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Matches 201 - 250 out of 13,158

Document Document Title
WO/2013/169450A1
In some embodiments, a multistage filter whose biquad filter stages are combined with latency between the stages, a system (e.g., an audio encoder or decoder) including such a filter, and methods for multistage biquad filtering. In typic...  
WO/2013/128783A1
A Fourier transform unit (111) subjects the digital signal of a time axis to a Fourier transform, and generates a frequency domain signal which is the signal of the frequency axis. A filter unit (113) uses a number (N) of first coefficie...  
WO/2013/124443A1
An arrangement of overlapping filter banks comprises a synthesis stage and an analysis stage. The synthesis stage receives a first signal segmented into time blocks and outputs, based thereon, an intermediate signal to be received by the...  
WO/2013/125173A1
The present invention reduces the circuit size and power consumption required to apply a digital filter in the frequency domain. This digital filter circuit is provided with the following: a complex-conjugate generation unit that generat...  
WO/2013/098342A3
The frequency response of a digital filter, such as a pre-emphasis filter in a signal transmitter having a phase-locked loop, is adjusted using interpolation of the filter coefficients, enabling sets of filter coefficients to be pre-comp...  
WO/2012/146714A3
The invention, which relates to an arrangement and a method for producing an output voltage, is based on the object of specifying an arrangement and a method which is used to produce a voltage reference that is precise, stable and has wi...  
WO/2013/110173A1
A digital infinite impulse response filter has a plurality of cascaded filter elements, with each filter element defining a pole of the filter and wherein the poles lie inside a unit circle. The filter elements are configured such that t...  
WO/2013/106370A1
A multi-rate filter system is disclosed. More particularly, a computationally efficient multi-rate filter system for processing an audio stream on a consumer electronics device is disclosed. The multi-rate filter system includes a plural...  
WO/2013/103562A1
A system includes a polyphase multirate filter and a controller which, responsive to detecting a data stream: measures a current phase relationship between a current resampling filter input clock signal and a current multirate output clo...  
WO/2013/098342A2
The frequency response of a digital filter, such as a pre-emphasis filter in a signal transmitter having a phase-locked loop, is adjusted using interpolation of the filter coefficients, enabling sets of filter coefficients to be pre-comp...  
WO/2013/094308A1
A digital filter circuit of the present invention is provided with the following: a fast Fourier transform (FFT) circuit (13) for converting a time-domain complex-number signal into a frequency-domain signal; an I/Q separation circuit (1...  
WO/2013/092140A1
A system is presented for sample rate conversion of an input stream of digital data among a plurality of input streams sampled at a different input. The system (1) comprises - storage means (3) for storing input samples of the input stre...  
WO/2013/085450A1
A heterodyne receiver structure comprises a frequency conversion block arranged to convert an incoming analogue radio frequency (RF) signal to an analogue intermediate frequency (IF) signal; a filter block arranged to filter said analogu...  
WO/2013/060463A1
An asynchronous sample rate converter and method for converting an input signal to a resampled output signal is disclosed. An efficient and cost-effective sample rate converter for converting an input signal of arbitrary sample rate to a...  
WO/2012/168926A3
Highly efficient digital domain sub-band based receivers and transmitters.  
WO/2013/054484A1
The present invention provides an audio signal output device and an audio signal output method, whereby favorable high-frequency signal interpolation can be achieved. The audio signal output device and the audio signal output method usin...  
WO/2013/050494A1
An apparatus and method for creation of reordered vectors from sequential input data for block based decimation, filtering, interpolation and matrix transposition using a memory circuit for a Single Instruction, Multiple Data (SIMD) Digi...  
WO/2013/049858A1
A new and more efficient filtering system (e.g., digital microphone decimation filter architecture system) is described. A key to this architecture is the use of two parallel filter paths. Each path operates at the output sample rate, an...  
WO/2013/033837A1
An RF circuit having a transcoupler, a multifunctional RF-circuit element that can operate both as an impedance inverter and as a signal coupler. When connected to a fixed load impedance, the transcoupler can also operate as an impedance...  
WO/2013/033836A1
A transmitter that uses a digital pre-distortion (DPD) circuit to mitigate the effects of nonlinearity of a multistage or multi-branch power amplifier. The DPD circuit relies on two or more feedback signals received from an RF-output cir...  
WO/2013/031083A1
This symmetric filter operation device (10) is provided with: a first data shuffling unit (161) that reads a first data string from a register file (140) and extracts a left-side data string from the first data string, said first data st...  
WO/2012/139737A4
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 ...  
WO/2012/168926A2
Highly efficient digital domain sub-band based receivers and transmitters.  
WO/2012/163133A1
A finite impulse response (FIR) digital filter and an implementation method therefor. The filter comprises an extraction module (101), an impulse response module (104-107), and a processing module (110). The extraction module (101) is co...  
WO/2012/163281A1
Disclosed is an L order N times digital extracting filter, including a plurality of alternately cascaded accumulator groups and 2 times extractors, wherein L, N and M are natural numbers, N = 2M, an output signal of the 2 times extractor...  
WO/2012/163121A1
Provided in the present invention are a method and device for digital filtering. The method comprises: performing an edge extraction on an input signal requiring an FIR filtering to acquire a step signal; reading unit step responses from...  
WO/2012/157427A1
A digital filter circuit whereby a filtering process for a plurality of channels having different sampling rates is performed with a reduced circuit size, comprises delay circuits divided into a first to mth delay device groups, a proces...  
WO/2012/153221A1
A spectrum agile radio having one or more variable digital filters is described. To quickly, yet accurately, retune the digital filter(s) a windowing function is applied to an ideal filter characteristic for each of one or more desired f...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
WO/2012/039575A3
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 ...  
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...  
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...  
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...  
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...  
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...  
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,...  
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 ...  

Matches 201 - 250 out of 13,158