From 1a7b7b972b2f8d87d105895d0026bc5275dfb8eb Mon Sep 17 00:00:00 2001
From: drowe67 <drowe67@01035d8c-6547-0410-b346-abe4f91aad63>
Date: Wed, 2 Nov 2011 06:04:27 +0000
Subject: [PATCH] first pass at delta time coding of LSPs in c2sim, sounds
 pretty good with --lspd --lspdt for 25/15 bits every 20,40ms frame

git-svn-id: https://svn.code.sf.net/p/freetel/code@298 01035d8c-6547-0410-b346-abe4f91aad63
---
 codec2-dev/src/c2sim.c                |  38 +-
 codec2-dev/src/codebook/lspdt1-4.txt  |  82 +++
 codec2-dev/src/codebook/lspdt5-10.txt | 730 ++++++++++++++++++++++
 codec2-dev/src/codebookdt.c           | 843 ++++++++++++++++++++++++++
 codec2-dev/src/quantise.c             |  10 +-
 5 files changed, 1679 insertions(+), 24 deletions(-)
 create mode 100644 codec2-dev/src/codebook/lspdt1-4.txt
 create mode 100644 codec2-dev/src/codebook/lspdt5-10.txt
 create mode 100644 codec2-dev/src/codebookdt.c

diff --git a/codec2-dev/src/c2sim.c b/codec2-dev/src/c2sim.c
index 59ce66c7..f0b711ef 100644
--- a/codec2-dev/src/c2sim.c
+++ b/codec2-dev/src/c2sim.c
@@ -121,6 +121,7 @@ int main(int argc, char *argv[])
   float lsps[LPC_ORD];
   float prev_lsps[LPC_ORD];
   float lsps__prev[LPC_ORD];
+  float lsps__prev2[LPC_ORD];
   float e, prev_e;
   float ak_interp[LPC_MAX];
 
@@ -145,7 +146,7 @@ int main(int argc, char *argv[])
   }
   for(i=0; i<LPC_ORD; i++) {
       prev_lsps[i] = i*PI/(LPC_ORD+1);
-      lsps__prev[i] = i*PI/(LPC_ORD+1);
+      lsps__prev[i] = lsps__prev2[i] = i*PI/(LPC_ORD+1);
   }
   e = prev_e = 1;
   hpf_states[0] = hpf_states[1] = 0.0;
@@ -300,7 +301,7 @@ int main(int argc, char *argv[])
 	
 	/* determine voicing */
 
-	snr = est_voicing_mbe(&model, Sw, Sw_, Ew, W, prev_Wo);
+	snr = est_voicing_mbe(&model, Sw, W, Sw_, Ew, prev_Wo);
 #ifdef DUMP
 	dump_Sw_(Sw_);
 	dump_Ew(Ew);
@@ -356,26 +357,27 @@ int main(int argc, char *argv[])
 	    lsp_to_lpc(lsps_, ak, LPC_ORD);
 	}
 
-	if (lspdt) {
-#define ALTERNATE		
-#ifdef ALTERNATE
+	if (lspdt && !decimate) {
 	    if (frames%2) {
-		//locate_lsps_jnd_steps(lsps, LPC_ORD);
-		//lspvq_quantise(lsps, lsps_, LPC_ORD);
-		for(i=0; i<LPC_ORD; i++) {
-		    lsps_[i] = lsps[i];
-		    lsps__prev[i] = lsps_[i];
-		}
+		lspdt_quantise(lsps, lsps_, lsps__prev);
+		bw_expand_lsps(lsps_, LPC_ORD);
+		lsp_to_lpc(lsps_, ak, LPC_ORD);
+	    }
+	    for(i=0; i<LPC_ORD; i++) {
+		lsps__prev[i] = lsps_[i];
+	    }
+	}
 
+	if (lspdt && decimate) {
+	    if ((frames%4) == 3) {
+		lspdt_quantise(lsps, lsps_, lsps__prev2);
+		bw_expand_lsps(lsps_, LPC_ORD);
+		lsp_to_lpc(lsps_, ak, LPC_ORD);
 	    }
-	    else {
-		lspdt_quantise(lsps, lsps_, lsps__prev);
+	    for(i=0; i<LPC_ORD; i++) {
+		lsps__prev2[i] = lsps__prev[i];
+		lsps__prev[i] = lsps_[i];
 	    }
-#else
-	    lspdt_quantise(lsps, lsps_, lsps__prev);
-#endif
-	    //locate_lsps_jnd_steps(lsps_, LPC_ORD);
-	    lsp_to_lpc(lsps_, ak, LPC_ORD);
 	}
 
 #ifdef DUMP
diff --git a/codec2-dev/src/codebook/lspdt1-4.txt b/codec2-dev/src/codebook/lspdt1-4.txt
new file mode 100644
index 00000000..890001f2
--- /dev/null
+++ b/codec2-dev/src/codebook/lspdt1-4.txt
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diff --git a/codec2-dev/src/codebook/lspdt5-10.txt b/codec2-dev/src/codebook/lspdt5-10.txt
new file mode 100644
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--- /dev/null
+++ b/codec2-dev/src/codebook/lspdt5-10.txt
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diff --git a/codec2-dev/src/codebookdt.c b/codec2-dev/src/codebookdt.c
new file mode 100644
index 00000000..27723236
--- /dev/null
+++ b/codec2-dev/src/codebookdt.c
@@ -0,0 +1,843 @@
+/* THIS IS A GENERATED FILE. Edit generate_codebook.c and its input */
+
+/*
+ * This intermediary file and the files that used to create it are under 
+ * The LGPL. See the file COPYING.
+ */
+
+#include "defines.h"
+
+  /* codebook/lspdt1-4.txt */
+static const float codes0[] = {
+  -25,  -25,  -50,  -50,
+  0,  -25,  -50,  -50,
+  25,  -25,  -50,  -50,
+  -25,  0,  -50,  -50,
+  0,  0,  -50,  -50,
+  25,  0,  -50,  -50,
+  -25,  25,  -50,  -50,
+  0,  25,  -50,  -50,
+  25,  25,  -50,  -50,
+  -25,  -25,  0,  -50,
+  0,  -25,  0,  -50,
+  25,  -25,  0,  -50,
+  -25,  0,  0,  -50,
+  0,  0,  0,  -50,
+  25,  0,  0,  -50,
+  -25,  25,  0,  -50,
+  0,  25,  0,  -50,
+  25,  25,  0,  -50,
+  -25,  -25,  50,  -50,
+  0,  -25,  50,  -50,
+  25,  -25,  50,  -50,
+  -25,  0,  50,  -50,
+  0,  0,  50,  -50,
+  25,  0,  50,  -50,
+  -25,  25,  50,  -50,
+  0,  25,  50,  -50,
+  25,  25,  50,  -50,
+  -25,  -25,  -50,  0,
+  0,  -25,  -50,  0,
+  25,  -25,  -50,  0,
+  -25,  0,  -50,  0,
+  0,  0,  -50,  0,
+  25,  0,  -50,  0,
+  -25,  25,  -50,  0,
+  0,  25,  -50,  0,
+  25,  25,  -50,  0,
+  -25,  -25,  0,  0,
+  0,  -25,  0,  0,
+  25,  -25,  0,  0,
+  -25,  0,  0,  0,
+  0,  0,  0,  0,
+  25,  0,  0,  0,
+  -25,  25,  0,  0,
+  0,  25,  0,  0,
+  25,  25,  0,  0,
+  -25,  -25,  50,  0,
+  0,  -25,  50,  0,
+  25,  -25,  50,  0,
+  -25,  0,  50,  0,
+  0,  0,  50,  0,
+  25,  0,  50,  0,
+  -25,  25,  50,  0,
+  0,  25,  50,  0,
+  25,  25,  50,  0,
+  -25,  -25,  -50,  50,
+  0,  -25,  -50,  50,
+  25,  -25,  -50,  50,
+  -25,  0,  -50,  50,
+  0,  0,  -50,  50,
+  25,  0,  -50,  50,
+  -25,  25,  -50,  50,
+  0,  25,  -50,  50,
+  25,  25,  -50,  50,
+  -25,  -25,  0,  50,
+  0,  -25,  0,  50,
+  25,  -25,  0,  50,
+  -25,  0,  0,  50,
+  0,  0,  0,  50,
+  25,  0,  0,  50,
+  -25,  25,  0,  50,
+  0,  25,  0,  50,
+  25,  25,  0,  50,
+  -25,  -25,  50,  50,
+  0,  -25,  50,  50,
+  25,  -25,  50,  50,
+  -25,  0,  50,  50,
+  0,  0,  50,  50,
+  25,  0,  50,  50,
+  -25,  25,  50,  50,
+  0,  25,  50,  50,
+  25,  25,  50,  50
+};
+  /* codebook/lspdt5-10.txt */
+static const float codes1[] = {
+  -50,  -50,  -50,  -50,  -50,  -50,
+  0,  -50,  -50,  -50,  -50,  -50,
+  50,  -50,  -50,  -50,  -50,  -50,
+  -50,  0,  -50,  -50,  -50,  -50,
+  0,  0,  -50,  -50,  -50,  -50,
+  50,  0,  -50,  -50,  -50,  -50,
+  -50,  50,  -50,  -50,  -50,  -50,
+  0,  50,  -50,  -50,  -50,  -50,
+  50,  50,  -50,  -50,  -50,  -50,
+  -50,  -50,  0,  -50,  -50,  -50,
+  0,  -50,  0,  -50,  -50,  -50,
+  50,  -50,  0,  -50,  -50,  -50,
+  -50,  0,  0,  -50,  -50,  -50,
+  0,  0,  0,  -50,  -50,  -50,
+  50,  0,  0,  -50,  -50,  -50,
+  -50,  50,  0,  -50,  -50,  -50,
+  0,  50,  0,  -50,  -50,  -50,
+  50,  50,  0,  -50,  -50,  -50,
+  -50,  -50,  50,  -50,  -50,  -50,
+  0,  -50,  50,  -50,  -50,  -50,
+  50,  -50,  50,  -50,  -50,  -50,
+  -50,  0,  50,  -50,  -50,  -50,
+  0,  0,  50,  -50,  -50,  -50,
+  50,  0,  50,  -50,  -50,  -50,
+  -50,  50,  50,  -50,  -50,  -50,
+  0,  50,  50,  -50,  -50,  -50,
+  50,  50,  50,  -50,  -50,  -50,
+  -50,  -50,  -50,  0,  -50,  -50,
+  0,  -50,  -50,  0,  -50,  -50,
+  50,  -50,  -50,  0,  -50,  -50,
+  -50,  0,  -50,  0,  -50,  -50,
+  0,  0,  -50,  0,  -50,  -50,
+  50,  0,  -50,  0,  -50,  -50,
+  -50,  50,  -50,  0,  -50,  -50,
+  0,  50,  -50,  0,  -50,  -50,
+  50,  50,  -50,  0,  -50,  -50,
+  -50,  -50,  0,  0,  -50,  -50,
+  0,  -50,  0,  0,  -50,  -50,
+  50,  -50,  0,  0,  -50,  -50,
+  -50,  0,  0,  0,  -50,  -50,
+  0,  0,  0,  0,  -50,  -50,
+  50,  0,  0,  0,  -50,  -50,
+  -50,  50,  0,  0,  -50,  -50,
+  0,  50,  0,  0,  -50,  -50,
+  50,  50,  0,  0,  -50,  -50,
+  -50,  -50,  50,  0,  -50,  -50,
+  0,  -50,  50,  0,  -50,  -50,
+  50,  -50,  50,  0,  -50,  -50,
+  -50,  0,  50,  0,  -50,  -50,
+  0,  0,  50,  0,  -50,  -50,
+  50,  0,  50,  0,  -50,  -50,
+  -50,  50,  50,  0,  -50,  -50,
+  0,  50,  50,  0,  -50,  -50,
+  50,  50,  50,  0,  -50,  -50,
+  -50,  -50,  -50,  50,  -50,  -50,
+  0,  -50,  -50,  50,  -50,  -50,
+  50,  -50,  -50,  50,  -50,  -50,
+  -50,  0,  -50,  50,  -50,  -50,
+  0,  0,  -50,  50,  -50,  -50,
+  50,  0,  -50,  50,  -50,  -50,
+  -50,  50,  -50,  50,  -50,  -50,
+  0,  50,  -50,  50,  -50,  -50,
+  50,  50,  -50,  50,  -50,  -50,
+  -50,  -50,  0,  50,  -50,  -50,
+  0,  -50,  0,  50,  -50,  -50,
+  50,  -50,  0,  50,  -50,  -50,
+  -50,  0,  0,  50,  -50,  -50,
+  0,  0,  0,  50,  -50,  -50,
+  50,  0,  0,  50,  -50,  -50,
+  -50,  50,  0,  50,  -50,  -50,
+  0,  50,  0,  50,  -50,  -50,
+  50,  50,  0,  50,  -50,  -50,
+  -50,  -50,  50,  50,  -50,  -50,
+  0,  -50,  50,  50,  -50,  -50,
+  50,  -50,  50,  50,  -50,  -50,
+  -50,  0,  50,  50,  -50,  -50,
+  0,  0,  50,  50,  -50,  -50,
+  50,  0,  50,  50,  -50,  -50,
+  -50,  50,  50,  50,  -50,  -50,
+  0,  50,  50,  50,  -50,  -50,
+  50,  50,  50,  50,  -50,  -50,
+  -50,  -50,  -50,  -50,  0,  -50,
+  0,  -50,  -50,  -50,  0,  -50,
+  50,  -50,  -50,  -50,  0,  -50,
+  -50,  0,  -50,  -50,  0,  -50,
+  0,  0,  -50,  -50,  0,  -50,
+  50,  0,  -50,  -50,  0,  -50,
+  -50,  50,  -50,  -50,  0,  -50,
+  0,  50,  -50,  -50,  0,  -50,
+  50,  50,  -50,  -50,  0,  -50,
+  -50,  -50,  0,  -50,  0,  -50,
+  0,  -50,  0,  -50,  0,  -50,
+  50,  -50,  0,  -50,  0,  -50,
+  -50,  0,  0,  -50,  0,  -50,
+  0,  0,  0,  -50,  0,  -50,
+  50,  0,  0,  -50,  0,  -50,
+  -50,  50,  0,  -50,  0,  -50,
+  0,  50,  0,  -50,  0,  -50,
+  50,  50,  0,  -50,  0,  -50,
+  -50,  -50,  50,  -50,  0,  -50,
+  0,  -50,  50,  -50,  0,  -50,
+  50,  -50,  50,  -50,  0,  -50,
+  -50,  0,  50,  -50,  0,  -50,
+  0,  0,  50,  -50,  0,  -50,
+  50,  0,  50,  -50,  0,  -50,
+  -50,  50,  50,  -50,  0,  -50,
+  0,  50,  50,  -50,  0,  -50,
+  50,  50,  50,  -50,  0,  -50,
+  -50,  -50,  -50,  0,  0,  -50,
+  0,  -50,  -50,  0,  0,  -50,
+  50,  -50,  -50,  0,  0,  -50,
+  -50,  0,  -50,  0,  0,  -50,
+  0,  0,  -50,  0,  0,  -50,
+  50,  0,  -50,  0,  0,  -50,
+  -50,  50,  -50,  0,  0,  -50,
+  0,  50,  -50,  0,  0,  -50,
+  50,  50,  -50,  0,  0,  -50,
+  -50,  -50,  0,  0,  0,  -50,
+  0,  -50,  0,  0,  0,  -50,
+  50,  -50,  0,  0,  0,  -50,
+  -50,  0,  0,  0,  0,  -50,
+  0,  0,  0,  0,  0,  -50,
+  50,  0,  0,  0,  0,  -50,
+  -50,  50,  0,  0,  0,  -50,
+  0,  50,  0,  0,  0,  -50,
+  50,  50,  0,  0,  0,  -50,
+  -50,  -50,  50,  0,  0,  -50,
+  0,  -50,  50,  0,  0,  -50,
+  50,  -50,  50,  0,  0,  -50,
+  -50,  0,  50,  0,  0,  -50,
+  0,  0,  50,  0,  0,  -50,
+  50,  0,  50,  0,  0,  -50,
+  -50,  50,  50,  0,  0,  -50,
+  0,  50,  50,  0,  0,  -50,
+  50,  50,  50,  0,  0,  -50,
+  -50,  -50,  -50,  50,  0,  -50,
+  0,  -50,  -50,  50,  0,  -50,
+  50,  -50,  -50,  50,  0,  -50,
+  -50,  0,  -50,  50,  0,  -50,
+  0,  0,  -50,  50,  0,  -50,
+  50,  0,  -50,  50,  0,  -50,
+  -50,  50,  -50,  50,  0,  -50,
+  0,  50,  -50,  50,  0,  -50,
+  50,  50,  -50,  50,  0,  -50,
+  -50,  -50,  0,  50,  0,  -50,
+  0,  -50,  0,  50,  0,  -50,
+  50,  -50,  0,  50,  0,  -50,
+  -50,  0,  0,  50,  0,  -50,
+  0,  0,  0,  50,  0,  -50,
+  50,  0,  0,  50,  0,  -50,
+  -50,  50,  0,  50,  0,  -50,
+  0,  50,  0,  50,  0,  -50,
+  50,  50,  0,  50,  0,  -50,
+  -50,  -50,  50,  50,  0,  -50,
+  0,  -50,  50,  50,  0,  -50,
+  50,  -50,  50,  50,  0,  -50,
+  -50,  0,  50,  50,  0,  -50,
+  0,  0,  50,  50,  0,  -50,
+  50,  0,  50,  50,  0,  -50,
+  -50,  50,  50,  50,  0,  -50,
+  0,  50,  50,  50,  0,  -50,
+  50,  50,  50,  50,  0,  -50,
+  -50,  -50,  -50,  -50,  50,  -50,
+  0,  -50,  -50,  -50,  50,  -50,
+  50,  -50,  -50,  -50,  50,  -50,
+  -50,  0,  -50,  -50,  50,  -50,
+  0,  0,  -50,  -50,  50,  -50,
+  50,  0,  -50,  -50,  50,  -50,
+  -50,  50,  -50,  -50,  50,  -50,
+  0,  50,  -50,  -50,  50,  -50,
+  50,  50,  -50,  -50,  50,  -50,
+  -50,  -50,  0,  -50,  50,  -50,
+  0,  -50,  0,  -50,  50,  -50,
+  50,  -50,  0,  -50,  50,  -50,
+  -50,  0,  0,  -50,  50,  -50,
+  0,  0,  0,  -50,  50,  -50,
+  50,  0,  0,  -50,  50,  -50,
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+  50,  50,  0,  -50,  50,  -50,
+  -50,  -50,  50,  -50,  50,  -50,
+  0,  -50,  50,  -50,  50,  -50,
+  50,  -50,  50,  -50,  50,  -50,
+  -50,  0,  50,  -50,  50,  -50,
+  0,  0,  50,  -50,  50,  -50,
+  50,  0,  50,  -50,  50,  -50,
+  -50,  50,  50,  -50,  50,  -50,
+  0,  50,  50,  -50,  50,  -50,
+  50,  50,  50,  -50,  50,  -50,
+  -50,  -50,  -50,  0,  50,  -50,
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+  50,  -50,  -50,  0,  50,  -50,
+  -50,  0,  -50,  0,  50,  -50,
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+  50,  0,  -50,  0,  50,  -50,
+  -50,  50,  -50,  0,  50,  -50,
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+  50,  50,  -50,  0,  50,  -50,
+  -50,  -50,  0,  0,  50,  -50,
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+  50,  -50,  0,  0,  50,  -50,
+  -50,  0,  0,  0,  50,  -50,
+  0,  0,  0,  0,  50,  -50,
+  50,  0,  0,  0,  50,  -50,
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+  -50,  -50,  -50,  50,  50,  -50,
