Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple-Speaker Localization Based on Direct-Path Features and
  Likelihood Maximization with Spatial Sparsity Regularization   This paper addresses the problem of multiple-speaker localization in noisy
and reverberant environments, using binaural recordings of an acoustic scene. A
Gaussian mixture model (GMM) is adopted, whose components correspond to all the
possible candidate source locations defined on a grid. After optimizing the
GMM-based objective function, given an observed set of binaural features, both
the number of sources and their locations are estimated by selecting the GMM
components with the largest priors. This is achieved by enforcing a sparse
solution, thus favoring a small number of speakers with respect to the large
number of initial candidate source locations. An entropy-based penalty term is
added to the likelihood, thus imposing sparsity over the set of GMM priors. In
addition, the direct-path relative transfer function (DP-RTF) is used to build
robust binaural features. The DP-RTF, recently proposed for single-source
localization, was shown to be robust to reverberations, since it encodes
inter-channel information corresponding to the direct-path of sound
propagation. In this paper, we extend the DP-RTF estimation to the case of
multiple sources. In the short-time Fourier transform domain, a consistency
test is proposed to check whether a set of consecutive frames is associated to
the same source or not. Reliable DP-RTF features are selected from the frames
that pass the consistency test to be used for source localization. Experiments
carried out using both simulation data and real data gathered with a robotic
head confirm the efficiency of the proposed multi-source localization method.

16
The categories of this paper are: stat
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con