655 research outputs found
Analysis of a non-minimum phase acoustic beamformer
The two input Griffiths-Jim acoustic beamformer is analysed in the frequency domain using
a Wiener type formulation. Unlike previous solutions the approach here is to look at the
problem of non-minimum phase acoustic transfer functions which are encountered in many
real filtering problems. The polynomial transfer function approach gives an elegant way of
obtaining the frequency response of the beamformer and gives new insight to the problem
in general
Pyroomacoustics: A Python package for audio room simulations and array processing algorithms
We present pyroomacoustics, a software package aimed at the rapid development
and testing of audio array processing algorithms. The content of the package
can be divided into three main components: an intuitive Python object-oriented
interface to quickly construct different simulation scenarios involving
multiple sound sources and microphones in 2D and 3D rooms; a fast C
implementation of the image source model for general polyhedral rooms to
efficiently generate room impulse responses and simulate the propagation
between sources and receivers; and finally, reference implementations of
popular algorithms for beamforming, direction finding, and adaptive filtering.
Together, they form a package with the potential to speed up the time to market
of new algorithms by significantly reducing the implementation overhead in the
performance evaluation step.Comment: 5 pages, 5 figures, describes a software packag
Implementation and evaluation of a low complexity microphone array for speaker recognition
Includes bibliographical references (leaves 83-86).This thesis discusses the application of a microphone array employing a noise canceling beamforming technique for improving the robustness of speaker recognition systems in a diffuse noise field
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