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Description
This paper considers the application of compressed sensing
to spherical acoustics in order to improve spatial sound
field reconstruction. More specifically, we apply compressed
sensing techniques to a set of Ambisonic sound signals to
obtain a super-resolution plane-wave decomposition of the
original sound field. That is to say, we investigate using
the plane-wave decomposition to increase the spherical harmonic
order of the Ambisonic sound scene. We refer to this
as upscaling the Ambisonic sound scene. A focus of the paper
is using sub-band analysis to make the plane-wave decomposition
more robust. Results show that the sub-band
analysis does indeed improve the robustness of the planewave
decomposition when dominant overlapping sources are
present or in noisy or diffuse sound conditions. Upscaling
Ambisonic sound scenes allows more loudspeakers to
be used for spatial sound field reconstruction, resulting in a
larger sweet spot and improved sound quality.