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JP4690243B2 |
To solve the problem that, in a conventional noise reduction system, noise is emphasized for noise (periodic noise) including line spectrum components, while noise including continuous spectrum components is reduced very well. In a perio...
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JP2011103662A |
To provide a filter apparatus and a method for filtering a time domain input signal, and a filter generator and a method for generating an intermediate filter definition signal.The filter apparatus comprises a complex analysis filter ban...
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JP4688266B2 |
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JP4683283B2 |
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JP2011083018A |
To reduce a processing request amount of an overall convolution system with the overall quality of a convolution process substantially maintained.The present invention relates to a method of processing a series of input audio signals rep...
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JPWO2009072197A1 |
Regardless of the distribution pattern of the tap coefficient amplitude of the digital filter, a digital filter or the like that keeps the maximum value of LUT data low and achieves a wide distortion compensation range and a reduction in...
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JP4672791B2 |
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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JP4668750B2 |
A data reproduction circuit for receiving data and reproducing the data and its clock which comprises a clock generation circuit (182) for generating a clock for over-sampling the data, an over-sampling determination circuit (181) for sa...
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JP4667791B2 |
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JP4668410B2 |
An audio processing system is used to process digital audio signals that represent sound emanating from a source that is moving through three dimensional space. The audio processing system has a filter unit that employs infinite impulse ...
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JP4665099B2 |
In a method for determining filter coefficients of a digital filter, particularly in UMTS, the predetermined filter coefficients bv are divided by a same scaling factor s and then quantized in that counted from the most significant bit o...
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JP4662190B2 |
A device and a method for image processing make it possible to significantly improve the contrast and the sharpness of the whole image, in comparison with the ordinary. By amplifying the portions other than the edges, while conserving th...
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JP4662737B2 |
An address generator is supplied with a designated gain GT, and generates exponent data n and an address of mantissa A. The address of mantissa A is set based on an accuracy of the designated gain GT. A mantissa-coefficient acquiring uni...
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JP2011060369A |
To provide a filter coefficient control apparatus for adaptively determining a filter coefficient of a digital filter.The filter coefficient control apparatus adaptively calculates and outputs the filter coefficient of the digital filter...
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JP4657541B2 |
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JP4649859B2 |
A signal processing apparatus and method is disclosed by which signal components of different musical intervals of an audio signal can be obtained with a small amount of arithmetic operation. A re-sampling section re-samples an audio sig...
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JP4651311B2 |
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JP4652546B2 |
A receiver has a low spurious level and a high frequency precision without increasing power consumption of a local oscillator. The receiver comprises first and second local oscillators; a phase locked loop operating based on an output of...
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JP4650130B2 |
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JP2011048632A |
To provide an image process device, an imaging device, a noise removing method and a program that can suppress erroneous determination on impulsive noise and reduce the generation of a false color while keeping a removal effect of the im...
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JP4647679B2 |
An audio processing system is used to process digital audio signals that represent sound emanating from a source that is moving through three dimensional space. The audio processing system has a filter unit that employs infinite impulse ...
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JP4645216B2 |
To propose a technique capable of providing a processing effect to only a particular high frequency component regardless of a simple processing method. A high frequency adjustment component of an input digital signal is adaptively reprod...
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JP2011044798A |
To obtain an effect equivalent to one to be obtained when a tap coefficient is extended without extending the bit width of the tap coefficient settable in a multiplier in a digital filter.A target tap coefficient made to be a numeric val...
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JP4643939B2 |
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JP4638695B2 |
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JP4632929B2 |
To provide a demodulating device for realizing reduction in filter circuit size and low power consumption. The demodulating device includes a mixer unit 2 for demodulating an in-phase signal and an orthogonal signal from a quadrature-mod...
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JP4630056B2 |
There is provided a convolution operation circuit that performs a convolution operation on a provided digital signal. The convolution operation circuit includes a data dividing section that generates a plurality of divided data obtained ...
