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Electrical Computers: Arithmetic Processing And Calculating > Electrical Digital Calculating Computer > Particular Function Performed > Filtering FilteringFiltering patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.09/28/06 - 20060218215 - Echo prevention circuit having adaptive digital filter An echo prevention circuit comprises a first and second FIR filters into which a first input signal is input through an input terminal; an input/output terminal to which an output signal of the first FIR filter is output and the output signal reflected is input or a second input signal ... 09/28/06 - 20060218214 - Echo prevention circuit having signal subtracter feature An echo prevention circuit comprises an input terminal to which a first input signal is input; a first FIR filter into which the first input signal is input through the input terminal; a second FIR filter into which the first input signal is input at the same time as into ... 09/28/06 - 20060218213 - Optimization technique for fir and iir filter design A method for optimizing a digital filter that produces an output signal from samples of an input signal is configured with filter coefficients that are selected by a prescribed filter coefficient search. The filter coefficient search uses a pre-scaling constant or an additive constant with the filter coefficients and canonical ... 09/21/06 - 20060212503 - Multi-channel sample rate conversion method A sampling-rate conversion method receives N input channels which have been digitized at an input sampling rate, and converts the sampling rate of each input channel to produce N output channels at an output sampling rate. The method comprises computing a common FIR interpolating function which depends upon the input ... 09/21/06 - 20060212502 - Method and apparatus for implementing digital filters In one embodiment, the present invention discloses an apparatus and method for providing efficient implementations of Finite Impulse Response (FIR) digital filters. Specifically, a result from a FIR digital filter can be efficiently computed by using an AVG operation or instruction in conjunction with one or more other operations. The ... 09/21/06 - 20060212501 - Sinusoid selection in audio encoding A method of encoding (1) an audio signal (x(t)) by representing (12) at least part of the audio signal by a plurality of sinusoids, the method comprising the steps of performing an analysis on a first segment of said audio signal, selecting candidate sinusoids based on said analysis, determining for ... 08/31/06 - 20060195499 - Method for optimization of q-filter kernel parameters A Q-Filter is a reconfigurable technique that performs a continuum of linear and nonlinear filtering operations. It is modeled by unique mathematical structure, utilizing a function called the Q-Measure, defined using a set of adjustable kernel parameters to enable efficient hardware and software implementations of a variety of useful, new ... 08/31/06 - 20060195498 - Digital filter instruction and filter implementing the filter instruction A digital filter instruction and filter implementing the filter instruction are disclosed. The filter instruction synthesizes a digital filter and includes an instruction field, a tap length field, a coefficient address field, a data header address field, a clear accumulator bit and an update bit. The filter instruction a concise ... 08/17/06 - 20060184596 - Fir filter device for flexible up-and downsampling A FIR filter includes an input pipeline IP with a sequence of input delay cells DI; each for storing an input sample, and a plurality of N input tap points TP. An output pipeline includes a sequence of output delay cells DO; each for storing a sample, a plurality of ... 08/10/06 - 20060179095 - Sample rate converter The invention relates to an asynchronous sample rate converter (ASRC) for the conversion of the sample rate of digital data such as audio data or video data. In the case of high over-sampling or sub-sampling factors an ASRC becomes quite complex. It is an object of the invention to provide ... 08/03/06 - 20060173945 - Partial output finite impulse response filter Apparatus and methods are provided to implement an efficient partial output finite impulse response (FIR) filter. In one embodiment, the filter operates by first receiving a set of samples from a streaming data source via a communications medium. Next the set of samples are organized into a convolution matrix which ... 07/27/06 - 20060167963 - Method and device for controlling a reproduction unit using a multi-channel signal A method of controlling a sound field reproduction unit (2) having numerous reproduction elements (3n), uses a plurality of sound information input signals (SI) which are each associated with a general pre-determined reproduction direction which is defined in relation to a given point (5). The method includes: determining parameters which ... 07/13/06 - 20060155793 - Canonical signed digit (csd) coefficient multiplier with optimization An apparatus comprising an address generation circuit, a lookup table, a multiplexer and an output circuit. The address generation circuit may be configured to generate a series of addresses. The lookup table may be configured to generate one or more coefficients in response to the addresses. The multiplexer circuit may ... 07/06/06 - 20060149802 - Scaling filter and method thereof A scaling filter includes: two line buffers for buffering a plurality of pixel values corresponding to a plurality of source pixels, respectively; (N+1) multiplexers coupled to the line buffers for multiplexing the pixel values to output (N+1) intermediate values, respectively, wherein N is an integer; N bit shifters coupled to ... 06/15/06 - 20060129619 - Thinning filter and test apparatus There is provided a thinning filter including a first thinning section for down-sampling input data, a first filter section for filtering the data down-sampled by the first thinning section to output the filtered data, and a second thinning section for further down-sampling the data filtered by the first filter section, ... 