A second-order DC rejection filter is uselsss unless we have complex
poles. However, complex poles means we have to compute the filter as a
single pass (rather than two casdaded first-order filters), which has
numerical issues that would require a higher complexity to solve.
So rather than waste cycles with a second-order filter (with a longer
impulse response), we just go with a first-order filter.

It adds a libssp-0.dll dependency and prevents static linking

Gustaf Ullberg authored 7 years ago and Jean-Marc Valin committed 7 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

The size overhead seems to be about 1% and the speed overhead is
"in the noise" (<2%).
The automake code is copied from opus-tools

Fixes a "regression" from 1.2 to 1.3-beta that was especially noticeable
on a Korean speech sample. (it wasn't a real regression since 1.2 only
worked because it was using CELT)

Reported by Chandrakala Madhira on the mailing list

Reported by daddesio in #opus

This improves cases where a whole region is dominated by a handful of tones

Also adds the error terms for band 0 that were previously omitted

That corresponds to the fundamental for the shortest pitch period allowed

This makes it possible to link dynamically with an uninstalled libopus.
It does require the executable to use libtool however.

Andrew Allen authored 7 years ago and Jean-Marc Valin committed 7 years ago

Change-Id: I3db285875b6b5548decc436be00096b97be1be3c
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Andrew Allen authored 7 years ago and Jean-Marc Valin committed 7 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Andrew Allen authored 7 years ago and Jean-Marc Valin committed 7 years ago

Modified by Jean-Marc Valin

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Kári Tristan Helgason authored 7 years ago and Jean-Marc Valin committed 7 years ago

This fixes issues when using neon intrinsics on 64-bit
systems.

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Andrew Allen authored 7 years ago and Jean-Marc Valin committed 7 years ago

Ensure matrix is properly exported from
projection encoder.

Change-Id: I5ede77e4f4d0dc82074e2230780777af542a416e
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Larger network, using 8-bit weights

Andrew Allen authored 7 years ago and Jean-Marc Valin committed 7 years ago

OpusProjection* classes
MixingMatrix class
Projection tests

Change-Id: I98644466abf4ffd36e48bdecad1204d69e1539b9
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Roman Kalashnikov authored 7 years ago and Ralph Giles committed 7 years ago

Fixes a warning from PVS-Studio. This was a cut-and-paste error
from the stanza above and had no effect.

Signed-off-by: Ralph Giles <giles@thaumas.net>

Put the colon ':' before the continuation dots like all the
other entries.

Addresses issue https://github.com/xiph/opus/issues/54

Addresses issue https://github.com/xiph/opus/issues/58

Reported in https://github.com/xiph/opus/issues/55

The regression was introduced in 783ad767
by changes to celt_fir() that make it no longer in-place.

The masking term was previously completely broken (even in 1.1). The
bandwidth detection relies mostly on the noise floor and can only use
masking to cut one extra band. The 12-24 kHz energy is now normalized properly
but uses a higher noise floor due to the leakage in the resampler. Bandwidth
detection is still mostly useless at identifying SWB speech (it usually says
FB).

Based on two dense layers with a GRU layer in the middle

SILK was being allocated too few bits for stereo hybrid, often resulting
in forced narrowing of the width. We now allocate more bits to SILK
and reduce the threshold for narrowing. This improves quality enough that
the bitrate threshold for switching to SILK can be increased to 44 kb/s.