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6778111 Multi-dimensional deglitch filter for high speed digital signals  
A system and method provide deglitch filtering. The system has a voltage-based deglitching filter and timing-based deglitching filter. The voltage-based deglitching filter connects with the...
6775684 Digital matched filter  
A digital matched filter has a serial-to-parallel conversion circuit that converts input data fed thereto in serial form into n sets of parallel data and a plurality of delay circuits that each...
6768607 Adaptive dual-frequency notch filter  
A disk drive comprises an actuator servo control system including at least one disk, an actuator structure comprising at least transducer head for writing and/or reading data from the disk and...
6763323 Resolution filter for a spectrum analyzer  
A spectrum analyzer comprises a mixer, which mixes complex conjugate input signal v*(t) into a base band signal x(t) and a resolution filter, which filters the base band signal for narrow band. In...
6760740 Method of calculating line spectral frequencies  
In a method of encoding a source signal by determining Line Spectral Frequencies (LSFs) for representing Linear Predictive Coding (LPC) filter coefficients, real zeros are determined in associated...
6760372 Adaptive signal processor using an eye-diagram metric  
The invention is embodied in an adaptive filtering system for processing a received signal, including a signal processor having plural states to generate a processed signal from the received...
6757343 Discrete wavelet transform system architecture design using filterbank factorization  
Techniques to overlap states for efficient multilevel wavelet decompositions to reduce memory and delay in discrete wavelet transform in a block-by-block fashion. The input data is segmented into...
6757569 Filtering process for stable and accurate estimation  
A filtering process is adapted for eliminating the need of prediscretizing a continuous-time differential model into a discrete-time difference model. It provides a universal robust solution to...
6754805 Method and apparatus for configurable multi-cell digital signal processing employing global parallel configuration  
An improved mechanism for performing different types of digital signal processing functions, including correlation, sorting, and filtering operations. The mechanism includes a plurality of...
6751277 Filtering device  
The invention relates, in the field of subband decomposition, to the design of filter banks adapted to the input signal statistics. In most cases, two channel filter banks are iteratively applied...
6751640 Method and apparatus for multiply-accumulate two-dimensional separable symmetric filtering  
An architecture for a multiply and accumulate two-dimensional separable symmetric filter. The architecture includes a binary tree adder producing sums of samples of an incoming signal. A...
6744835 Methods and apparatus for implementing an interpolation finite impulse response (FIR) filter for use in timing recovery  
A finite impulse response (FIR) filter employing hybrid coefficients for use in analog-to-digital and digital-to-analog conversion. Clock jitter introduced by the transmission medium may be...
6738734 Empirical mode decomposition apparatus, method and article of manufacture for analyzing biological signals and performing curve fitting  
A computer implemented physical signal analysis method includes four basic steps and the associated presentation techniques of the results. The first step is a computer implemented Empirical Mode...
6721770 Recursive state estimation by matrix factorization  
A filter is disclosed for recursive state estimation of a process by matrix factorization. The filter preferably takes the general form of P=XY, where P is a matrix of previous state and/or...
6711598 Method and system for design and implementation of fixed-point filters for control and signal processing  
A method and system is disclosed for design and implementation of fixed-point filters from floating-point filters. A design sequence for designing a fixed-point filter for a system is selected. A...
6680644 Digital interpolation window filter for phase-locked loop operation with randomly jittered reference clock  
A system and method for filtering a jittered clock is disclosed. The filter of the present invention may check if a reference clock is received at a point in time within a pre-defined window of...
6680476 Summed time-of-flight mass spectrometry utilizing thresholding to reduce noise  
A summed TOFMS having a filter for identifying detector outputs that are likely the result of noise rather than ions striking the ion detector. The TOFMS stores a plurality of data values at...
6668087 Filter arithmetic device  
A filter operation apparatus according to the present invention involves a vertical and horizontal half-pixel motion compensation and vertical and horizontal intra-loop filtering means 100...
6668013 Digital filter  
A digital filter of the present invention is an FIR type digital filter arranged such that an input data converting circuit samples input data at a rate N times as fast as a sampling frequency fs,...
6658440 Multi channel filtering device and method  
A filter comprising of an internal memory for storing data and coefficients; an address generation unit, for generating memory addresses; a multiply and accumulate unit (i.e.—MAC unit), for...
6643674 Digital filtering method and device and sound image localizing device  
A series of digital data to be filtered is divided into a plurality of frames, and f samples of the digital data of each of the frames are burst-transmitted via a computer bus. In transferring the...
6643323 Digital filtering method  
A method of implementing a digital filter utilizes a fast and accurate reciprocal estimate function to generate and recharacterize the digital filter on the fly. The reciprocal estimate function...
6639948 Fractional delay digital filter  
A device is presented for processing digital signals conveyed between a common port and many particular ports. The device includes a linear processing module. The module includes filters, which...
6633894 Signal processing arrangement including variable length adaptive filter and method therefor  
A signal processor includes an adaptive filter that generates an output signal as a function of an input signal and of weighting coefficients stored in a memory. An error detector generates an...
