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JP4392995B2 |
Observation of transient phenomena in an oversampled regime is implemented with a digital filter pre-charged with a list of pseudodata obtained by prepending one or more pseudo datums to the oversampled data to constitute an effective da...
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JP4392904B2 |
The elementary transformation or reverse transformation unit is contained in a coding or decoding device, and is incorporated in a data processing apparatus. The elementary transformation unit comprises an advance (AV2), first and second...
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JP4392153B2 |
In a tap 1 in a shift register of a waveform equalizer, data of an input signal is stored in a data storing FF 111 . A tap coefficient computing unit 114 calculates a tap coefficient, which is stored in a tap coefficient storing FF 112 a...
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JP4388141B2 |
A digital filter has a filter cell for generating processed data. The digital filter cell includes plurality of coefficient registers which are arranged to circulate a plurality of coefficient values that correspond to a plurality of coe...
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JPWO2008018197A1 |
For example, in an IIR digital filter, a multi-input multiplier adder circuit is used as a component instead of a plurality of multipliers and a plurality of adders. As a result, since a plurality of multipliers and a plurality of adders...
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JP4384816B2 |
A modified fast convolution algorithm may be enhanced in order to increase the flexibility of the algorithm. In an exemplary embodiment of the present invention, a folding unit is introduced as a pre-processing stage prior to the Inverse...
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JP4387567B2 |
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JP4386079B2 |
In a sampling frequency conversion apparatus, an input sample register stores a predetermined number of input samples as an original sequence of input samples for an interpolative operation. A coefficient generating part prepares a first...
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JP4380174B2 |
A voice band correcting apparatus in which the signal level of limit bands is amplified by a correction filter, the signal level of a correction signal supplied is compared by a level detector to a preset level, and the result of decisio...
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JP4379976B2 |
A signal processor with a small circuit size, a simplified arrangement, and reduced cost and which can generate the same sound field as that in a case of listening to a reproduced sound using speakers to a location outside of a head of t...
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JP4381729B2 |
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JP2009282852A |
To perform calculation processing with required calculation accuracy without enlarging a DSP (Digital Signal Processor) and increasing power consumption and to shorten an calculation cycle.A decimal point alignment processing part 114 is...
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JP2009284451A |
To obtain an easy-to-design digital filter, having a linear passband and few ripples, and a small change in impulse response.A method of designing a filter is provided, in which data symmetric in a frequency axis direction is added to fr...
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JP4376973B2 |
A sample rate converter is described for converting an input data stream including a plurality of input samples at one sample rate to an output data stream including a plurality of output samples at another sample rate. The converter use...
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JP4376222B2 |
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JP4377573B2 |
In a programmable logic device having dedicated multiplier circuitry, some of the scan chain registers normally used for testing the device are located adjacent input registers of the multipliers. Those scan chain registers are ANDed wit...
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JP2009276841A |
To provide a method for setting the number of equations to be solved within the polynomial order of the number of ej(x).This distance calculation device is provided with: a recording part; a polynomial decision part;a first calculation p...
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JP4372694B2 |
To obtain a mixer that can simply acquire a baseband signal without being affected by noise and a jamming signal from a broadband signal, and has a charge subsampling circuit. A current generation circuit 8 outputs a current proportional...
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JP4372432B2 |
To provide a radio communication apparatus which has low power consumption and is miniaturized. The radio communication apparatus includes: a delay time variable filter 2 that has a tapped delay line from one end of which input data 1 ar...
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JP4372184B2 |
The sample rate converter includes a synthesizing unit which synthesizes an input signal sampled with frequency fs with a feedback signal of the frequency fs, in a frequency band from 0 to fs/N (where N indicates a natural number), with ...
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JP4373011B2 |
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to the use of the stand-alone or improved modified fast convolution al...
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JP4372232B2 |
In an audio processing arrangement ( 2 ) input signals from a plurality of input sources ( 4,6 ) are weighted by weighting factors x and y using weighting elements ( 10, 12 ). The weighted input signals are combined to a combined signal ...
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JP4364598B2 |
To suppress a total data size (a capacity) of filter coefficients used for an FIR filter processing even though a plurality of filter characteristics are to be realized when an FIR filter is used to secure high tone quality and to secure...
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JP4364599B2 |
To provide a filter such as an HPF and a BPF while preventing occurrence of tone quality deterioration and suppressing an increase in the processing load. A BPF processing section 3 is provided with a down-sample section 30a which realiz...
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JP4362262B2 |
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JP4356819B2 |
A filter device for changing a sample rate of a discrete representation, e.g., to change a size of an image signal (I), includes a plurality of multipliers (Mi), summing circuitry (Ai) coupled to outputs of the multipliers (Mi), and a pl...
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JP4348546B2 |
A signal processing apparatus includes the following elements. A plurality of signal processing software modules perform unit signal-processing steps of signal processing by means of software processing. An instruction input receiving un...
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JP4350336B2 |
A spectrum analyzer comprises a mixer, which mixes complex conjugate input signal v*(t) into a base band signal x(t) and a resolution filter, which filters the base band signal for narrow band. In accordance with two aspects of the inven...
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JP2009239653A |
To provide a sample rate converter in which a higher-order filter for removing folding noise can be configured in a small area.A sample rate converter includes: a selector to select either one of a first feedback signal and an input sign...
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JP4343529B2 |
A filtering method is proposed wherein first several filtering steps (I-III, IV-VI) are made. Each step (I-III,IV-VI) includes: generating a filtered signal (I,IV), rounding this filtered signal (II,V) to a certain accuracy and combining...
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JP2009232079A |
To provide a method of preventing an increase in circuit scale and computational complexity by solving the problem that, in n-fold oversampling, a larger number of taps of an LPF are required as n is increased, accordingly, the circuit s...
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JP2009229151A |
To provide a digital filter for pulse measurement for calculating appropriate parameters from an input signal before measuring the pulse of the input signal and improving filter characteristics by using the parameters.The digital filter ...
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JP2009232426A |
To provide a sample rate converter capable of suppressing increase in circuit area and power consumption with increase in the number of input signals.A sample rate converter includes: a multiplexer 10 which sequentially selects a plurali...
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JP4337964B2 |
An apparatus for signal processing discrete-time values for signal-sampling systems, such as digital/analog converters, switched capacitor filters, direct digital synthesizers, sample-and-hold circuits and the like, having means for prod...
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JP2009216733A |
To provide a device etc. for accurately estimating a voice enhancement filter.The filter estimation device includes: a target prediction coefficient code book A composed of model target prediction coefficients; a noise prediction coeffic...
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JP2009212795A |
To increase transmission efficiency by inhibiting an influence of group delay of a filter to be provided in order to pass through a working frequency band thereby making a frequency band near a passing frequency of the filter usable.An a...
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JP4328720B2 |
The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as...
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JP4326282B2 |
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JP4326031B2 |
In band-splitting acoustic signals and subsequently encoding and decoding the band-split signals, band-splitting and band-synthesizing processing with high accuracy is desirable. To this end, an optimizing processor (60) optimizes protot...
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JP4322053B2 |
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JP4321919B2 |
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JP4321625B2 |
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JP4316236B2 |
A method and device are described for generating two output signals (I; Q) each substantially identical to a square-wave input signal (A) from a local oscillator ( 2 ), wherein the first output signal (I) may have a certain time shift wi...
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JP4315764B2 |
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JP4315352B2 |
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JP4310594B2 |
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JP4310593B2 |
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JP2009177835A |
To provide a device for signal processing time discrete values that is capable of increasing the number of intermediate values in a signal processing system without changing the precision of the signal sampling systems or single sampling...
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JP4307987B2 |
A hardware-configurable digital filter is adaptable for providing multiple filtering modes. In one embodiment, the digital filter includes a register-based array of logic circuitry, computational circuitry and mode selection circuitry. B...
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JP4309381B2 |
The invention provides a spread spectrum communication system for maintaining an initial transmit power level of a communication station during periods of inactivity. The system comprises a first station (501) and a second station (502),...
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