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author | Ralph Giles <giles@mozilla.com> | 2014-01-18 03:44:08 +0400 |
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committer | Ralph Giles <giles@mozilla.com> | 2014-01-18 03:44:08 +0400 |
commit | 078775bee5683e3c0a74ab5b5313d11fa2ee0229 (patch) | |
tree | dd511a61e2ccf4d97e6f7dbe03276d8e86d4ba47 | |
parent | c42c6db46f79df5ea281c97ea3421740855fc964 (diff) |
Reference vorbis source code for lpc coefficient calculation.
-rw-r--r-- | doc/draft-ietf-codec-oggopus.xml | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/doc/draft-ietf-codec-oggopus.xml b/doc/draft-ietf-codec-oggopus.xml index ede5e86c..4ec082c4 100644 --- a/doc/draft-ietf-codec-oggopus.xml +++ b/doc/draft-ietf-codec-oggopus.xml @@ -1256,7 +1256,7 @@ This ensures that the encoded file has the same duration as the original, with <section anchor="lpc" title="LPC Extrapolation"> <t> The first step in LPC extrapolation is to compute linear prediction - coefficients. + coefficients. <xref target="lpc-sample"/> When extending the end of the signal, order-N (typically with N ranging from 8 to 40) LPC analysis is performed on a window near the end of the signal. The last N samples are used as memory to an infinite impulse response (IIR) @@ -1485,6 +1485,18 @@ The authors agree to grant third parties the irrevocable right to copy, use, </front> </reference> +<reference anchor="lpc-sample" + target="https://svn.xiph.org/trunk/vorbis/lib/lpc.c"> +<front> + <title>Autocorrelation LPC coeff generation algorithm + (vorbis source code)</title> +<author initials="J." surname="Degener" fullname="Jutta Degener"/> +<author initials="C." surname="Bormann" fullname="Carsten Bormann"/> +<date month="November" year="1994"/> +</front> +</reference> + + <reference anchor="replay-gain" target="http://wiki.xiph.org/VorbisComment#Replay_Gain"> <front> |