Document 
Document Title 
WO/2002/091588A1 
A subband adaptive differential pulse code modulation/encoding apparatus includes means (102, 103, 104, 105) having a predetermined asymmetric impulse response for receiving an audio signal and banddividing the received audio signal in...

WO/2002/091222A1 
A method, apparatus, and computer program product for combining a subband decomposition and a linear signal processing filter (LSPF). Operations performed include merging the LSPF, via superposition, with each synthesis filter of the fir...

WO/2002/091219A1 
A method, apparatus, and a computer program product for generating a set of jointly optimized linear signal processing filters and subband filters for processing digital data on a computer system are presented. In general, the invention ...

WO/2002/089334A1 
A filter system (10) and method are provided that is particular applicable to the resampling of a signal, such as a digital audio signal. The filtering method in accordance with the invention may use as a nearest neighbor strategy to red...

WO/2002/089116A1 
An inverse filtering method, comprising: generating a first filtered signal based on an input signal; and combining the first filtered signal with the input signal for obtaining a residual signal. The generating comprises: generating a s...

WO/2002/089061A2 
Embodiments of a twodimensional pyramid filter architecture are described.

WO/2002/086755A1 
The present invention is directed to a method of providing signal processing operations, including convolution/filtering, where each parallel stream is processing signals at a lower rate than the signal data rate itself while resulting i...

WO/2002/084234A1 
The apparatus is an asynchronous data logger (ADL) comprises a sensor (1) and, in a preferred embodiment, three sampling channels. Each channel comprises an analogue to digital (A/D) converter (3), a sampling clock (4), a memory (5) and ...

WO2002060261A3 
An electronic filter operates as a correlator that provides a discrete approximation of an analog signal (Figure 1, 10, 11, 12, 13). The analog to digital conversion is integrated directly approximation calculation. An array of sample an...

WO/2002/082106A1 
The invention concerns a device and a method for analysing a digital audio signal (C) for use for identifying musical notes present in a sound, audio or musical signal. The invention is characterised in that the method consists in: creat...

WO/2002/080362A1 
The present invention proposes a new method and apparatus for the improvement of digital filterbanks, by a complex extension of cosine modulated digital filterbanks. The invention employs complexexponential modulation of a lowpass prot...

WO/2002/080363A1 
Embodiments of a twodimensional pyramid filter architecture are described.

WO/2002/080098A2 
Embodiments of a pyramid are described.

WO/2002/078182A2 
This invention relates to an integrated circuit comprising a twodimensional pyramid filter architecture of order 2N1, where N is a positive integer greater than two. With this architecture reduction of computational complexity or proce...

WO/2002/078183A1 
A filter (201) accepts a diffusion code sequence or the like as an input sequence at the chip late 1/D. The diffusion code sequences accepted are successively delayed by a delay circuit (202) connected in series, and delivered. Delay tim...

WO/2002/076055A1 
An interface circuit (103) is integrated in an LSI. A comparator circuit (105) having a hysteresis characteristic compares the signal (111) outputted from a driver circuit (101) through a signal transmission line (102) with a signal (112...

WO2000054142A3 
The invention relates to a device for comparing data sequences. The device can be used especially for determining the channel impulse response in mobile radiotelephone systems by comparing a receive sequence (r(t)) with a pilot sequence ...

WO/2002/073615A1 
When data from an optical recording medium is demodulated, the data demodulation rate is variable in accordance with a reproduction state. Thus, it is possible to maintain a preferable read performance and reduce power consumption. As me...

WO/2002/071620A1 
While a digital input is oversampled up to eight times to process and the oversample data into a specified digital fundamental waveform with multipliers/adders (410) to carry out only folding operation with delay circuits 11¿1?11¿4...

WO/2002/071617A1 
A selftuning filter is disclosed. The selftuning filter includes a digital clocking signal and an input coupled to the digital clocking signal, whereby the input reads a value incident on the input when the digital clocking signal chan...

WO/2002/071256A1 
A method for finding optimal filter coefficients includes selecting a wavelet basis k parameters (102). The waveleet basis is reparameterized into k/2 rotation parameters (108) and factorized into a product of rotation and delay matrices...

WO/2002/069491A1 
A method for measuring system clock signal frequency variations is disclosed, whereby the number of search operations can be limited to 2log n, where n is the number of elements (signal values) within the sliding window used. A binary tr...

WO/2002/069492A2 
A highlyprogrammable Finite Impulse Response (FIR) digital filter overcomes the limitations of conventional configurations. Specifically, a compound FIR filter configuration is provided, offering the advantages of heightened programmabi...

WO/2002/067422A2 
An N dimensional signal processor using D scale nonuniform sampling is disclosed. The processor includes a multiresolution sampler (A) for outputting a stream of nonuniformly spaced samples resulting in an overall average sampling rat...

WO2002009582A3 
A method and apparatus for implementing a signal morphology preservation smoothing scheme. The smoothing scheme includes generating an output signal representative of a filtered version of the input signal, wherein the output signal is g...

WO/2002/063764A1 
A digital FIR filter is provided that inputs a series of data samples x[0]x[n] and generates a partial sum output PS[i] where i$m(F)n. The partial sum output is a weighted version of the difference between a partial sum of the previous i...

