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WO/2012/150942A1 |
A method of frequency-domain filtering is provided that includes a plurality of filters, the plurality of filters including at least one constrained filter(s) W j =I, I and at least one unconstrained filter(s) W k =1,K- The method includ...
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WO/2012/142703A1 |
The invention provides a digital active EMI filter that removes, minimizes, or reduces unwanted interference (i.e., EMI noise) generated by a power circuit such as, for example, a power converter. Digital active filtering includes digita...
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WO/2012/139737A1 |
The invention relates to a filter apparatus (100) having a signal input (101) to which an input signal is applied which contains a useful component and a noise component, a fast signal path (102) and a slow signal path (103) arranged in ...
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WO/2012/131831A1 |
An A/D conversion unit (64) samples a first analog signal corresponding to the in-phase component at a first sampling rate to generate a first digital signal, as well as samples a second analog signal corresponding to the quadrature comp...
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WO/2012/123676A1 |
The present invention relates to a method and device (1) for filtering digital audio signals (x) using at least one ARMA filter (h1, h2), particularly during a filter change. The method according to the invention includes the following s...
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WO/2012/118483A1 |
A filter and method for filtering a signal are disclosed. The filter is equivalent to a plurality of bi-quad filters connected in series, and is implemented on a digital processor that receives a sequence of signal values at a sampling r...
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WO/2012/112706A1 |
One feature includes a method for implementing a fixed point recursive filter that reduces or eliminates steady state error. The method comprises obtaining a first filter state value, processing the first filter state value to remove a s...
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WO/2012/101382A2 |
The invention relates to a weighting filter to be used in a device for transmitting and/or receiving an analog signal, capable of transmitting and/or receiving said analog signal in a predetermined frequency band consisting of two adjace...
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WO/2012/102258A1 |
The objective of the present invention is operability at a higher speed. The present invention is provided with (FIG. 1): a weighted summing circuit (an adder (21) and coefficient multipliers (Tap 1a, Tap 2 to Tap n)) for adding an input...
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WO/2012/089140A1 |
The present invention provides a selection method and device for the pre-stored filter coefficient sets of a time-varying system, the selection method employing a two-time selection method, first selecting a set of filter coefficients to...
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WO/2012/086262A1 |
[Objective] To provide a digital filter circuit and a digital filter control method capable of reducing circuit scale and power consumption for filter processing in the frequency domain of the overlap FDE method. [Solution] The digital f...
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WO/2012/083464A1 |
An N-path filter with each path forming a different filter. A signal insertion block is provided at the start of the circuit and, in one embodiment, multiple memory capacitors are coupled to the signal insertion block. A bank of sequenti...
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WO/2012/079776A1 |
The present invention relates to an active band stop filter comprising a filter input and a filter output which are linked by a transmission line LT, a resonator RE coupled to the transmission line and connectable to a load impedance for...
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WO/2012/076689A1 |
The present document relates to the design of anti-aliasing and/or anti-imaging filters for resamplers using rational resampling factors. In particular, the present document relates to a method for designing such filters having a reduced...
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WO/2012/055974A1 |
There is described a method of making a linear periodically time varying system shift-invariant, comprising the following steps implemented for each input signal the sampling rate of which has to be converted: - generating a set of polyp...
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WO/2012/052807A1 |
Various techniques are generally described for digital signal processing (DSP) such as discrete time filters. In some examples, a Canonic Filter Module (CFM) can be used to configure the discrete time filter using an LSF-Model with a fin...
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WO/2012/050267A1 |
Disclosed herein is a digital re-sampling apparatus. The digital re-sampling apparatus includes a sample buffer, a sample buffer control unit, a filter bank, a first delay bank, a fractional delay constant table, a combiner bank, and a s...
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WO/2012/046033A1 |
A method of processing an input audio signal, the method comprising forming a plurality of output audio signals from the input audio signal, wherein each output audio signal is formed by performing respective processing on the input audi...
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WO/2012/039061A1 |
In the present invention, for an input signal with overlapping ringing, a ringing generation filter (12) generates a ringing approximation waveform from only the peak signal portion preceding ringing so as to decrease the ringing approxi...
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WO/2012/040029A1 |
A method and apparatus of mitigating multipath coupling interference in a wireless repeater system 10 includes measuring an error signal E(z) in a signal path 14, 15 of the repeater 10 which contains the desired communication signals 15,...
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WO/2012/039575A2 |
The present invention relates to a bandpass sampling receiver, comprising: an analog-digital converter which converts a wireless analog signal to a digital baseband signal; and a complex baseband signal extraction unit which generates a ...
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WO/2012/028897A1 |
The present invention relates to a rate change filter having multiple branches. The multi- branch rate change filter of the present invention achieves higher effective output rates by processing the input sample stream in two or more par...
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WO/2012/029613A1 |
In order to solve the problem of realizing high precision compensation of distortion, a digital filter device is provided with: a first distortion compensation filter unit for compensating for a first waveform distortion included in an i...
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WO/2012/026417A1 |
The invention provides a demultiplexing device in which the circuit scale can be reduced. The device comprises: a demultiplexing signal selector/distributor (130) for subjecting one or more reception signals to frequency conversion and d...
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WO/2012/018093A1 |
A sound processing unit (112) is provided with: an equalizer part (1121) which causes n biquadratic filters having individual characteristics to act sequentially on a sound signal; an estimating part (1124) which estimates the magnitude ...
