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JP2010122191A |
To provide a magnetic measuring device having a plurality of magnetic sensors in which circuit size of its (delta-sigma) type ADC (Analog-to-Digital conversion apparatus) can be adjusted.A modulator 22 in this device is delta-sigma modul...
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JP4473660B2 |
There is provided a thinning filter including a first thinning section for down-sampling input data, a first filter section for filtering the data down-sampled by the first thinning section to output the filtered data, and a second thinn...
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JP4472792B2 |
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JP4473709B2 |
To estimate an input signal with accuracy only from an observation signal without knowing the degree of a transfer function. The transfer function between each sensor and a signal source from output signals X1(n), X2(n) of sensors 13, 14...
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JP4474476B2 |
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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JP4472868B2 |
A vehicle computer system has an audio entertainment system implemented in a logic unit and audio digital signal processor (DSP) independent from the host CPU. The audio entertainment system employs a set of ping/pong buffers and direct ...
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JP4469090B2 |
An analog-to-digital converter responsive to an analog signal converts the analog signal to a digital signal. A digital decimation filter, having an associated frequency response, is responsive to the digital signal for producing a decim...
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JP4469515B2 |
A digital filter is provided in which, when switching the time constant, a stable operation can be ensured without generating noise at the switching timing. In the digital filter for applying a filter operation to an input signal and...
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JP4468428B2 |
The method involves inserting a first set of digital data transmitted from a first source (1) at a first rate, into a digital signal transmitted from a second source (3) at a second rate. The second rate is higher than the first rate. Ea...
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JPWO2008090896A1 |
Provided is an acoustic adjustment method capable of easily adjusting the sound quality according to the taste of the listener and various uses. The acoustic adjustment method of the present invention is an acoustic adjustment method in ...
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JPWO2008090897A1 |
Provided is a filter capable of adjusting the sound quality according to various uses. The filter (1) according to the present invention is configured to input an audio signal and output the audio signal with a predetermined angle of pha...
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JPWO2008090899A1 |
Provided is an acoustic adjustment device capable of easily adjusting the sound quality according to the taste of the listener and various uses. The acoustic adjustment device of the present invention performs a filtering process accordi...
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JP4464651B2 |
A loop interference canceller that carries out an adaptive operation of responding to time variations of the phase or level of loop interference wave or key station wave at high speed and with high accuracy and reduces the size of an app...
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JP4464380B2 |
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JP4461928B2 |
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JP4461770B2 |
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JP4457484B2 |
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JP4459696B2 |
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JP2010093821A |
To optimize a decimation filter.An initial decimation filter is applied to an original frame to generate a decimated filter. An optimized prediction filter is extracted from both the decimated frame and the original frame, while the init...
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JP4453326B2 |
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JP4451693B2 |
A method, computer program product and data processing apparatus for filtering data, in particular for use in deblocking filters. The method comprising applying a plurality of m filter coefficients which each have a value which is a nega...
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JP4449007B2 |
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JP4446072B2 |
The present invention relates to an audio signal output device for outputting based on a digital audio signal. A judging unit judges the frequency of reversals in polarity of the digital audio signal. A selecting unit switches an output ...
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JP4445132B2 |
Digital filtering is performed by receiving an L-bit block of 1-bit data samples, wherein L is greater than 1, and using the L-bit block of 1-bit data samples to select a corresponding one of 2L filter output values. Selection may be acc...
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JP4445041B2 |
A digital signal processor that is used for echo cancellation computations is disclosed, which includes parallel multiplier/adders, an input signal sample memory, and a plurality of accumulators for temporarily storing the results of the...
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JP4445248B2 |
To provide a digital frequency converter that maintains a high power efficiency in an EER scheme despite the partial inclusion of digital signal processing in processing of the EER scheme. An inputted modulated signal is converted into p...
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JP4443118B2 |
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 at ...
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JP4442199B2 |
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JP4443533B2 |
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JP2010068416A |
To solve such a problem that a sampling frequency conversion cannot be performed in a period when a ratio of an input sampling frequency to an output sampling frequency is obtained for sampling frequency conversion by switching signals h...
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JP4440473B2 |
A multichannel polyphase filter (304, 602) includes a processing system (204, 506) for accepting and processing M input channels of data, each sampled at an input sampling rate, wherein M is a positive integer greater than unity. The pro...
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JP4437993B2 |
To provide, for example, a sound processor for achieving a low-pass filter, or the like by simple calculation. An input receiver 202 of the sound processor 201 receives the input of displacement in an input waveform successively; an outp...
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JP4434707B2 |
In the digital signal processing apparatus, the first digital filter reproduces that part of an impulse response which responds fast, and the decimation filter converts the output of the delay device of the first digital filter to a digi...
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JP2010056978A |
To reduce a chip footprint of a semiconductor integrated circuit adaptable to a multi-mode.A reception analog front end unit 10 converts first and second RF reception signals in first and second communication schemes into first and secon...
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JP2010056688A |
To provide a method and program for processing a synchronous operation of a digital signal, which reduce error without changing a given sample frequency even if the synchronous period, i.e. the ratio of the analog input signal frequency ...
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JP2010050875A |
To appropriately add frequency characteristics corresponding to a user instruction to an input audio signal without deteriorating amplitude characteristics and phase characteristics.Frequency characteristic information in response to an ...
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JP2010507309A |
A digital signal processor for interpolating a gain (coefficient) to be applied to a digital signal, the processor including: first memory means for storing a target gain coefficient; second memory means for storing a current gain coeffi...
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JP2010041311A |
To provide an FIR filter capable of obtaining predetermined characteristics with a small number of input taps, delay circuits, and multipliers and achieving an improved response and low cost.In a lowpass filter, a bandpass filter, and a ...
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JP4418543B2 |
In an equalizer filter unit (13), the filter (13) is divided into a plurality of sequential segment (30). While all the components of the equalizer unit (13) multiply data signal groups by a coefficient signal group, in only one segment ...
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JP4416210B2 |
The invention concerns a digital signal transformation method, original samples (x2i ; y<1>2i) of the digital signal being transformed into output samples (y<1>2i, x2i), any output sample being calculated by a function of original sample...
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JP4416244B2 |
A pitch shifter capable of shifting an acoustic signal in pitch to an arbitrary level with a high degree of accuracy without any change in reproduction time, and also sufficiently reducing high-frequency distortion without being increase...
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JP2010504699A |
A method for generating a synthesized waveform from a desired arbitrary waveform via a convolution processor includes: providing a data stream input signal to the convolution processor including an extended duration impulse signal; compu...
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JP4413413B2 |
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JP4413664B2 |
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JP2010028756A |
To provide an apparatus and method for designing an FIR (finite impulse response) filter capable of calculating filter coefficients of an FIR filter that copes with data structure of a unique user-defined type, without having to carry ou...
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JP4406631B2 |
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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JP2010021860A |
To provide a band separation filter, such as a narrow-band FIR filter that has a small number of input taps, delay circuits and multipliers, is able to surely obtain the desired characteristics, and excels in frequency separability, and ...
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JP2010011493A |
To reduce memory capacity for storing tap coefficients in a digital filter, including a plurality of multipliers for multiplying the tap coefficients, respectively, and an adder for adding multiplied outputs.This digital filter includes:...
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JP4396233B2 |
Provided is a complex exponential modulation filter bank which can reduce quantity of arithmetic operation, and can realize low electric power consumption or speeding-up. This complex exponential modulation filter bank has a step of calc...
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JP4397488B2 |
It is object to provide an oversampling circuit and a digital to analog converter capable of realizing a smaller circuit and reducing a cost of parts. The oversampling circuit comprises four D flip-flops 10-1 through 10-4, four multiplie...
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