05/25/06 - 20060112157 - Systolic de-multiplexed finite impulse response filter array architecture for linear and non-linear implementations Described is a finite impulse filter response (FIR) filter for use by signal processors. A demultiplexer receives input data samples at an input data rate. The FIR filter includes a plurality of computational units arranged in a systolic array of taps and phases. Each computational unit operates at an array ... 05/18/06 - 20060106906 - Digital filter system and method A method is disclosed for providing a digital filter system for providing a low pass filter function to a digital input. The method includes the steps of determining a finite impulse response of the input, determining a transfer function of the finite impulse response and providing a polynomial, identifying a ... 04/27/06 - 20060089959 - Periodic signal enhancement system A signal enhancement system improves the understandability of speech or other audio signals. The system reinforces selected parts of the signal, may attenuate selected parts of the signal, and may increase SNR. The system includes delay logic, a partitioned adaptive filter, and signal reinforcement logic. The partitioned adaptive filter may ... 04/27/06 - 20060089958 - Periodic signal enhancement system A signal enhancement system improves the understandability of speech or other audio signals. The system reinforces selected parts of the signal, may attenuate selected parts of the signal, and may increase SNR. The system includes delay logic, an adaptive filter, and signal reinforcement logic. The adaptive filter may track one ... 04/20/06 - 20060085496 - Programmably configurable digital filter A digital filter includes a plurality of connected component digital filters. Control signal generation circuitry is configured to receive a tap output signal from each of at least some of the component digital filters and to process the received tap output signals to generate a control signal to output from ... 03/09/06 - 20060053187 - Digital filter for transmission-end pulse shaping The digital filter has a finite impulse response, whose length corresponds at most to the duration of N input values, with the filter emitting an output signal which is n-times oversampled in comparison to the input signal (I, Q). In this case, a means (38.1-38.5) for storage of a plurality ... 03/09/06 - 20060053186 - Methods and systems for efficient filtering of digital signals A method in a signal processor for filtering samples in a digital signal is provided. An approximate filtered sample is generated as a function of eight samples of the digital signal. A correction is generated as a function of the eight samples, and a filtered sample is generated by modifying ... 03/09/06 - 20060053185 - Reflection filter A method and apparatus for generating a reflection filter. The method comprises the steps of determining an averaged step response of an acquired signal and generating a spectrum response from the averaged step response. A time at which a reflection in the averaged step response begins is determined and information ... 02/16/06 - 20060036664 - Efficient fir filter suitable for use with high order modulation radio frequency transmitters A linear filter includes an input node to receive an X-bit digital representation of a signal to be filtered; an output node to output a B-bit digital representation of a filtered output signal; an N-bit delay line having an input coupled to the input node and N outputs; and a ... 02/09/06 - 20060031275 - Digital if processing block having finite impulse response (fir) decimation stages A digital IF processing block including a decimation filter having FIR decimation stages provides improved performance over a Hogenauer decimating filter. The filter comprises multiple integrator stages followed by multiple FIR decimating stages. The zeros of the filter are tunable by adjusting the integer coefficients of the FIR stages providing ... 02/09/06 - 20060031274 - Parallel filter realization for wideband programmable digital radios A block polyphase filter is constructed of a set of filter blocks having different filter functions, and being arranged for parallel processing of portions of an input sequence of signals. Signals of the input sequence are divided among the blocks by a demultiplexer for processing at a clock frequency lower ... 01/26/06 - 20060020651 - Method and device for forming noise-filtered output values from input values encumbered with noise A method for noise filtering and a noise filter are for the filtering of override signals in a numerical control system. If an input value change condition is present, an accumulator is reset and an input value is set as the new output value of noise filter. If a noise ... 01/26/06 - 20060020650 - Ripple elimination filter A method for removing a step response ripple from a digital signal is accomplished by passing the digital signal through a low pass filter and a decimation filter forming a resultant signal, and filtering the resultant signal with a 4-tap Finite Impulse Response filter (FIR), wherein when half a sampling ... 01/12/06 - 20060010186 - System and method for design and implementation of integrated-circuit digital filters A system and method for implementing a digital filter, comprising computing on a digital computer a mathematical model of a digital filter; where the mathematical model has a predetermined first set of parameters. The first set of parameters is converted to a second set of parameters, where the second set ... 12/29/05 - 20050289206 - Digital filter design method and device, digital filter design program, digital filter A numerical string consisting of a ratio of “−1, m, −1” or “1, m, 1” is subjected to a predetermined moving average calculation n times. A numerical string thus obtained is used as filter coefficients of a basic filter and at least one basic filter is combined in an arbitrary ... 