From f919f9dcbb54a08e6e26d6c229ce92fb784fa1b2 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Fri, 13 Apr 2012 18:36:53 -0400
Subject: Removed whitespace and added dtools/bin/remove-whitespace as a tool
to do this in the future.
The sed script was provided by Moritz Fischer.
---
gr-vocoder/lib/codec2/phase.c | 32 ++++++++++++++++----------------
1 file changed, 16 insertions(+), 16 deletions(-)
(limited to 'gr-vocoder/lib/codec2/phase.c')
diff --git a/gr-vocoder/lib/codec2/phase.c b/gr-vocoder/lib/codec2/phase.c
index 0e1a14a601..69cc6697fc 100644
--- a/gr-vocoder/lib/codec2/phase.c
+++ b/gr-vocoder/lib/codec2/phase.c
@@ -1,11 +1,11 @@
/*---------------------------------------------------------------------------*\
-
- FILE........: phase.c
- AUTHOR......: David Rowe
- DATE CREATED: 1/2/09
-
+
+ FILE........: phase.c
+ AUTHOR......: David Rowe
+ DATE CREATED: 1/2/09
+
Functions for modelling and synthesising phase.
-
+
\*---------------------------------------------------------------------------*/
/*
@@ -22,7 +22,7 @@
License for more details.
You should have received a copy of the GNU Lesser General Public License
- along with this program; if not,see <http://www.gnu.org/licenses/>.
+ along with this program; if not,see <http://www.gnu.org/licenses/>.
*/
#include "defines.h"
@@ -101,14 +101,14 @@ void aks_to_H(
phase_synth_zero_order()
- Synthesises phases based on SNR and a rule based approach. No phase
+ Synthesises phases based on SNR and a rule based approach. No phase
parameters are required apart from the SNR (which can be reduced to a
1 bit V/UV decision per frame).
The phase of each harmonic is modelled as the phase of a LPC
synthesis filter excited by an impulse. Unlike the first order
model the position of the impulse is not transmitted, so we create
- an excitation pulse train using a rule based approach.
+ an excitation pulse train using a rule based approach.
Consider a pulse train with a pulse starting time n=0, with pulses
repeated at a rate of Wo, the fundamental frequency. A pulse train
@@ -149,10 +149,10 @@ void aks_to_H(
This E[m] then gets passed through the LPC synthesis filter to
determine the final harmonic phase.
-
+
Comparing to speech synthesised using original phases:
- - Through headphones speech synthesised with this model is not as
+ - Through headphones speech synthesised with this model is not as
good. Through a loudspeaker it is very close to original phases.
- If there are voicing errors, the speech can sound clicky or
@@ -207,21 +207,21 @@ void phase_synth_zero_order(
G = 1.0;
aks_to_H(model, aks, G, H, order);
- /*
+ /*
Update excitation fundamental phase track, this sets the position
of each pitch pulse during voiced speech. After much experiment
I found that using just this frame's Wo improved quality for UV
sounds compared to interpolating two frames Wo like this:
-
+
ex_phase[0] += (*prev_Wo+mode->Wo)*N/2;
*/
-
+
ex_phase[0] += (model->Wo)*N;
ex_phase[0] -= TWO_PI*floor(ex_phase[0]/TWO_PI + 0.5);
r = TWO_PI/GLOTTAL_FFT_SIZE;
for(m=1; m<=model->L; m++) {
-
+
/* generate excitation */
if (model->voiced) {
@@ -254,7 +254,7 @@ void phase_synth_zero_order(
A_[m].imag = H[m].imag*Ex[m].real + H[m].real*Ex[m].imag;
/* modify sinusoidal phase */
-
+
new_phi = atan2(A_[m].imag, A_[m].real+1E-12);
model->phi[m] = new_phi;
}
--
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