每日彙整: 2018-01-20

樹莓派、樹莓派之學習、樹莓派之教育

【鼎革‧革鼎】︰ Raspbian Stretch 《六之 K.2-sd.V 》

出於好奇，想嚐鮮

pyroomacoustics package

Module contents

pyroomacoustics

Provides
  1. Room impulse simulations via the image source model
  2. Simulation of sound propagation using STFT engine
  3. Reference implementations of popular algorithms for
  • beamforming
  • direction of arrival
  • adaptive filtering
  • etc

How to use the documentation

Documentation is available in two forms: docstrings provided with the code, and a loose standing reference guide, available from the pyroomacoustics readthedocs page.

We recommend exploring the docstrings using IPython, an advanced Python shell with TAB-completion and introspection capabilities. See below for further instructions.

The docstring examples assume that pyroomacoustics has been imported as pra:

>>> import pyroomacoustics as pra

Code snippets are indicated by three greater-than signs:

>>> x = 42
>>> x = x + 1

Use the built-in help function to view a function’s docstring:

>>> help(pra.stft)
...

 

模擬 ReSpeaker 4 Mic DOA 效果？

”’
DOA Algorithms
==============
 
This example demonstrates how to use the DOA object to perform direction of arrival
finding in 2D using one of several algorithms
 
– MUSIC [1]_
– SRP-PHAT [2]_
– CSSM [3]_
– WAVES [4]_
– TOPS [5]_
– FRIDA [6]_
 
.. [1] R. Schmidt, *Multiple emitter location and signal parameter estimation*,
IEEE Trans. Antennas Propag., Vol. 34, Num. 3, pp 276–280, 1986
 
.. [2] J. H. DiBiase, J H, *A high-accuracy, low-latency technique for talker localization
in reverberant environments using microphone arrays*, PHD Thesis, Brown University, 2000
 
.. [3] H. Wang, M. Kaveh, *Coherent signal-subspace processing for the detection and
estimation of angles of arrival of multiple wide-band sources*, IEEE Trans. Acoust.,
Speech, Signal Process., Vol. 33, Num. 4, pp 823–831, 1985
 
.. [4] E. D. di Claudio, R. Parisi, *WAVES: Weighted average of signal subspaces for
robust wideband direction finding*, IEEE Trans. Signal Process., Vol. 49, Num. 10,
2179–2191, 2001
 
.. [5] Y. Yeo-Sun, L. M. Kaplan, J. H. McClellan, *TOPS: New DOA estimator for wideband
signals*, IEEE Trans. Signal Process., Vol. 54, Num 6., pp 1977–1989, 2006
 
.. [6] H. Pan, R. Scheibler, E. Bezzam, I. Dokmanić, and M. Vetterli, *FRIDA:
FRI-based DOA estimation for arbitrary array layouts*, Proc. ICASSP,
pp 3186-3190, 2017
 
In this example, we generate some random signal for a source in the far field
and then simulate propagation using a fractional delay filter bank
corresponding to the relative microphone delays.
 
Then we perform DOA estimation and compare the errors for different algorithms
 
”’
 

 

因此略讀方法、文件，直啃範例

 

 

 

然後依樣畫葫蘆

 

 

 

彷彿 OK ！欲深入還須詳讀哩◎