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JP2011023927A |
To perform a digital filter operation with high accuracy without increasing a hardware scale.The digital filter performs, when a filter coefficient multiplied to a signal to be processed of an IIR filter operation or a filter coefficient...
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JP2011023982A |
To provide an amplitude limiting circuit that limits any digital signal to a desired amplitude, even if a sampling rate is converted at a following stage, and to provide a digital processing apparatus with the circuit.The amplitude limit...
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JP4623933B2 |
A method and system of accurately processing a discrete time input signal, p(n), having a first clock rate into a discrete time output signal having a second clock rate, comprising the steps of delta filtering the input signal to produce...
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JP2011504023A |
Methods and devices for forming a series of samples of a filtered version of an input signal. Multiple tap current cells each generate a tap current from the signal. Multiple distribution means couple the tap current cells with multiple ...
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JP4619827B2 |
A distortion compensation apparatus in a mobile radio transmitter using multiple carriers within a given transmission bandwidth. The apparatus includes a distortion compensation processing circuit (91) multiplying an input signal (BBS) b...
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JP4620319B2 |
A two-stage filter for a circuit protection device. The filter includes a first filtering device connected to receive an input signal v, the first filtering device generating an intermediate signal v1, whereinwhere k is a sample index an...
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JP4619784B2 |
The invention relates to a data processing system for performing a polyphase filtering. This circuit comprises functional units (304, 305, 306) able to perform polyphase filterings, and a memory device (301, 302, 308) for storing data an...
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JP4621245B2 |
A signal processing system includes a receiving terminal configured to receive a digital signal comprising a plurality of samples associated with a plurality of original sampling times, wherein the original sampling times have a period o...
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JP4620043B2 |
Systems and methods for providing protection from failure events in a digital audio amplification system. One embodiment of the invention comprises a system having a digital amplifier controller, an amplifier output stage (160) coupled t...
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JP4617668B2 |
To provide an audio signal processing apparatus which well switches processing with less noise because difference in a propagation delay time never occurs between filters to be switched, and because the phase of a waveform is not deviate...
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JP4617298B2 |
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JP2011010035A |
To reduce the number of multipliers used in a down-sampling filter which performs the down-sampling of 1/N times with respect to data.Each time series value selection means 1, B selects one time series value from among N-pieces of time s...
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JP4610147B2 |
In a wireless telecommunications system, data processing delays associated with digital channelization and de-channelization may be reduced through the use of a technique that involves processing data blocks in conjunction with the trans...
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JP2011004264A |
To obtain suitable filter processing results by eliminating discontinuous points in the end of a frame of IFFT output.A digital signal processing apparatus 1 generates from a sample stream of a time domain a plurality of frames overlappe...
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JP2010288211A |
To obtain a method for designing a digital filter whose phase characteristic has an extreme value.In the digital filter which obtains output digital data by a predetermined filter calculation process to input digital data, the method for...
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JP4602375B2 |
A synthesizer for generating a decorrelation signal using an input signal is operative on a plurality of subband signals, wherein a subband signal includes a sequence of at least two subband samples, the sequence of the subband samples r...
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JP4603618B2 |
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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JP4598587B2 |
Each of a first oversampling filter and a second oversampling filter oversamples to an nxm times as high frequency as a symbol rate. The first and second oversampling filters then output output data having a sampling frequency to first a...
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JP4597965B2 |
A digital filter configuration for the filtration of a digital video signal, wherein the functions of a zoom filter, in the form of a low-pass filter, which is a polyphase filter, and of at least one peaking filter, in the form of a high...
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JP4595166B2 |
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JP4593743B2 |
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JP4595165B2 |
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JP4593788B2 |
A low power programmable digital filter (10) adapted for use with a telecommunications system transceiver. The digital filter (10) includes a first finite impulse response filter section for receiving an input signal and having a first t...
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