Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distributed Multi-Speaker Voice Activity Detection for Wireless Acoustic
  Sensor Networks   A distributed multi-speaker voice activity detection (DM-VAD) method for
wireless acoustic sensor networks (WASNs) is proposed. DM-VAD is required in
many signal processing applications, e.g. distributed speech enhancement based
on multi-channel Wiener filtering, but is non-existent up to date. The proposed
method neither requires a fusion center nor prior knowledge about the node
positions, microphone array orientations or the number of observed sources. It
consists of two steps: (i) distributed source-specific energy signal unmixing
(ii) energy signal based voice activity detection. Existing computationally
efficient methods to extract source-specific energy signals from the mixed
observations, e.g., multiplicative non-negative independent component analysis
(MNICA) quickly loose performance with an increasing number of sources, and
require a fusion center. To overcome these limitations, we introduce a
distributed energy signal unmixing method based on a source-specific node
clustering method to locate the nodes around each source. To determine the
number of sources that are observed in the WASN, a source enumeration method
that uses a Lasso penalized Poisson generalized linear model is developed. Each
identified cluster estimates the energy signal of a single (dominant) source by
applying a two-component MNICA. The VAD problem is transformed into a
clustering task, by extracting features from the energy signals and applying
K-means type clustering algorithms. All steps of the proposed method are
evaluated using numerical experiments. A VAD accuracy of $> 85 \%$ is achieved
for a challenging scenario where 20 nodes observe 7 sources in a simulated
reverberant rectangular room.

33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas