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7366747 |
Digital filter circuit and data processing method
A digital filter circuit is capable of processing multi-channel data having different sampling frequencies. RAMs (random access memories) are provided which store data inputted thereto...
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7362816 |
Inversion of channel distortion by adaptive wavelet lifting
A method for inverting telecommunication channel distortion by adaptive wavelet lifting. The distortion signal is analyzed using wavelet lifting and the inverse filter is computed. Coefficients of...
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7352911 |
Method for bilateral filtering of digital images
A method for processing an image using a bilateral filter. The bilateral filter is reformulated at each pixel location in the image into a sum of the original signal value of a central pixel at...
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7346638 |
Filtering, equalization, and power estimation for enabling higher speed signal transmission
A power spectrum estimator consistent with certain embodiments has a pulse extraction circuit that compares a digital input signal with a delayed version of the digital input signal to produce an...
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7346137 |
Nonuniform oversampled filter banks for audio signal processing
A non-uniform filter bank is created by joining sections of oversampled uniform filter bands that are based on complex exponential modulation (as opposed to cosine modulation). Each filter bank...
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7340019 |
Programmable filter
Briefly, in accordance with one embodiment of the invention, a programmable filter may implement an infinite impulse response filter so that a transceiver in which the filter is utilized may be...
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7333034 |
Data processing device, encoding device, encoding method, decoding device decoding method, and program
The present invention relates to a data processing apparatus, a method and apparatus for encoding, a method and apparatus for decoding, and a program, that allow a reduction in an algorithm delay....
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7319797 |
Adaptive filters and apparatus, methods, and systems for image processing
An adaptive filter according to one embodiment includes an N×N two-dimensional convolution, where N is an odd integer greater than one. Pixels of an image are filtered by moving the N×N kernel...
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7318079 |
Method and device for filtering a video signal
A method and device operable per the method for high-pass filtering an input signal having a sequence of signal values to provide a high-pass filtered output signal having a sequence of filtered...
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7315875 |
Data filtering
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...
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7305425 |
Method and device for digital filtering of interpolated values
In the digital filtering of an input signal ( 3 ), which has been produced by interpolation of a pilot signal ( 2 ), under certain circumstances numerous values originating from the past have to be...
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7304597 |
Adaptive interpolation for use in reducing signal spurs
A method and apparatus for acquiring an analog signal. The method of the invention comprising the steps of acquiring a first portion of the analog signal by a first channel, the first portion of...
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7298854 |
Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing
Apparatus, methods and articles of manufacture are disclosed for modifying electromagnetic waves by reducing noise in those waves. A transfer function for a plurality of segments is derived through...
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7292630 |
Limit-cycle-free FIR/IIR halfband digital filter with shared registers for high-speed sigma-delta A/D and D/A converters
A multiplexed FIR/IIR digital filter structure ( 300 ) which offers linear phase response and low group delay by switching on a FIR filter portion ( 31 ) or a IIR filter portion ( 32 ). To reduce...
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7290021 |
Method and apparatus for parallel signal processing
Disclosed is a method of providing signal processing operations, including convolution/filtering, where each parallel stream is processing signals at a lower rate than the signal data rate itself...
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7277479 |
Reconfigurable fir filter
A series of digit processing units (DPUs) are connected to form a finite impulse response (FIR) filter. Each DPU includes a register, a multiplexer, and a coefficient multiplier. The register...
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7274736 |
Multiple path equalization for multicarrier systems
A dual path equalization structure is used to equalize DMT systems operating over channels in which different impairments dominate the performance of different parts of the channel. Two TEQ/DFT...
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7262716 |
Asynchronous sample rate converter and method
An asynchronous sample rate converter interpolates and filters a digital audio input signal to produce a filtered, up-sampled first signal. A FIFO memory receives the first signal and stores...
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7248980 |
Method and apparatus for removing quantization effects in a quantized signal
One embodiment of the present invention provides a system that reconstructs a high-resolution signal from a set of low-resolution quantized samples. During operation, the system receives a time...
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7236550 |
Method and apparatus for tail cancellation equalization
Subtraction of a signal 111 from a pulse response 110 , where signal 111 provides a good approximation of the tail of pulse response 110 , can provide a method for canceling the tail of pulse...
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7236997 |
Filter processing apparatus and method
The present invention is applicable to a wavelet transform in JPEG 2000 and makes it possible to implement a convolution operation while reversibility is achieved. To this end, an implementation of...
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7233967 |
Reflection filter
A method and apparatus for generating a reflection filter. The method comprises the steps of determining an averaged step response of an acquired signal and generating a spectrum response from the...
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7230982 |
Decision feedback equalizer for minimum and maximum phase channels
This invention describes an apparatus and method to improve the performance of a decision feedback equalizer (DFE) for time-varying multi-path channels. For minimum-phase channels, the equalization...
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7227902 |
Method and apparatus for digital channelisation and de-channelisation
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to its use in wideband...
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7213042 |
Digital IF processing block having finite impulse response (FIR) decimation stages
A digital Intermediate Frequency (IF) processing block including a decimation filter having Finite Impulse Response (FIR) decimation stages provides improved performance over a Hogenauer decimating...
