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7619546 |
Asynchronous sample rate conversion using a digital simulation of an analog filter
The sample rate of a digital signal is converted by a digital simulation of an analog filter. The simulation can update the states of complex poles in the analog filter at arbitrary times using...
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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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7605737 |
Data encoding in a clocked data interface
One embodiment of the present invention includes a data transmission system. The system comprises a data transmitter that provides a plurality of data bits over at least one data line. The data...
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7605724 |
Method and apparatus for a transmission signal up-converting filter
A digital up-sampling converter (DUSC) employs a signal input provided by a digital signal process (DSP) at a first rate feeding a Square Root Raised Cosine (SRRC) filter which provides for table...
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7599451 |
Sample rate conversion module and applications thereof
A sample rate converter includes an upsampling module, a low pass filter, and a linear sample rate conversion module. The upsampling module is operably coupled up-sample a digital input signal...
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7592933 |
Techniques for 9B10B and 7B8B coding and decoding
A technique for encoding 9-binary symbol (9B) source vectors into 10-binary symbol (10B) encoded vectors include the steps of obtaining a plurality of 9B source vectors, and encoding the 9B source...
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7592932 |
Method and device for interpolating or decimating a signal
A method and a device for interpolating or decimating a signal is provided, the signal being processed by a plurality of signal processing means connected in series, which at least comprise means...
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7561077 |
Multiple stream multiple rate resampling component
A method of resampling a digital signal involves serially receiving a plurality of samples of said digital signal and applying a plurality of filter coefficients to a first subset of the plurality...
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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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7558685 |
Frequency resolution using compression
In a frequency analysis system, such as a signal detection system or a spectrum analyzer, the frequency domain resolution is enhanced by compression and decompression of the signal samples. The...
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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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7541947 |
Semiconductor devices, a system including semiconductor devices and methods thereof
Semiconductor devices, a system including said semiconductor devices and methods thereof are provided. An example semiconductor device may receive data scheduled for transmission, scramble an order...
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7535385 |
Time base adjustment in a data processing device
A data processing device and adjusting method for adjusting the timing of a higher-rate stream of second data samples derived from a lower-rate stream of first data samples are described. A...
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7533106 |
Data structures and circuit for multi-channel data transfers using a serial peripheral interface
A serial interface controller provides for transferring data between a data source having a least one channel and a processor. The serial interface controller has a plurality of control registers;...
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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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7522074 |
Enhanced control for compression and decompression of sampled signals
Control of signal compression is coordinated by selectively modifying control parameters affecting the bit rate, sample rate, dynamic range and compression operations. Selected control parameters...
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7515073 |
Digital sample rate conversion
Embodiments of an apparatus for sample rate conversion are described. Various embodiments include an interpolator configured to interpolate a digital input data stream by using values of an...
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7508327 |
Integer representation of relative timing between desired output samples and corresponding input samples
In general, this disclosure describes techniques for changing a sampling frequency of a digital signal. In particular, the techniques provide a more accurate way to determining a relative timing...
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7504970 |
Data encoder
A data encoder. The novel encoder includes a first circuit for generating a fundamental sequence coded data stream from an incoming input data stream, a second circuit for generating a k-split data...
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7498958 |
Fractional sampling filter
A fractional up-sampling filter is configured to convert a lower data rate to a higher data rate by using methods of interpolation to generate output digital data that corresponds to the higher...
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7498957 |
Jitter-free sample rate conversion
A method and apparatus are described for asynchronous sample rate conversion, in particular those which use an interpolating filter, especially a polyphase interpolating filter (FB 4 ). The input...
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7492848 |
Method and apparatus for efficient multi-stage FIR filters
An interpolation filter without a FIFO memory is configured as a cascade arrangement of simpler interpolation sub-filters that are operated in reverse order. The interpolation sub-filter that...
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7492291 |
Methods and apparatus for interfacing a plurality of encoded serial data streams to a serializer/deserializer circuit
Methods and apparatus are provided for interfacing a plurality of encoded serial data streams, such as Serial Gigabit Media Independent Interface streams, to a serializer/deserializer circuit. A...
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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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7489259 |
Sample rate converter and method to perform sample rate conversion
Embodiments of a sample rate converter and method for sample rate conversion are generally described herein. In some embodiments, an interpolation module calculates new digital samples for...