12/29/05 - 20050289205 - Methods and systems for efficient filtering of digital signals A method in a signal processor for filtering samples in a digital signal is provided. An approximate filtered sample is generated as a function of four samples of the digital signal. A correction is generated as a function of the four samples, and a filtered sample is generated by modifying ... 12/29/05 - 20050289204 - Parallel feedback processing Embodiments of a parallel feedback processor are disclosed. The parallel feedback processor includes a plurality of parallel coupled feedback filters. Each feedback filter includes a non-linear operator. At least one of feedback filter includes a plurality of sub-filters. Each sub-filter computes a one of possible non-linear operator filter outputs of ... 12/22/05 - 20050283510 - Digital filter using memory to emulate variable shift register A digital filter uses memory to emulate a variable shift register. Data samples are stored in a memory. The data samples are read from the memory, multiplied with corresponding coefficients stored in the same or a different memory, logically shifted, and written back into the memory so as to emulate ... 12/22/05 - 20050283509 - Micro-programmable filter engine A micro-programmable filter (MFE) engine includes multiple programmable filter elements and a microcode controller. The filter elements can be configured, controlled, and combined in different ways to implement different types of filters. The MFE preferably supports multiple-execution instructions that allow a single instruction to perform multiple moves into accumulators for ... 12/22/05 - 20050283508 - Micro-programmable digital filter A micro-programmable digital filter includes a plurality of programmable filter elements, an instruction memory for storing a control program, at least one instruction decoder for programming the filter elements based on the control program, and arithmetic logic for selectively scaling and accumulating output values received from the filter elements and ... 12/08/05 - 20050273482 - Digital filter and method thereof using frequency translations A digital filter and method of filtering frequency translate or shift a spectrum of a digital input signal and further filter a translated signal to reduce or attenuate frequency components in the spectrum of the input signal. The digital filter includes first and second translators and a first filter. The ... 11/24/05 - 20050262177 - Efficient real-time computation of fir filter coefficients Systems and methods for determining coefficients of an FIR filter are disclosed. The FIR filter coefficients are computed by determining a sine of an input value and an inverse of the input value. The sine of the input signal and the inverse of the input signal are multiplied together to ... 11/24/05 - 20050262176 - Polyphase filter with optimized silicon area A polyphase filter including M taps, each of the M taps including a filter coefficient. The filter also includes a multiplier-accumulator (MAC) shared by the M taps, a plurality of multiplexors for sequentially selecting a subset of the plurality of taps, and a scheduler for controlling the MAC to perform ... 11/10/05 - 20050251544 - Combined scaling, filtering, and scan conversion Techniques for performing combined scaling, filtering, and/or scan conversion are disclosed that reduce the amount of line buffer space required in the overall design of a video processing system. In particular, coefficients from all or a sub-set of the scaling, filtering (smoothing/sharpening), and scan conversion filters are combined into one ... 11/10/05 - 20050251543 - Method and device for suppressing the variation of a dc level of a signal reproduced from optical storing media The present invention provides a filtering device for high-pass filtering a signal reproduced from an optical data storage medium and a method for the same. More particularly, the present invention provides a device for suppressing the variation of DC level of a quad sum signal or a push-pull signal. The ... 11/10/05 - 20050251542 - Programmable engine core for executing digital signal processing functions A flexible engine for implementing digital signal processing (DSP) functions involving repeating various arithmetic/logical operations on a stream of data includes multiple programmable filter elements, at least one of which includes a microcode control program for internal control of the programmable filter element. The engine also includes programmable interconnection logic ... 10/20/05 - 20050235022 - Digital filter apparatus and filter processing method thereof A digital filter apparatus into which a digital input signal of plural bits is inputted in each predetermined period and which outputs a digital output signal that is a result of filter-processing the digital input signal in accordance with a predetermined filter coefficient and filter order. The digital filter apparatus ... 10/13/05 - 20050228839 - Method for analyzing energy consistency to process data A method for analyzing energy consistency to process data, for use with an electronic apparatus, includes the steps of analyzing energy consistency to process data, performing a data-buffering process for outputting a data frame, performing a data-processing process for outputting a shaping residual after inputting the data frame, performing an ... 10/06/05 - 20050223049 - Efficient multichannel filtering for cdma modems An efficient, multichannel filter for CDMA modems permits multiple serial, digital bit streams to be filtered by digital signal processing techniques including sample weighting and summing functions. Each individual channel may have custom weighting coefficients or weighting coefficients common for all channels. If the weighting coefficients are by adaption, the ... 09/22/05 - 20050210092 - Variable passband autoregressive moving average filter A variable passband ARMA filter has as inputs a signal to be filtered, a reverse version of the signal to be filtered and a variable coefficient to produce as an output a filtered signal. The variable coefficient is generated by a variable equivalent sample rate coefficient converter having as inputs ... 