ref: 2cb95f528582ed19a1acedbba6ca513649dd736c
parent: 1a113a148938459c1f6e1b8b89431c46be8eef1e
author: Jean-Marc Valin <[email protected]>
date: Tue May 15 06:49:41 EDT 2012
draft: reference for LSP stability
--- a/doc/draft-ietf-codec-opus.xml
+++ b/doc/draft-ietf-codec-opus.xml
@@ -2992,7 +2992,7 @@
However, nothing in either the reconstruction process or the
quantization process in the encoder thus far guarantees that the coefficients
are monotonically increasing and separated well enough to ensure a stable
- filter <xref target="line-spectral-pairs"/>.
+ filter <xref target="Kabal86"/>.
When using the reference encoder, roughly 2% of frames violate this constraint.
The next section describes a stabilization procedure used to make these
guarantees.
@@ -7713,6 +7713,17 @@
</front>
<seriesInfo name="IEEE Trans. on Information Theory, Vol. 32" value="pp. 568-583" />
</reference>
+
+<reference anchor="Kabal86">
+<front>
+<title>The Computation of Line Spectral Frequencies Using Chebyshev Polynomials</title>
+<author initials="P." surname="Kabal" fullname="P. Kabal"><organization/></author>
+<author initials="R." surname="Ramachandran" fullname="R. P. Ramachandran"><organization/></author>
+<date month="December" year="1986" />
+</front>
+<seriesInfo name="IEEE Trans. Acoustics, Speech, Signal Processing, vol. 34, no. 6" value="pp. 1419-1426" />
+</reference>
+
<reference anchor="Valgrind" target="http://valgrind.org/">
<front>