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6453331 
Method and system for filtering force constant table for accurate torque modeling
A method and system of filtering an unfiltered servo torque table of a disc drive where a plurality of data points are added to the beginning and end of the unfiltered servo table and the table is... 

6430524 
Data processing method and apparatus
A data processing apparatus for processing input data and for outputting the processed data as output data achieves effective noise reduction. An inputreliability calculator calculates an input... 

6418548 
Method and apparatus for preprocessing for peripheral erroneous data
A method, apparatus, and article of manufacture for restoring a deteriorated signal to an undeteriorated signal. A deteriorated signal consists of a plurality of deteriorated and undeteriorated... 

6408022 
Equalizer for use in multicarrier modulation systems
The present invention provides an optimal procedure for determining in the time domain equalizer coefficients for an equalizer, where the equalizer compensates for the effects of the... 

6404357 
Digital/analogue communication system for increasing transfer efficiency of digital sample data
A digital/analogue communication system is described, where data is generated and received by a processing unit in a digital format and transmitted via a communication path in an analogue format.... 

6405228 
Selfadjusting optimal delay time filter
A circuit comprising a filter circuit and a delay circuit is disclosed. The filter circuit may be configured to present an output signal in response to (i) an input signal having one or more... 

6405227 
Digital crossover and parametric equalizer
A DSPbased and multichannel digital filter chip providing crossover filtering and parametric equalization. Crossovers can be lowpass, highpass, or bandpass filters with programmable cutoff... 

6384864 
Letterbox filtering circuit and method using the same
A letterbox filtering circuit and a method of using the same that includes a preprocessing filter circuit and a filtering circuit to reduce or correct the roundoff errors generated when... 

6377611 
Apparatus and method for a DSSS/CDMA receiver
An MMSE linear detector is implemented using a variable stepsize Griffiths' algorithm. The received signal is sampled and stored. The stored samples are multiplied with components of a spreading... 

6377967 
Efficient digital integration technique filter
An efficient digital integration technique (EDIT) filter uses a local oscillator pattern to provide the desired weighting for an input signal. A product waveform is determined by multiplying the... 

6373910 
Rapid acquisition dispersive channel receiver integrated circuit
An integrated circuit includes a reconfigurable FIR filter has an input port for receiving digital input signals and an output coupled to a coherent signal processor and a coherent memory. The FIR... 

6370191 
Efficient implementation of error approximation in blind equalization of data communications
A cable modem (20) having a blind equalizer (40) in its equalization function (28) is disclosed. The blind equalizer (40) includes an adaptive equalizer (44) and an approximating update function... 

6370248 
Synchronizing autonomous chaotic systems using filters
A system for synchronizing chaotic transmitters and receivers that is less sensitive to channel effects than other known chaotic communication methods. The system employs duplicate transmitter and... 

6370365 
Selective call radio having an integrated frequency conversion circuit
A selective call radio (300) includes receiver (200). The receiver in turn includes an antenna (202) for receiving a radio signal having a first operating frequency, an amplifier(204) coupled... 

6366872 
Data prediction in DSP methods for transient spectroscopies
Observation of transient phenomena in an oversampled regime is implemented with a digital filter precharged with a list of pseudodata obtained by prepending one or more pseudo datums to the... 

6360239 
Noiseshaped coefficient rounding for FIR filters
Improved methods and systems for generating quantized filter coefficients for a desired filter response are provided. One embodiment provides a technique that can be used to quantize the... 

6353644 
System and method for performing time domain equalization
Disclosed is a system and method for signal conditioning and equalization in the time domain, preferably in a discrete multitone (DMT) modem. The system preferably includes a processor operating... 

6343094 
Spread spectrum signal receiving method and apparatus for CDMA cellular communication
An improved filter for use in a CDMA receiver having an RF front end for splitting a received signal into I and Q components, A/D converters for converting the I and Q components into I and Q... 

6330579 
Fir filter based upon squaring
An improved FIR filter based upon squaring is used to selfdetermine a filter constant equal to the sumofsquares of the filter coefficients. An input signal is forced to zero for T samples,... 

6330228 
Method and device for measuring the proportion of an ATM cell stream satisfying a determined criterion
A process and device for measuring the proportion of ATM cells satisfying a criterion. The process includes allocating a first numerical value to the cells passing through a specified point of an... 

6304847 
Method of implementing an inverse modified discrete cosine transform (IMDCT) in a dialmode audio decoder
A method of implementing a dualmode audio decoder and filter is provided. The inverse modified discrete cosine transform (IMDCT) method and circuit for a dualmode audio decoder perform the IMDCT... 

6304679 
Method and apparatus for implementing twodimensional digital filters
A structure for implementing a plurality of twodimensional digital filters, such as finite impulse response filters, in an efficient manner. The structure includes a plurality of first stage... 

6298361 
Signal encoding and decoding system
In bandsplitting acoustic signals and subsequently encoding and decoding the bandsplit signals, bandsplitting and bandsynthesizing processing with high accuracy is desirable. To this end, an... 

6295322 
Processing apparatus for synthetically extending the bandwidth of a spatiallysampled video image
An input data stream of pixel values, representing an original video image having predetermined horizontal and vertical resolutions that has been spatially sampled at a first spatial sampling... 

