Document 
Document Title 
WO/2001/045269A1 
An oversampling circuit and a digital/analog converter which have small circuit scales and the component costs of which are reduced. Data inputted at predetermined intervals is multiplied by four multiplicators by means of a multiplier (...

WO/2001/045253A2 
The aim of the invention is the offset compensation of a digital signal (r), especially a communications signal that is transmitted in a cordless digital communications system. According to the invention, a recursive digital filter is us...

WO/2001/045267A1 
An oversampling circuit and a digital/analog converter which have small circuit scales and the component costs of which are reduced. The oversampling circuit comprises four D flipflops (101 to 104), four multipliers (121 to 124), th...

WO/2001/043285A2 
The present invention is directed to a reconfigurable finite impulse response (FIR) filter that processes data tap values with canonical sign digit (CSD) coefficients. The FIR filter according to the present invention includes a shift gr...

WO/2001/042798A1 
A filterbank comprises a plurality of multipliers (M¿o?...M¿M1?) connected to receive respective samples (x(n)...x(nM+1) of an input signal and operable to multiply the samples by respective coefficients (c¿0?(k)...c¿M1?(k)) to pr...

WO/2001/041320A1 
An oversampled filter bank structure that can be implemented using popular and efficient fast filter banks to allow subband processing of an input signal with substantially reduced aliasing between subbands. Even subbands (SB0, SB2, SB4,...

WO/2001/039032A1 
A method and system is disclosed for design an implementation of fixedpoint filters from floatingpoint filters. A design sequence (120) for designing a fixedpoint filter for a system is selected. A loworder floatingpoint filter (130...

WO/2001/038943A1 
A feedback control system for 1bit digital signal processing comprises different operation means (23) for calculating the difference between the input from an external device (22) and the measured variable measured by sensing means (25)...

WO2000074438A3 
A digital hearing aid uses a digital filter using coefficient multipliers and with digital signal processing algorithms, which can be implemented with a minimum amount of dedicated circuitry, which may be contained in an integrated circu...

WO/2001/035525A1 
A parallel digital matched filter is constructed which performs numerous simultaneous correlations of a received spread spectrum signal against various replica offsets of its spreading sequence. This allows for the rapid acquisition (12)...

WO/2001/033712A1 
There is disclosed a digital filter cell capable of processing in a first mode a first signal having real data components only and processing in a second mode a second signal having real data components and imaginary data components. The...

WO/2001/033730A1 
An echo compensation device for a duplex transmission system comprises an echo compensator (10), for creating a digital echo compensation signal (yec), based upon a digital transmitted signal (y), which is combined with a digital receive...

WO/2001/031783A1 
A Finite Impulse Response (FIR) filter circuit (60) includes delay elements (63, 64, 66), multipliers (71, 72, 73, 74), a summing device (78), and a digital integrator (69) at the output of the FIR filter circuit (60). A method for proce...

WO/2001/028091A1 
Receiver systems often use filter combinations of resampling filters and matched filters to decimate the input signal and to adapt it to the pulse form of the sender signal. Due to the independent functions these two filters fulfil, they...

WO/2001/028120A1 
A mobile station is provided for receiving a spread spectrum, code division transmission from at least one transmitter, such as a base station. The mobile station contains a receiver for outputting data samples, and further contains a mu...

WO/2001/028092A1 
The present invention relates to an interpolation method and an interpolation apparatus for a digital audio signal or a digital image signal that has a predetermined sampling cycle and quantization bit length, and in particular, to an in...

WO/2001/028118A1 
The invention relates to a matched filter (610) for implementing the correlation of an input signal (621) and a reference signal (627). The matched filter (610) according to the invention comprises N parallel Msample long shift regi...

WO/2001/025731A2 
The present invention relates to a method for weighing items and in particular to a method of filtering signals representing the weight of an item. The invention is applicable in all measuring instruments which indicate an average value ...

WO/2001/026316A1 
Serial signals generated by A/D conversion at a rate twice the modulation rate are so subjected to S/P conversion that the data ratio is 1:2 to generate a pair of data signals parallel in modulation rate. For demodulation, the parallel p...

WO/2001/026224A1 
A spread spectrum modulated signal generator is disclosed that reduces the storage requirement for storing values representing filter responses of input signal samples in a digital filter by taking advantage of timereversal symmetry of ...

WO/2001/022582A1 
A circuit arrangement and method utilize a programmable shifter (48, 88) coupled downstream of a multiplier (36, 86) to shift the product of an input value and a prescaled filter coefficient that implements a predetermined filter functi...

WO/2001/019304A1 
A cochlear implant comprising a storage buffer in which sampling values derived from a sound signal are saved. The storage buffer is connected to a multichannel waveform generator, in which data for a stimulation strategy are saved. Read...

WO/2001/018960A1 
A digital convolution apparatus, includes means (12) for determining a realvalued discretefrequency representation of a desired digital filter and means (14) for transforming said discretefrequency representation into a corresponding ...

WO/2001/018961A1 
A digital filter design apparatus for noise suppression by spectral subtraction includes a first spectrum estimator (12) for determining a high frequencyresolution noisy speech power spectral density estimate from a noisy speech signal ...

