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Bug 586519 - white Gaussian noise would be useful in audiotestsrc
white Gaussian noise would be useful in audiotestsrc
Status: RESOLVED FIXED
Product: GStreamer
Classification: Platform
Component: gst-plugins-base
git master
Other Linux
: Normal normal
: 0.10.24
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Blocks:
 
 
Reported: 2009-06-21 10:21 UTC by Kipp
Modified: 2009-06-21 10:28 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
add support for stationary white Gaussian noise (4.27 KB, patch)
2009-06-21 10:22 UTC, Kipp 		committed Details | Review
histogram of Gaussian noise output (4.78 KB, image/png)
2009-06-21 10:25 UTC, Kipp 		  Details

Description Kipp 2009-06-21 10:21:02 UTC 
Stationary white Gaussian noise is the prototypical noise model used in signal processing research.  It would be helpful if audiotestsrc could generate this kind of noise.
Comment 1 Kipp 2009-06-21 10:22:57 UTC 
Created attachment 137107 [details] [review]
add support for stationary white Gaussian noise

This patch adds support for stationary white Gaussian noise.  The Box-Muller algorithm is used to generate pairs of independent normally-distributed random numbers.
Comment 2 Kipp 2009-06-21 10:25:06 UTC 
Created attachment 137108 [details]
histogram of Gaussian noise output

Here is a histogram demonstrating the output of the patch above.  The theoretical probability density is superimposed on the observed distribution of outputs of the noise generator.
Comment 3 Sebastian Dröge (slomo) 2009-06-21 10:28:59 UTC 
ommit 8d3872df5cf4c17065014e41ee63435ce5eda0c8
Author: Kipp Cannon <kcannon@ligo.caltech.edu>
Date:   Sun Jun 21 12:27:37 2009 +0200

    audiotestsrc: Add support for generating gaussian white noise
    
    This patch adds support for stationary white Gaussian noise.
    The Box-Muller algorithm is used to generate pairs of independent
    normally-distributed random numbers.
    
    Fixes bug #586519.