the ASIC, the LSP parameter is encoded and two's complement fixed-point serial...
5867410 Time correction for digital filters in transient measurments  
Observation of transient phenomena in an oversampled regime is implemented with a time correction obtained by prepending one or more pseudo datums to the oversampled data to constitute an...
5867411 Kalman filter ionospheric delay estimator  
An estimator structure include a nonlinear modified Kalman filter for initial estimate and plurality of bias estimators and a parallel bank of Kalman filters for ambiguity resolution and providing...
5864493 Self-adapting interval mean value filter  
A sensing method and system for generating an output signal indicative of an estimated mean value of an input signal is provided. A sensor samples the input signal for N (N=2, 4, 8, 16, . . . )...
5862063 Enhanced wavetable processing technique on a vector processor having operand routing and slot selectable operations  
An apparatus and a method for massaging audio signal perform interpolation, dynamic filtering, and panning on the audio signal represented as a matrix of input values. In the interpolation...
5856934 Digital filter system  
Constants {Pb00i, Qb00j, . . . , Pak2i, Qak2j, Pci, Qcj, Pdi, and Qdj } for calculating each of filter coefficients {ak1, ak2, b00, bk1, bk2, c and d} for a digital filter 15 by using non-linear...
5841911 Method for the restoration of images disturbed by the atmosphere  
A method of real-time high resolution imaging through the atmosphere is presented. This technique is based on knowledge of average atmospheric Modulation Transfer Function (MTF) at the time the...
5842158 Method for adaptive filtering of well logging data  
The invention described herein provides for an intelligent or "adaptable" filtering method that could be applied when filtering log data. In the present invention, for a given filter model, the...
5841821 Bi-directional low pass filtering method and apparatus  
The present invention provides a bi-directional low pass filtering method and apparatus for attenuating out-of-baseband components of data transmitted from an encoder to a decoder over a...
5841681 Apparatus and method of filtering a signal utilizing recursion and decimation  
Digital filter bank device that operates in a frequency-time hierarchically arranged, recursively fed back scheme based on the concept of decimation of a multi-speed-rate-operated system. The...
5838598 Method and apparatus for gain correction of a sigma-delta converter  
Gain correction for a digital filter is accomplished by multiplying each data value by a coefficient representing the impulse response of the filter to form a convolution of the data values;...