WO/2001/017108A1 
The invention relates to a filter unit, comprising a decimator (2), core filter (1) and an interpolator (3). According to the invention, the sampling rate is decreased by a fractional sampling rate modification factor L/M, prior to the c...

WO/2001/016620A1 
The invention is an automatic polezero adjustment circuit for an ionizing radiation spectroscopy system in which an amplitude histogram circuit (56) is used to obtain an amplitude histogram of an acquired spectrum. The shape of a select...

WO/2001/016934A1 
In a digital audio signal processing apparatus for karaoke systems, echo cancellation and like applications, a digital delay line (10) is connected to receive an input audio signal (DRY) and has a plurality of outputs, each at a respecti...

WO/2001/015320A1 
A transversal filter for suppression of interfering signals in broadband communication systems is described. The filter has only one variable filter coefficient, A = f(a), while the coefficient in the last path always is equal to 1. a = ...

WO/2001/013515A1 
A digital filter is provided for high quality playback of a recorded audio signal. The filter is designed in the frequency domain by establishing a base point and a series of principal points at uniform frequency intervals. The principal...

WO/2001/009760A1 
Disclosed herein are a method, apparatus and computer usable medium for linear filtering with filters of any desired shape and length using the wavelet transform as the computation engine by modifying the basis functions. Specifically, t...

WO/2001/010024A1 
Disclosed is a circuit for converting chronologically discrete scanning rate signals which are fed to a scanning rate signal converter, which, after application of an approximation procedure, is used to convert feed input signals to outp...

WO/2001/008313A1 
A low pass digital filter (180) using cascade polyphase recursive digital signal processing circuit. The filter in the receive direction may contain a resampling Hogenauer filter (220) followed by an equalizer filter (230) to correct fo...

WO/2001/008306A1 
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 over several levels of decomposition, the...

WO/2001/006671A1 
The invention concerns a method for synchronising mobile telephone receivers in a mobile telephone system, which consists in using a first synchronising channel having a first frequency and via which a known code for all the mobile telep...

WO/2001/005032A1 
In a wireless telecommunications system, data processing delays associated with digital channelization and dechannelization may be reduced through the use of a technique that involves processing data blocks in conjunction with the trans...

WO/2001/003295A1 
The invention relates to a novel FIR filter for an AD converter according to a method contained in patent application DE 4333908. Said method is based on non equidistant signal scanning and requires a special digital FIR decimation filte...

WO/2001/003294A1 
A technique for correlating a sequence of signal sample values with a predetermined digital code to produce correlation values for shifts in the sequence of signal sample values relative to the predetermined digital code is disclosed. Th...

WO/2001/003293A1 
A technique for correlating a stream of signal sample values with a predetermined binary code having a plurality of binary code bits is disclosed. The technique is realized by forming precombinations of groups of the signal sample values...

WO/2001/001570A1 
The invention relates to a programmable digital bandpass filter for a codec circuit to adapt the filtering properties of the codec circuit to a transmitted PCM signal. Said filter comprises at least one programmable digital highpass filt...

WO/2000/079686A1 
A digitalanalog converting device and method for lowering the computational complexity and decreasing the circuit scale, and data interpolating device and method. The digitalanalog converting device has a fundamental digital waveform g...

WO/2000/074438A2 
A digital hearing aid uses a digital filter using coefficient multipliers and with digital signal processing algorithms, which can be implemented with a minimum amount of dedicated circuitry, which may be contained in an integrated circu...

WO/2000/068826A1 
An interpolation circuit capable of performing interpolation operation with a simple constitution. A 16times oversampling from discrete data is performed by D flipflops (4, 5). A first convolution operation is performed by D flipflops...

WO/2000/067375A1 
The invention relates to a comb filter system comprising an Nthorder integrator (10) on the input side, whose output signal is fed to at least three signal paths (20, 30, 40). Each signal path (20, 30, 40) is provided with a control dev...

WO/2000/065713A2 
Sample rate converters are known, and are used to convert a signal with a first sample rate (sampling frequency) into a signal with a second sample rate (sampling frequency). To obtain a flexible sample rate converter with sampling frequ...

WO/2000/064049A1 
The dually adjustable electromechanical handling means according to the invention has controlled circuit (30), a microcomputer (15) controlling the controlled circuit (30) and a displacement/digital signal transducer (12) with movable el...

WO/2000/062421A1 
A digital filter and a multiplication method are described, which lead to an efficient architecture for a hardware implementation of digital FIR and IIR filters into FPGAs. The multiplications of input sample data and delayed sample data...

WO/2000/060738A1 
A matched filter computes complex correlations between a sequence of complex input values and a complex code. The matched filter includes a set of N changeover switches (55) having a first input connected to receive real parts (Sr) of th...

WO/2000/060739A1 
A decimation filter includes a zero insertion filter (12) having an input and an output, wherein the input forms an input of the decimation filter; a cascade of four comb filters having a first accumulator stage (141) and a second stage...

WO/2000/059111A1 
Converters are used to convert a digital signal into an analogue signal or vice versa. In audio reproduction systems oversampled converters are used in combination with a digital upsampling low pass filter followed by either an analogue ...

WO2000039952A8 
A digital data system (100) provides 1D, 2D and 3D capability and multiband channel capability. Improved filter banks are created by generating a filter bank having an analysis portion and synthesis portion and obtaining wavelet coef...
