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7620673 |
Complimentary discrete fourier transform processor
Method and apparatus for a complimentary discrete Fourier transform processor. An input signal is sampled, samples then being sequentially delayed, channelized, and processed. Synthesized outputs...
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7613760 |
Efficient implementation of multi-channel integrators and differentiators in a programmable device
Efficiently implemented multi-channel integrators and multi-channel differentiators utilize a delay section in a single integrator or differentiator in lieu of parallel integrator or differentiator...
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7609181 |
Sampling frequency conversion apparatus
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...
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7599978 |
Digital signal decimation by subspace projection
A digital signal, x(n) (where n is an integer), is decimated by determining a signal vector, y(k), of size M by partitioning samples of the digital signal, x(n) according to sampling phases of the...
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7587440 |
Digital filter and filtering method
The digital filter has a first-stage decimation filter and a second-stage decimation filter. The second-stage decimation filter has a shifter that performs shift operation on a filter coefficient,...
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7577696 |
Multirate filter as well as display system and mobile telephone comprising said multirate filter
A multirate filter according to the invention comprises, a) an input unit ( 10 ) for receiving an input signal (Sin) and for providing a plurality of intermediate signals (IS 1 , IS 2 ) in response...
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7577220 |
Apparatus and method for readjustment of a sampling time in radio receivers
An apparatus for readjustment of a sampling time in a radio receiver includes a component for determination of any sampling time error in a discrete-value received signal that emits a sampling time...
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7561076 |
Front-end method for NICAM encoding
A NICAM encoding method comprises performing NICAM processing and coupling a front-end to the NICAM processing. The front-end processing operates with a system clock that is integer divisible such...
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7554465 |
Sampling rate conversion system
A sampling rate conversion system reduces the signal processing burdens carried by cellular phones, headsets, and other electronic devices. Because the system consumes fewer resources to convert...
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7529787 |
Apparatus and method for generating coefficient data, apparatus and method for processing information signal, program, and medium for recording the same
A device generates coefficient data of an estimating equation for converting a first information signal to a second information signal. The device performs decimation on a teacher signal to...
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7528745 |
Digital domain sampling rate converter
Techniques are described for sampling rate conversion in the digital domain by up-sampling and down-sampling a digital signal according to a selected intermediate sampling frequency. A prototype...
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7515664 |
Method of recovering data in asynchronous applications
Data is recovered in an asynchronous environment where a sampling clock is generated internally, and is not externally frequency locked, by using programmable delay modules each providing a number...
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7495610 |
System and method for decimating global positioning system signals
A system and method for sampling signal in a Global Positioning System (GPS) receiver or Code Division Multiple Access (CDMA) communication device are provided. In general, decimation circuitry is...
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7492289 |
Signal processing method and device
Periodically sampled digital data (e.g., digital audio data) are once stored in a work RAM and are then subjected to signal processing such as arithmetic operations using coefficients. A primary...
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7477323 |
Method and system for digital image magnification and reduction
An image scaling system for converting a sampling rate of an input video signal comprising input pixel data to produce a magnified or reduced output video image comprising output pixel data...
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7472150 |
Method and system for time sharing N consecutive half-band decimating-by-2-filters using a single filter
A method and system for time sharing N consecutive half-band decimating-by-2-filters using a single filter. Aspects of the method may comprise selecting a latched input signal and filtering, via a...
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7467172 |
N dimensional non-linear, static, adaptive, digital filter design using D scale non-uniform sampling
The present invention is a filter design that extracts information from a signal by employing D scale nonuniform sampling. In one embodiment a D scale multiresolution sampler, filter bank router,...
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7466247 |
Fractional-decimation signal processing
Methods for processing waveforms may include decimating an over-sampled waveform by identifying samples for which the sample's position within a data period indicates that is closest to a selected...
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7439885 |
Method and system for sample rate conversion
Described herein is a method and system for sampling rate conversion. A clamped cubic spline interpolator (CCSI) may be utilized to interpolate or decimate a source signal to provide samples at...
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7436333 |
Asynchronous sample rate converter
Various embodiments perform sample rate conversion of a sample series at an input rate to an output rate. A version of the sample series is corrected with timing error information generated by a...
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7424502 |
Non-uniform filter bank implementation
A method of searching for a best-match decimation vector of decimation factors for non-uniform filter bank, the best match vector allowing perfect or near-perfect reconstruction of an input signal...
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7415493 |
Asynchronous sampling rate conversion
An adaptive proportional integral control loop determines a ratio of the input sampling rate to the output sampling rate for use in asynchronous sample rate conversion. An input counter counts...
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7414550 |
Methods and systems for sample rate conversion and sample clock synchronization
The architecture for a combined universal sample rate converter and a sample clock synchronizer is presented. The universal sample rate converter can be applied, for example, to audio samples...
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7411531 |
Methods and apparatus for asynchronous sampling of a received signal at a downsampled rate
Methods and apparatus are provided for decimated interpolated clock/data recovery (ICDR) to perform asynchronous sampling of a received signal. A received signal is converted to a plurality of...
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7408485 |
Asynchronous sampling rate converter and method for audio DAC
A sample rate converter suitable for use in an audio DAC includes a first estimating circuit ( 32 A) generating first (TR) and second (STAMPR) signals synchronized to an asynchronous clock (MCLK)...
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7406492 |
Digital filter combination for interpolation
A digital filter combination for interpolating primary sample values of a sampled signal using an mth-order discrete-time filter and a kth-order continuous time interpolation filter, with m≧3 and...
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7403963 |
Re-sampling with an arbitrary scaling ratio
A simple to implement sample rate conversion system consisting of an input/output data flow controller, interpolation coefficient generation, and output data flow control to generate the converted...
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7403962 |
Interpolation filter design and application
A method for designing an interpolation filter begins by partitioning interpolation filtering into a plurality of interpolation filtering stages that are cascaded together. Each of the plurality of...
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7378996 |
Sampling rate conversion calculating apparatus
There provided is a low-cost, high performance sampling rate conversion calculating apparatus which achieves both a low delay characteristic required for conversational voice data and high quality...
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7376690 |
Time discrete filter comprising upsampling, sampling rate conversion and downsampling stages
A time discrete filter comprises a sampling rate converter provided with an input and an output, and a down-sampler having a down-sampling factor nd. The time discrete filter further comprises an...
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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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7327288 |
Variable interpolator for non-uniformly sampled signals and method
A variable interpolator ( 110 ) has an interpolation factor L for performing an interpolation of an input signal ( 124 ), where L is variable and includes a minimum value. The variable interpolator...
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7321913 |
Digital multirate filtering
A method of determining filter coefficients for filter stages in a multirate digital filter device to achieve a desired filter response. The method includes the step of determining a first...
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7318077 |
Method for two-dimensional representation, interpolation and compression of data
A method for representation, interpolation and/or compression of data includes identifying a two-dimensional interpolation function s(z) based on a sampling function a(z). A Cauchy integral theorem...
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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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7302459 |
Method and apparatus for digital sample rate conversion
The present invention may relate generally to a circuit for converting a first digital signal having a first sample rate to second digital signal having a second sample rate. The circuit may...
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7280878 |
Sample rate converter having distributed filtering
A method and a computer program product for sample rate conversion that features distributive or hybrid filtering to reduce unwanted artifacts, such as aliasing and the computational requirements...
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7271755 |
Resistor ladder interpolation for PGA and DAC
A voltage interpolation circuit includes a resistive ladder connected between ground and a voltage input and having a plurality of resistors with voltage taps between the resistors. An amplifier...
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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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7259700 |
Method and device for converting the sampling frequency of a digital signal
The invention relates to a method of converting sampling conversion with a predetermined ratio between an input frequency (Fsin) and an output frequency (Fsout). It comprises an initialization...
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7251271 |
Digital filter design
Method and apparatus for designing digital filters are provided. One method includes the steps of determining a real-valued discrete-frequency representation of a desired digital filter and...
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7245237 |
Digital sampling rate conversion using a poly-phase filter and a polynomial interpolator
According to some embodiments, digital sampling rate conversion is performed using a poly-phase filter and a polynomial interpolator.
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7231072 |
Image processing method and image converting apparatus
There is described an image processing method and an image converting apparatus for performing the image processing for recording the medical image information. The apparatus includes an image...
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7225213 |
Interpolation filter and method for digitally interpolating a digital signal
The invention relates to an interpolation filter and to a method for filtering a digital input signal. The interpolation filter has an amplitude characteristic with a low-pass-shaped damping curve...
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7224294 |
Compressing device and method, decompressing device and method, compressing/decompressing system, program, record medium
A compressing device comprises plural stages of delay circuits ( 1 −1 to 4 −1 ) and multiplying/adding circuits ( 5 −1 to 10 −1 ) that performs weighted addition of output data from the...
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7221724 |
Precision timing generation
A precision timing generator and an associate method provide a precise clock signal based on a reference clock signal. Using the reference clock signal in a phase locked loop or delay locked loop,...
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7206350 |
OFDM multiple sub-channel communication system
A transmitter and corresponding method for transmitting an OFDM signal in a communications channel, including a plurality of base-band OFDM modulators, each for modulating a respective data signal...
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7197524 |
Direct RF sampling for cable applications and other broadband signals
A sampling method implements direct RF sampling of the down-stream DOCSIS and Euro-DOCSIS cable plant signals present at the customer premises equipment (CPE).
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7196642 |
Circuitry and method for sampling audio data
A method for sampling audio data is provided. In this method, the audio data is received and sampled at a first sampling rate using a first interpolation calculation. Thereafter, the audio data...
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7170959 |
Tailored response cascaded integrator comb digital filter and methodology for parallel integrator processing
A tailored response cascaded integrator comb digital filter is disclosed which has a cascaded integrator structure, a cascaded comb structure, a first rate change component, a second rate change...
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