+  0,  -50,  -50,  50,  50,  -50,
+  50,  -50,  -50,  50,  50,  -50,
+  -50,  0,  -50,  50,  50,  -50,
+  0,  0,  -50,  50,  50,  -50,
+  50,  0,  -50,  50,  50,  -50,
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+  -50,  0,  0,  50,  50,  -50,
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+  0,  -50,  -50,  50,  50,  50,
+  50,  -50,  -50,  50,  50,  50,
+  -50,  0,  -50,  50,  50,  50,
+  0,  0,  -50,  50,  50,  50,
+  50,  0,  -50,  50,  50,  50,
+  -50,  50,  -50,  50,  50,  50,
+  0,  50,  -50,  50,  50,  50,
+  50,  50,  -50,  50,  50,  50,
+  -50,  -50,  0,  50,  50,  50,
+  0,  -50,  0,  50,  50,  50,
+  50,  -50,  0,  50,  50,  50,
+  -50,  0,  0,  50,  50,  50,
+  0,  0,  0,  50,  50,  50,
+  50,  0,  0,  50,  50,  50,
+  -50,  50,  0,  50,  50,  50,
+  0,  50,  0,  50,  50,  50,
+  50,  50,  0,  50,  50,  50,
+  -50,  -50,  50,  50,  50,  50,
+  0,  -50,  50,  50,  50,  50,
+  50,  -50,  50,  50,  50,  50,
+  -50,  0,  50,  50,  50,  50,
+  0,  0,  50,  50,  50,  50,
+  50,  0,  50,  50,  50,  50,
+  -50,  50,  50,  50,  50,  50,
+  0,  50,  50,  50,  50,  50,
+  50,  50,  50,  50,  50,  50
+};
+
+const struct lsp_codebook lsp_cbdt[] = {
+  /* codebook/lspdt1-4.txt */
+  {
+    4,
+    6.33985,
+    81,
+    codes0
+  },
+  /* codebook/lspdt5-10.txt */
+  {
+    6,
+    9.50978,
+    729,
+    codes1
+  },
+  { 0, 0, 0, 0 }
+};
diff --git a/codec2-dev/src/quantise.c b/codec2-dev/src/quantise.c
index f7b7c03e..e351b53d 100644
--- a/codec2-dev/src/quantise.c
+++ b/codec2-dev/src/quantise.c
@@ -360,7 +360,7 @@ void lspdt_quantise(float lsps[], float lsps_[], float lsps__prev[])
 	lsps_dt[i] = (4000/PI)*(lsps[i] - lsps__prev[i]);
 	//	printf("%f ", lsps_dt[i]);
     }
-    printf("\n");
+    //printf("\n");
     k = lsp_cbdt[0].k;
     m = lsp_cbdt[0].m;
     cb = lsp_cbdt[0].cb;
@@ -370,21 +370,19 @@ void lspdt_quantise(float lsps[], float lsps_[], float lsps__prev[])
 
     for(i=0; i<4; i++) {
  	lsps_[i] = lsps__prev[i] + (PI/4000.0)*cb[index*k + i];
-	lsps__prev[i] = lsps_[i];
     }
 
     k = lsp_cbdt[1].k;
     m = lsp_cbdt[1].m;
     cb = lsp_cbdt[1].cb;
     index = quantise(cb, &lsps_dt[4], wt, k, m, &se);
-    printf("index %d\n", index);
+    //printf("index %d\n", index);
     for(i=4; i<10; i++) {
-	printf("%f ", cb[index*k + i - 4]);
+	//printf("%f ", cb[index*k + i - 4]);
  	lsps_[i] = lsps__prev[i] + (PI/4000.0)*cb[index*k + i - 4];
-	lsps__prev[i] = lsps_[i];
     }
 
-    printf("\n");
+    //printf("\n");
 }
 
 void check_lsp_order(float lsp[], int lpc_order)
-- 
2.25.1