From: drowe67 <drowe67@01035d8c-6547-0410-b346-abe4f91aad63>
Date: Thu, 1 Mar 2012 20:21:50 +0000 (+0000)
Subject: at JVMs suggestion did BWE after energy calculation, that fixed problem
X-Git-Url: http://git.whiteaudio.com/gitweb/?a=commitdiff_plain;h=60decf5aa97c266c27944c28ab2030bf6961ee16;p=freetel-svn-tracking.git

at JVMs suggestion did BWE after energy calculation, that fixed problem

git-svn-id: https://svn.code.sf.net/p/freetel/code@337 01035d8c-6547-0410-b346-abe4f91aad63
---

diff --git a/codec2-dev/src/quantise.c b/codec2-dev/src/quantise.c
index d18a3e3a..4c031100 100644
--- a/codec2-dev/src/quantise.c
+++ b/codec2-dev/src/quantise.c
@@ -863,6 +863,14 @@ float speech_to_uq_lsps(float lsp[],
     for(i=0; i<=order; i++)
 	E += ak[i]*R[i];
  
+    /* 15 Hz BW expansion as I can't hear the difference and it may help
+       help occasional fails in the LSP root finding.  Important to do this
+       after energy caluclation to avoid -ve energy values.
+    */
+
+    for(i=0; i<=order; i++)
+	ak[i] *= pow(0.994,(float)i);
+
     roots = lpc_to_lsp(ak, order, lsp, 5, LSP_DELTA1);
     if (roots != order) {
 	/* use some benign LSP values we can use instead */