6631273 Method and apparatus for filter selection from a frequency synthesizer data  
Modern portable communications units, and in particular cellular telephones, can contain several frequency bands for receiving and several frequency bands for transmitting signals. Typically these...
6625628 Method and apparatus for digital filter  
A digital filter having a small amount of hardware is realized by constructing a cosine roll-off filter. In the filter the first and fifth multipliers and the second to fourth multipliers are...
6622117 EM algorithm for convolutive independent component analysis (CICA)  
In connection with blind source separation, proposed herein, inter alia, are: expectation-maximization equations to iteratively estimate unmixing filters and source density parameters in the...
6622118 System and method for comparing signals  
A method and system that include a first measurement signal and a second measurement signal that can be input to first and second filters. The filters can be subject to a first constraint to...
6611854 System and method for distorting a signal  
The present invention employs a mapping function in order to apply a known distortion to an input signal. The mapping function of the present invention is defined by:...
6606641 System for varying the dynamic range of coefficients in a digital filter  
A digital filter includes a plurality of filter cells, each of which includes circuitry to determine a coefficient for the filter cell, to adjust the coefficient in accordance with a gain that is...
6603812 Hardware implementation of a decimating finite impulse response filter  
The invention provides apparatus and methods for generating the coefficients of a finite impulse response digital filter used in signal sample rate conversion. Sequence generation circuitry...
6600495 Image interpolation and decimation using a continuously variable delay filter and combined with a polyphase filter  
A filter structure is provided that facilitates the use of the filter as either a continuous delay Farrow filter or a selectable delay polyphase filter. The less complex polyphase filter is used...
6597746 System and method for peak to average power ratio reduction  
A system and method for performing peak-to-average power ratio reduction in a transmitter using pulse amplitude modulation (PAM) encoding. Broadly, a transmitter is configured to perform active...
6591282 Apparatus and method for a DC-Insensitive FIR filter for optical PRML channel  
A Finite Impulse Response filter (FIR) reduces the effect of baseline wandering of the input signal on convergence. The FIR includes an adder, a DC-Insensitive error calculator, a DC-Insensitive...
6581080 Digital filters  
A technique for generating coefficients for a digital filter. A gain control signal with a value of reference gain and a frequency control signal with a value of reference frequency are provided....
6574647 Filter arrangement  
The invention relates to a filter arrangement for separating analog or digital baseband signals, for example, POTS or ISDN signals and digital wideband signals, which are simultaneously...
6553396 Filter bank constituting method and filter bank apparatus  
A method and apparatus for constructing a filter bank designed to split the frequency spectrum of digital signals into plural bands. Specifically, a low-pass analysis filter unit (H0(z)), adapted...
6542914 Method and apparatus for increasing bandwidth in sampled systems  
Systems that sample a continuous analog time-domain signal. The invention is particularly applicable to systems whose analog components have a bandwidth limit below that desired or specified. The...
6542539 Multiported register file for coefficient use in filters  
Multiported register files for use in storing coefficients in adaptive FIR filters. incorporate computational ability, e.g., the ability to perform computation on coefficient values or derivatives...
6529925 Method for reducing the crest factor of a signal  
A method for reducing the crest factor of a signal, the signal being represented by a digital signal vector whose elements are sampled values of the signal. The method includes the steps of...
6526429 Method for designing all pass digital filters  
A method for designing an all pass filter, in accordance with the present invention, includes providing a plurality of signals having a group delay, and normalizing the group delay to determine a...
6523051 Digital signal transformation device and method  
A digital signal transformation method, in which the original samples (x2i; y12i) of the digital signal are transformed into output samples (y12i, x2i). Any output sample being calculated by a...
6519496 Feedback controller, digital filter device, and storage device  
An apparatus has an input hold circuit for sequentially holding digital feedback signals sequentially transmitted at a sampling period, and for sequentially outputting the transmitted feedback...
6510354 Universal robust filtering process  
A universal robust filtering process is adapted for eliminating the need of prediscretizing a continuous-time differential model into a discrete-time difference model. It provides a universal...
6507859 Signal processing method  
A signal processing method enabling reproduction of a broadband signal free of aliasing which transforms a plurality of discrete signals obtained by sampling an identical continuous signal using...
6496845 Low pass filter  
A low pass filter is capable of prevention of increasing of circuit scale there of according to increasing of tap number. The low pass filter initiates counting operation in response to a data...
6480534 Apparatus and method for a reduced component equalizer circuit  
In an equalizer filter unit, the filter is divided into a plurality of sequential segments. While all the components of the equalizer unit multiply data signal groups by the a coefficient signal...
6466957 Reduced computation system for wavelet transforms  
An improved architecture for efficiently calculating a discrete wavelet transform is presented. The present system appreciates the associated redundancies of calculations and proposes a topology...
6466633 Methods and apparatus for implementing a receiver filter with logarithmic coefficient multiplication  
A method of filtering a signal, the method including the steps of sampling analog input signal, thereby providing a purality of digital complex input signal samples the each of the samples...
6463450 Method and apparatus for the location of the peak of a function using a filter bank  
A method and apparatus for determining the location of the peak of a signal using an adaptive filter bank. The method includes the steps of providing a set of calculated output points for the...