Match Document Document Title
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 input-reliability 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 multi-carrier 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 Self-adjusting 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 DSP-based and multi-channel digital filter chip providing crossover filtering and parametric equalization. Crossovers can be low-pass, high-pass, or band-pass filters with programmable cutoff...
6384864 Letter-box filtering circuit and method using the same  
A letter-box filtering circuit and a method of using the same that includes a preprocessing filter circuit and a filtering circuit to reduce or correct the round-off errors generated when...
6377611 Apparatus and method for a DSSS/CDMA receiver  
An MMSE linear detector is implemented using a variable step-size 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 pre-charged with a list of pseudodata obtained by prepending one or more pseudo datums to the...
6360239 Noise-shaped 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 multi-tone (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 self-determine a filter constant equal to the sum-of-squares 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 dial-mode audio decoder  
A method of implementing a dual-mode audio decoder and filter is provided. The inverse modified discrete cosine transform (IMDCT) method and circuit for a dual-mode audio decoder perform the IMDCT...
6304679 Method and apparatus for implementing two-dimensional digital filters  
A structure for implementing a plurality of two-dimensional 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 band-splitting acoustic signals and subsequently encoding and decoding the band-split signals, band-splitting and band-synthesizing processing with high accuracy is desirable. To this end, an...
6295322 Processing apparatus for synthetically extending the bandwidth of a spatially-sampled 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 Self-priming 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 real-time 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 discrete-time...
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 Integrator-Comb) 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 Linear-phase filter implementation using orthonormal laguerre expansions  
A forward impulse response, linear-phase 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 Real-time 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 high-pass filter (HPF) of new data...
6243729 Digital finite-impulse-response (FIR) filter with a modified architecture based on high order Radix-N 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 Radix-8, 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 MPEG-2 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 real-time...
6208764 Rank 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,...
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 computer-readable 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 Cross-platform digital signal processing designs using Java and C  
A platform-independent software-implemented 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 non-stationary signal component within a non-stationary 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...