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7209938 |
Kalman filter with adaptive measurement variance estimator
A Kalman filtering technique employing an adaptive measurement variance estimator is disclosed. The Kalman filtering technique includes a signal filtering mechanism, the signal filtering mechanism...
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7206798 |
Apparatus and method for programmable dual stage digital filter
The present invention provides a dual stage digital filter and a method for filtering digital data signals. The dual stage digital filter includes a pre-filter, a main filter, and an output...
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7206341 |
System and method for providing equalization in a multiphase communications receiver
A circuit and method for receiving digital signals are disclosed. The circuit includes an input connected to a communications channel over which a digital signal is communicated and operates a...
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7200194 |
Receiver signal dynamic range compensation based on received signal strength indicator
A method for processing a received signal at a mobile receiver of a wireless communications system is disclosed. The method comprises demodulating the received signal to obtain an analog base band...
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7191025 |
Variable digital high and low pass filters
A system ( 10 ) for providing an integer number N of filters. The system comprises an input (D i ) for receiving a digital audio signal and an output (D o ) for providing a filtered audio signal....
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7184498 |
Device and method for the digital demodulation of a signal received by selecting a filter and digital communication receiver comprising same
The device ( 10 ) for digital demodulation comprises a polyphase filter ( 14 ) comprising a set of N distinct elementary digital filters and means ( 16 ) of selection, for each block of an...
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7177889 |
Methods and systems for efficient filtering of digital signals
A method in a signal processor for filtering samples in a digital signal is provided. An approximate filtered sample is generated as a function of less than four samples of the digital signal. A...
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7167513 |
IQ imbalance correction
An in-phase and guadrature (IQ) imbalance error-correction method includes estimating, on the basis of a constellation error in a received orthogonal frequency division multiplexing (OFDM) signal,...
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7161528 |
Device and method for the suppression of pulsed wireless signals
The invention relates to a method of suppressing pulsed signals in particular of DME or TACAN type present in the radio signals received (Ue) by a radio-frequency receiver, characterized in that...
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7162506 |
Integrated circuit with mode control for selecting settled and unsettled output from a filter
In a signal processing integrated circuit having an analog to digital converter and a digital filter having a plurality of taps separated in time, when starting a conversion after a reset or a...
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7154512 |
System and method for image warping
A system for generating a target pixel in a target grid from a plurality of source pixels in a source grid, said system comprising, a filter controller for determining a first distance between said...
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7151796 |
High performance equalizer with enhanced DFE having reduced complexity
An apparatus and method for implementing an equalizer which (1) combines the benefits of a decision feedback equalizer (DFE) with a maximum-a-posterori (MAP) equalizer (or a maximum likelihood...
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7152086 |
Method and arrangement for sample-rate conversion
Method and arrangement for converting the sample rate of a higher sample rate discrete time signal to a lower sample rate discrete time signal or vice versa. A recursive signal processing algorithm...
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7152082 |
Audio frequency response processing system
The invention provides a method and system for forming an output impulse response function. The method includes the steps of creating an initial impulse response, and dividing the impulse response...
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7152084 |
Parallelized infinite impulse response (IIR) and integrator filters
A digital parallelized Infinite Impulse Response (IIR) integrator filter comprising a first channel having a first input and second channel having a second input, a first adder to add the two...
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7152083 |
Jerk limited time delay filter
The invention includes a method of determining a control input. Such a control input may be used to dictate an input to a system, in order to bring the system from one state to another. In a method...
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7152081 |
Methods for efficient filtering of data
An apparatus and method for filtering data that include retrieving a plurality of data samples from memory; computing a locus of the samples; computing a distance between an input value and the...
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7133791 |
Two-mean level-crossing time interval estimation method
N-sample level-crossing estimator methods and devices are provided that extract more information from given time samples than the current two-sample approach and that are more resistant to...
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7129424 |
Multi-filter
The present invention relates to a method for weighing items and in particular to a method of filtering signals representing the weight of an item. The invention is applicable in all measuring...
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7127015 |
Digital filter for reducing voltage peaks
The present invention relates to a digital filter suitable for receiving a digital input signal (INPUT(G)) comprising a voltage peak also known as glitch (G). It is characterized in that it...
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7127016 |
Nonuniform oversampled filter banks for audio signal processing
A non-uniform filter bank is created by joining sections of oversampled uniform filter bands that are based on complex exponential modulation (as opposed to cosine modulation). Each filter bank...
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7120655 |
Digital filter
Methods and apparatus of signal processing are described. In a method according to one embodiment, a high-frequency region of a digital signal is detected. In response to the detecting, the...
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7117128 |
Method and apparatus for digital signal filtering
A Q-Filter is a reconfigurable technique that performs a continuum of linear and nonlinear filtering operations. It is modeled by unique mathematical structure, utilizing a function called the...
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7113559 |
Efficient methods for filtering to avoid inter-symbol interference and processing digital signals having large frequency guard bands
A circular filtering system that prevents the problem of inter-symbol interference. The circular filtering system utilizes a buffer memory to store samples of a given symbol and provide only these...
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7109906 |
NICAM encoder featuring synchronization of a NICAM processor with front-end input and output sections
A NICAM encoder ( 54 ) comprises a NICAM processor ( 82 ) and a front-end section ( 80,84 ) coupled to the NICAM processor. The front-end section is configured for operating with a system clock (...
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