WO/2002/060261A2 
An electronic filter operates as a correlator that provides a discrete approximation of an analog signal (Figure 1, 10, 11, 12, 13). The analog to digital conversion is integrated directly approximation calculation. An array of sample an...

WO/2002/060056A2 
The present invention comprises a method of obtaining coefficients for a transmit filter such that the power spectral density of the output for the different frequencies comes close to but does not exceed a maximum power spectral density...

WO/2002/060114A2 
A multi−carrier filter for a wireless communications system employing a multi−carrier signal. The multi−carrier filter includes a first mechanism for receiving the multi−carrier signal and extracting carrier signal components A s...

WO2002037675A8 
The invention relates to a filtering method and a filter implementing the filtering method. In the solution, a signal is filtered by at least one real FIR filter (22) having at least one stop frequency pair whose different frequencies ar...

WO/2002/058244A1 
Data to be compressed is differentiated for respective sampling points (S1S20) and their absolute values are sequentially added to obtain differential total data (D1D20). Then sampling points, where when data between two sampling point...

WO2002039727A3 
The invention relates to a method and apparatus for detecting asymmetry in transient signals and to a method and apparatus for correcting such asymmetry. In the apparatus for detecting asymmetry there is provided a preshoot filter (1) f...

WO/2002/056468A2 
The present invention is directed to efficient and accurate filtering and interpolation techniques. Methods of the present invention reduce the number of required operations and reduce computational errors in the filtering and interpolat...

WO/2002/054350A2 
A multiplierless pyramid filter is described comprising a sequence of scalable cascaded units, each of said units comprising a delay unit and three the adders, said delay unit the adders being coupled to produce a higher order pyramidall...

WO1999009648A3 
An audio processing system is used to process digital audio signals that represent sound emanating from a source that is moving through three dimensional space. The audio processing system has a filter unit that employs infinite impulse ...

WO/2002/051083A1 
An IQ modulator and method for modulating a signal in accordance with I and Q symbols using derivative FIR's operating at the symbol rate and programmable multiaccumulators for waveform generator.This provides advantages that reduced co...

WO/2002/051003A2 
A method and device are described for generating two output signals (I; Q) each substantially identical to a squarewave input signal (A) from a local oscillator (2), wherein the first output signal (I) may have a certain time shift with...

WO/2002/048904A1 
An FIR decimation filter includes the a shift register (51) having M flipflops arranged in M/R rows (52, 54, 56, 58) of R bits. Each row has a left tap and a right tap. The rows are grouped into upper half and lower half sections. The s...

WO/2002/047262A2 
A filtering method is proposed wherein first several filtering steps (IIII,IVVI) are made. Each step (IIII,IVVI) includes: generating a filtered signal (I,IV), rounding this filtered signal (II,V) to a certain accuracy and combining ...

WO/2002/047296A1 
An analog filter comprises first and second arithmetic operation sections (2¿1?, 2¿2?) connected in series and each composed of processing circuits connetected in series. Each processing circuit includes an S/H circuit of plural stag...

WO/2002/047258A2 
A filter (26) is used to average power values of a signal that has been subjected to varying gain. The gain is factorised into two factors, the first being the highest power of 2 within the gain, and the second being a factor which can b...

WO2001089086A8 
Modeling a target spectrum (S) is provided by determining (21) filter parameters (pi,qi) of a filter which has a frequency response approximating the target spectrum (S), wherein the target spectrum is split in at least a first part and ...

WO2001084707A3 
A apparatus for computing coefficient values for configuring a digital filter for compensating for nonlinearity of an RF/IF device. The apparatus includes a reference signal generator, connected to an input of the RF/IF device, for gene...

WO/2002/041490A2 
A system for digital filtering includes a set of logic gates, a state storage, and a multiplexer. The state storage includes two or more storage banks and may also include combinatorial logic and/or at least one lookup table. In one appl...

WO/2002/039727A2 
The invention relates to a method and apparatus for detecting asymmetry in transient signals and to a method and apparatus for correcting such asymmetry. In the apparatus for detecting asymmetry there is provided a preshoot filter (1) f...

WO/2002/037675A1 
The invention relates to a filtering method and a filter implementing the filtering method. In the solution, a signal is filtered by at least one real FIR filter (22) having at least one stop frequency pair whose different frequencies ar...

WO/2002/031977A1 
The invention concerns a finite impulse response filtering device having a transfer function comprising P coefficients, designated c¿q?, wherein P$m(G)1 is a predetermined integer. The invention is characterised in that in such a device...

WO2001084734A3 
A matched filter requiring no highspeed processor and which consumes less power is disclosed. Partial filters 301  30N obtained by dividing number of matched filter taps by N are provided with a controller 341 for controlling which par...

WO/2002/025476A1 
An analog FIR filter (500) that processes multiple output samples in parallel is disclosed. The simultaneous parallel processing of multiple samples permits improved sampling rate and improved accuracy as compared to prior art filters.

WO/2002/023721A1 
A digital low pass filter of the FIR type stores the input signal into register means with a plurality of taps. These taps are connected to address a look up table and the filtered output signal is derived from the output of the look up ...