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WO/2012/012963A1 |
A device and method for converting digital sampling rate is provided in the present invention. When a first sampling period is greater than a second sampling period, the multiple phase filter in the device is used to control a first swit...
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WO/2011/153263A1 |
A system, method, and apparatus is disclosed for interpolation of an output of an analog to digital converter (ADC) (402) to enable operation of the ADC (402) at a sampling rate that is independent of the sampling rate for a DSP core (40...
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WO/2011/123026A1 |
A method for linear filtering of noise in a sensorgram generated from a surface plasmon resonance apparatus, the method comprising: providing a linear filter of variable length to filter an output signal in the sensorgram; and determinin...
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WO/2011/106936A1 |
The invention relates to a filter device for filtering an input signal, the input signal comprising a clock signal having a clock frequency. The filter device comprises a filter (101) for filtering the input signal with a first set of fi...
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WO/2011/106651A2 |
Disclosed are methods and apparatus for sampling rate conversion in a wireless transceiver. The methods and apparatus achieve agile setting of sampling rates or resampling by adaptively setting a sampling rate of a signal based on at lea...
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WO/2011/105880A2 |
Disclosed is a digital filter having improved attenuation characteristics. The disclosed filter applies a sampling kernel which is scaled by a sampling constant to perform an upsampling process for a model filter response. The disclosed ...
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WO/2011/105879A2 |
A frequency reconfigurable digital filter and an equalizer using the same are disclosed. The digital filter includes a sampling kernel storage section configured to store a sampling kernel for performing upsampling of a model filter resp...
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WO/2011/100868A1 |
The invention relates to a filter device (200) for filtering an input signal (s(t)). The filter device (200) has a plurality of taps (210-216) having a respective filter coefficient (w0-w6) and a plurality of delay elements (221-226), wh...
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WO/2011/090110A1 |
Provided is a sampling rate conversion device for performing sampling frequency conversion, wherein the device is provided with a sampling phase detection unit (1) for obtaining a sampling phase for each operation reference clock using, ...
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WO/2011/089981A1 |
Provided with filter banks (2-0 to 2-(L-1)) that perform sampling frequency conversion on an input signal with a prescribed sampling frequency and generate a post-sampling frequency conversion signal as an output signal, and a control si...
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WO/2011/085947A1 |
Sampling rate converter for performing a rate conversion of an incoming stream of data, clocked at a first frequency, and output at a second frequency; said converter comprising: a circuit (2) for up-sampling the incoming data stream; a ...
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WO/2011/082482A1 |
A signal filter system which uses two groups of switches to couple tap current cells with integrating cells. The first group of switches couples tap current cells with at least one shared connection or bus while the other group of switch...
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WO/2011/069229A1 |
A virtual Weaver architecture filter is implemented using a sampling mixer that successively processes samples of the input signal in round-robin fashion and provides a sum of the samples as multiplied by coefficients emulating quadratur...
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WO/2011/065287A1 |
Disclosed is a demultiplexing device capable of reducing power consumption. The demultiplexing device is provided with frequency transformation receiving low-pass filter units (101 to 114) for performing frequency transform processing an...
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WO/2011/061830A1 |
A signal (DLS) generated by delay being given to a digital signal (FLS) by a delay unit (122) is transmitted to a clipping computing unit (124A). A clipping analysis unit (123A) uses the period of time secured by this delay to specify a ...
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WO/2011/027215A1 |
The invention relates to a method and an apparatus for processing an audio signal, wherein the method comprises the steps of : filtering an audio signal into at least three frequency band signals, generating for each frequency band signa...
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WO/2011/023299A1 |
The invention relates to a method for processing an analog measurement value signal and to a resolver assembly for carrying out the method, wherein the measurement value signal is supplied to a delta-sigma modulator, which on the output ...
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WO/2011/016769A1 |
A method for linear filtering of noise in a SPR sensorgram generated from a surface plasmon resonance apparatus is provided. The method includes providing a linear filter of variable length to filter an output signal in the sensorgram. T...
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WO/2011/004687A1 |
Provided are an audio-signal processing device; an audio device, audio-visual device, video displaying device, and information processing device provided with the audio signal processing device; audio signal processing method; program; a...
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WO/2010/149114A1 |
An apparatus for Intermediate Frequency (IF) filtering includes an IF filter. Said apparatus also includes a filtering coefficient storage and a coefficient selecting and controlling unit connected with the filtering coefficient storage,...
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WO/2010/129241A1 |
An ANR circuit, possibly of a personal ANR device, incorporates an signal processing topology to support the provision of feedback-based ANR, feedforward-based ANR and pass-through audio in which the topology incorporates a branch in whi...
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WO/2010/119963A1 |
Provided are a device and a method for sampling frequency rate conversion (SRC), which is capable of high-speed, high-precision data conversion. When a discrete impulse response function η(Pr,n) is extracted from an impulse response fun...
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WO/2010/120924A1 |
A complex analysis filterbank is implemented by obtaining an input audio signal as a plurality of N time-domain input samples. Pair-wise additions and subtractions of the time-domain input samples is performed to obtain a first and secon...
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WO/2010/117867A1 |
Forward and backward filters in cascade establish a specified phase shift in audio or video signals. The backward filter applies its filtering in a backward direction to impart a phase shift to its backward-filtered output that is a func...
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WO2010109551A1 |
Provided is a filter circuit using digital filters and a DAC. A filter circuit (1) is provided with digital filters (2) with two-filter parallel configuration, a DAC (3), and an LPF (5). In the DAC (3), decoders (7) with two-decoder pa...
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