6289443 
Selfpriming loop execution for loop prolog instruction
A method of operating a multiple execution unit microprocessor in a software pipelined loop is disclosed. This method executes the loop body before the pipeline is fully initialized, thus... 

6285971 
Method for realtime nonlinear system state estimation and control
A method for the estimation of the state variables of nonlinear systems with exogenous inputs is based on improved extended Kalman filtering (EKF) type techniques. The method uses a discretetime... 

6278753 
Method and apparatus of creating and implementing wavelet filters in a digital system
A method for generating a wavelet filter provides improved selectivity with minimal computational intensity in digital data systems (300,400). The process begins by generating an initial wavelet... 

6279019 
Decimation filtering apparatus and method
A decimation filtering apparatus using interpolated second order polynomials compensates for a droop caused by a CIC (Cascaded IntegratorComb) filter. The decimation filter includes a CIC... 

6275835 
Finite impulse response filter and method
A finite impulse response filter (90) has a data memory bank (92, 350) for storing data vectors and a coefficient memory bank (91, 300) for storing coefficient vectors. Filtering is done by... 

6269115 
Linearphase filter implementation using orthonormal laguerre expansions
A forward impulse response, linearphase matched filter, receiving as an input a sampled digital representation of an input signal, x(n), having n samples, and providing a filtered output, ya (n),... 

6260052 
Digital signal processing apparatus and method therefor
A digital communications signal processing apparatus applied to digital radar signal processing and a method therefor are provided. The digital signal processing apparatus in which windowing,... 

6249796 
Realtime technique for reducing the settling time of a high pass filter
A technique for resetting a HPF for improving its settling time in response to a sharp transition in its input signal, by rapid input and clocking through the highpass filter (HPF) of new data... 

6243729 
Digital finiteimpulseresponse (FIR) filter with a modified architecture based on high order RadixN numbering
A fast FIR filter 100, a system, and a method that increases the operating speed of a filter. The system uses a high order numbering system, in particular Radix8, and appropriate control lines,... 

6237016 
Method and apparatus for multiplying and accumulating data samples and complex coefficients
A method and apparatus for performing complex digital filters. According to one aspect of the invention, a method for performing a complex digital filter is described. The complex digital filter... 

6223193 
Macroblock variance estimator for MPEG2 video encoder
A hardware accelerator for a coding system for pictures includes an array of lines and columns of pixels, and calculates the variance of macroblocks of a digitized video image for a realtime... 

6208764 
Rank filter using a linkedlist to link elements in a memory array in numerical order
A rank filter suitable for use in realtime signal processing and image processing applications, for example, for improving an image. The rank filter can be implemented in software or hardware,... 

6202075 
Second order LMS tap update algorithm with high tracking capability
The system and method of the present invention, according to one embodiment, employs an adaptive finite impulse response filter having a second order Least Mean Square (LMS) architecture. The... 

6175848 
Variable 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... 

6167414 
System for adjusting size and scale of digital filters and creating digital filters
The invention provides a technique of scaling a digital filter and of adjusting the width of a digital filter. The technique involves truncating a filter, attenuating its new endpoints and then... 

6167415 
Recursive digital filter with reset
An integrated circuit, e.g. an Audio Codec (AC) '97 conforming audio codec, includes a digital filter and gain module including multiple channels of gain control and multiple channels of digital... 

6163789 
Digital parametric equalizer with symmetrical cut and boost spectrums
An improved digital parametric equalizer realized by software stored in a computer readable memory. The computer readable memory stores a first and a second set of instructions. The first set of... 

6154761 
Classified adaptive multiple processing system
An apparatus, method, and computerreadable medium for selectively performing, in parallel structures, different classified adaptive processes on an input image, sound data or other correlated... 

6141386 
Asymmetric filter combination for a digital transmission system
An asymmetric filter combination (F1, F2) for the transmission of a binary data stream (st) between a transmitter (T) and a receiver (R) is disclosed which includes a first filter (F1) at the... 

6128011 
Crossplatform digital signal processing designs using Java and C
A platformindependent softwareimplemented digital signal processing system in a computer system. The digital signal processing system is comprised of a digital signal processing unit implemented... 

6122404 
Visible stokes polarimetric imager
A visible Stokes polarimetric imager (80) that separately and contemporaneously measures each of the four separate Stokes polarization parameters of a visible light beam reflected from a scene.... 

6115726 
Signal processor with local signal behavior
A new signal processing method and a signal processing engine which can achieve extremely fast responsiveness to instantaneous changes in the behavior of the signal, and maintain the accuracy of... 

6094667 
Time spread root Nyquist filter
In a method is disclosed for transmitting and receiving a transmission data signal, after the transmission data signal is generated, it is modulated by a first time spread root Nyquist filter to... 

6081820 
Method and apparatus for filtering a signal using a window value
An apparatus and method for filtering and stabilizing a signal by using a window value is provided. The signal is sampled and each sample of the signal is input to the method or apparatus and... 

6073152 
Method and apparatus for filtering signals using a gamma delay line based estimation of power spectrum
A signal processing system for generating a signal component reduced output signal by estimating the power spectrum of a nonstationary signal component within a nonstationary input signal is... 

6061477 
Quality image warper
A digital image warper system produces a warped output image from an input image. The warper system increases the sampling rate of a sampled image above the Nyquist rate or samples an analog image... 