This patch contains improvements to TDFB setup scripts and examples
those are related to sound direction estimation. The changes are add
of 15 degree angle spacing to enum control, add of rotated noise sound
create for sound direction testing in simulated acoustics.
The example line, circular, and xyz array scripts are updated for single
dual mono beam that is controllable in 15 degree or 30 degree steps. All
the two beam design examples are moved into example_two_beams.m.
The patch also contains noise field covariance matrix diagonal load
increase to -40 dB. I noticed uneven frequency response in some
designs due to numerical instability. The increased diagonal load makes
the automatic design procedure more robust at minimal hit in noise
suppression performance.
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This patch essentially adds support for steer_az/steer_el to be
vector instead of scalar. The beam off preset is added by default
automatically for N-channel in N-channel out configurations. Microphone
(x,y,z) coordinates are passed in to blob for direction of arrival
reporting.
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This patch adds the tool for creating beamformer configurations. The
microphone array geometry and beam angle (azimuth, elevation) need
to be specified. See the example scripts and sample array helper
functions.
The FIR blob quantize function needed a minor change to prevent strip
of trailing zero coefficients. The beamformer filter bank needs to use
equal length filters.
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
Seppo Ingalsuo