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Comp.dsp is a worldwide Usenet news group that is used to discuss various aspects of digital signal processing.

There are 17261 threads in our archives.

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Convert to higher sample rate [64 articles]
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B - 2014-04-19 22:21:00
Any opinions on the easiest way to convert an audio track to a higher sample rate? Mostly likely x2 or x4. It occurred to me that it could be done with FFT, then 'resample' but it seems like there...Convert to higher sample rate

How many ways to orient a cube -- check my math [2 articles]
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Tim Wescott - 2014-04-19 21:17:00
Imagine I have a table, a compass, and one cube. On this cube is marked out the 3-D Cartesian coordinate system: x, y, z, with z oriented per the right-hand rule. Now imagine that I put this c...How many ways to orient a cube -- check my math

the 0th and 1st derivative of a scary function [75 articles]
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robert bristow-johnson - 2014-04-19 21:00:00
in case anybody wonders why my participation might be a little spotty of late, take a look at this function of time: http://waterdata.usgs.gov/vt/nwis/uv?dd_cd=3D03&format=3Dgif&period=3D31&si= ...the 0th and 1st derivative of a scary function

IIR Coefficient Calculation [7 articles]
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ger_lough - 2014-04-19 20:49:00
I am having difficulty finding any info on how to calculate digital IIR filter coefficients. I know this can be done in MATLAB, for example, but I am interested in changing IIR specs on the fly. I hav...IIR Coefficient Calculation

Errors in phase due to wrong alignment/post processing? [6 articles]
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Peter Mairhofer - 2014-04-18 19:14:00
Hi, I hooked together a Vector Signal Generator (VSG) and a Vector Signal Analyzer (VSA). I create a complex signal "x" in MATLAB, sent it to the VSG which does I/Q modulation to RF (> 1GHz). ...Errors in phase due to wrong alignment/post processing?

Cheap spec an using an RTL-SDR
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Les Cargill - 2014-04-18 14:35:00
http://hansvi.be/wordpress/?p=91 -- Les Cargill ...Cheap spec an using an RTL-SDR

Data extrapolation to reconstruct signal [6 articles]
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fffranco - 2014-04-18 13:59:00
I try to expose my problem from the beginning: My goal is to get a continuous respiration signal deriving it from ECG signal. From the ECG (sampled at 500 Hz), after some filtering process and applyi...Data extrapolation to reconstruct signal

Pitch Estimation using spectral Autocorrelation method. [7 articles]
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2014-04-16 09:48:00
please help me to find pitch of a speech signal using spectral autocorrelation method. Thank You Regards Girish Babu S ...Pitch Estimation using spectral Autocorrelation method.

Generate digital dither [23 articles]
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B - 2014-04-13 09:36:00
Any recommended algorithms for generating digital dither signals? How is this normally done? ...Generate digital dither

Computationally efficient sqrt(x^2 + y^2 + z^2) [16 articles]
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Tim Wescott - 2014-04-13 08:37:00
Subject line says it: I need a quick, approximate (+/- 1%) 3D vector length given its Cartesean components. Processor is a nuthin-special ARM m4, without the coprocessor. The vector is in flo...Computationally efficient sqrt(x^2 + y^2 + z^2)
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