09/22/05 - 20050210091 - Up-sampling half-band reconstruction filtering An up-sampled half-band reconstruction filter has a seagull architecture in the form of a pair of parallel IIR filters, one receiving as an input an input signal delayed by one sample time and the other receiving as an input a reverse version of the input signal delayed by one sample ... 09/01/05 - 20050193047 - Method for synchronizing symbol timing A method of synchronizing symbol timing in a digital device includes the steps of receiving complex data samples of one or more symbols, correlating the data samples with a complex conjugate of a preamble data set, selecting between real and imaginary samples and generating a complex number based on the ... 09/01/05 - 20050193046 - Area efficient realization of coefficient architecture for bit-serial fir, iir filters and combinational/sequential logic structure with zero latency clock output An area-efficient realization of a coefficient block [A] or architecture [A] with hardware sharing techniques and optimizations applied to this block. The block [A] is connected to coefficient lines coming from block [E] and/or [F], to be connected to perform filtering operation or a mathematical computing operation with optimization in ... 08/18/05 - 20050182804 - Signal processing apparatus, non-integer divider, and fractional n-pll synthesizer using the same Signal processing apparatus or non-integer divider with a small circuit scale and a fractional N-PLL synthesizer comprising same. An adder 2 and a delay device 4 constitute a 20-bit input accumulator and its input is connected to a signal input terminal 1. Adder 8 and a delay device 10 constitute ... 08/18/05 - 20050182803 - Finite impulse response filter method and apparatus FIR filters are divided into partial filters that filter a same portion of image data to generate partial filtered results. The partial filtered results may be saved and later retrieved to generate complete filter outputs. ... 08/11/05 - 20050177606 - Method and system of representing a sound field The invention relates to a method of representing a sound field. The inventive method includes a step involving the acquisition of measurement signals (cn) which are delivered by acquisition means (1) comprising one or more simple sensors (2n) that are exposed to said sound field (P). The invention is characterised ... 07/21/05 - 20050160125 - Dynamic filter A system, an apparatus, and a method for dynamically filtering a signal. The system, apparatus, and method include providing a portion of a previously determined value and a portion of a currently determined value, the portions depending on a magnitude of change between those previously and currently determined values. ... 07/21/05 - 20050160124 - Filter enabling decimation of digital signals by a rational factor switching means (26, 28) for delivering at the output of the filter successively a first set of consecutive samples outputted by the first comb branch (16A) and a second set of consecutive samples outputted by the second comb branch (16B). Application to a software defined radio system. ... 07/14/05 - 20050154772 - Digital filter and digital broadcasting receiver having the same The present invention relates to a digital filter capable of computing a tap without output delay due to the filter operation in a symbol time, and a digital broadcasting receiver having the same. Particularly, filter output is obtained within a clock period, one multiplier and one adder are used to ... 07/07/05 - 20050149593 - Transitioning a filter function of a two-port lattice-form planar waveguide optical delay line circuit filter from a start filter function to a target filter function Optically coherent, two-port, serially cascaded-form optical delay line circuits can realize arbitrary signal processing functions identical to those of FIR digital filters with complex filter coefficients whilst maintaining a maximum optical transmission characteristic of 100%. The invention provides an iterative process for transitioning in a step-wise manner a filter function ... 07/07/05 - 20050149592 - Complex filter with higher order pole Pairs of second-order filters with feedback and cross coupling may be used to implement pairs of complex poles. The cross coupling may be frequency-dependent cross coupling or frequency-independent cross coupling. Frequency independent cross coupling may include coupling an internal node of a biquad filter. The pairs of second-order filters can ... 06/23/05 - 20050138096 - Non-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 fixed point number representation. A respective selected bit of all the ... 06/16/05 - 20050131974 - Method and apparatus for identifying similar events in long data records Method and apparatus for correlating data records acquired in a signal acquisition device includes the steps of extracting an area of interest from the data record displayed on said signal acquisition device, normalizing the area of interest, creating a filter based upon normalized values of the area of interest and ... 06/09/05 - 20050125473 - Signal filtering using orthogonal polynomials and removal of edge effects A method and device for filtering an input signal containing wanted signal components and unwanted signal components, wherein the signal is modeled as a set of polynomials. Polynomials from the set are identified to model the unwanted signal components. These unwanted signal components are removed from the input signal by ... 06/02/05 - 20050120067 - Digital filter designing method, digital filter designing program, digital filter According to a basic unit filter having a predetermined basic numeric string as a filter coefficient, a high-pass unit filter (H15) and a low-pass unit filter (L13) having pass bands having a common center frequency Fc are created. These are connected in the cascade way to design a band pass ... ### FreshPatents.com Support |