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7486207 |
Method and device for changing an encoding mode of encoded data streams
A method, a component, a system, and a computer program for changing an encoding mode of an encoded data stream from a first encoding mode to a second encoding mode are disclosed. The encoded data...
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7479912 |
Low-power high-performance audio DAC system including internal oscillator, FIFO memory, and ASRC
A low-power data conversion system for converting a serial digital data input signal (DIN) to an analog output signal (Vout) by generating the serial digital data input signal (DIN) at a first...
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7477170 |
Sample rate converter system and method
A sample rate conversion is accomplished by presenting to a numerically controlled oscillator (NCO) register a clock input at the desired output rate; first-modifying the NCO register contents...
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7474235 |
Automatic power control system for optical disc drive and method thereof
An automatic power control system, a down sampling circuit and a down sampling method. The automatic power control system is incorporated in an optical disc drive comprising a laser diode for...
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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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7463170 |
Method and system for processing multi-rate audio from a plurality of audio processing sources
An audio codec in a wireless device may be utilized for up sampling two or more audio signals to a same data sampling rate. Each audio signal, such as digital audio, voice, and polyringer, for...
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7456762 |
Scaling of sampling position in sample rate converter
An iterative method provides an output value at each iteration, indicating a time position of an output sample to be generated in a subsequent processing step, relative to the time position of a...
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7450036 |
Sample rate converter having a zero-phase filter
A sample rate converter for converting a digital input signal having a first sample rate into a digital output signal having a second sample rate, wherein the second sample rate is different from...
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7446692 |
Digital radio system and method of operation
A digital radio system comprises a mixer and an analog-to-digital converter communicative coupled to the mixer. The mixer generates an intermediate frequency signal based at least in part upon a...
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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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7439884 |
Sampling rate conversion device and method, and audio device
A sampling rate converter able to obtain an amplitude characteristic that passes any frequency and able to achieve a high precision conversion without depending upon a cutoff frequency, having an...
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7437298 |
Method and apparatus for mobile phone using semiconductor device capable of inter-processing voice signal and audio signal
A method and apparatus of mobile phone using a semiconductor device includes a first converter, a second converter, a first digital processing circuit, and a second digital processing circuit. The...
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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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7436332 |
Runlength encoding of leading ones and zeros
A method and an encoder ( 1001 ) are disclosed for encoding an input bitstream derived from a block of coefficients relating to video data. Leading zeros and tailing zeros are determined and...
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7424274 |
Digital transmitter and method
A transmitter and method is provided for digitally upconverting a baseband digital signal to a modulated intermediate frequency (IF) digital signal and sigma-delta modulating the IF digital signal....
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7421024 |
Method for transcoding MPEG encoded streams
A system and method of transcoding video data for distribution over a variety of media. A digital data stream is decoded and optionals down sampled to reduce the bit rate of the original stream....
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7417569 |
Sampling rate converter with no timing drift and bounded amplitude error
Aspects of a sampling rate converter with no timing drift and with bounded amplitude error are presented. Aspects of the method may include computing an intermediate sum by adding a numerator...
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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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7411525 |
Sampling rate converting method and circuit
A sampling rate converting circuit receives plural pieces of input data having different sampling frequencies. A plurality of FIR circuits is shared to reduce a circuit area, and, in a case where a...
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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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7405679 |
Techniques for 9B10B and 7B8B coding and decoding
A technique for encoding 9-binary symbol (9B) source vectors into 10-binary symbol (10B) encoded vectors include the steps of obtaining a plurality of 9B source vectors, and encoding the 9B source...
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7403548 |
System for interfacing media access control module to small form factor pluggable module
A communication system includes a link module having a first serial interface for interfacing to a serial link. The link module also including a second serial interface. The system also includes a...
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7403139 |
Electronic apparatus and control method thereof using sample rate converter
An electronic apparatus reads a digital data stream including a video signal and/or an audio signal outputted from an external apparatus according to a transmission clock different from a clock for...
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7400276 |
Method and apparatus for reducing delay in a bus provided from parallel, capacitively coupled transmission lines
A mechanism for use with a bus provided from parallel, capacitively-coupled bus lines to restrict a number of possible transitions on the bus to a number that is smaller than the maximum number of...
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