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ietf draft update (Koen's comments)

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Jean-Marc Valin 2010-07-05 18:56:03 -04:00
parent 619d186f11
commit 79723bb367
1 changed files with 6 additions and 5 deletions
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11
doc/draft-valin-codec-prototype.xml
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@ -67,7 +67,7 @@ the speech low frequencies are usually more efficiently coded using
linear prediction codecs (such as CELP variants), while the higher frequencies linear prediction codecs (such as CELP variants), while the higher frequencies
are more efficiently coded in the transform domain (e.g. MDCT). For low are more efficiently coded in the transform domain (e.g. MDCT). For low
sampling rates, the MDCT layer is not useful and only the LP-based layer is sampling rates, the MDCT layer is not useful and only the LP-based layer is
used. On the other hand, non-speech signals are sometimes adequately coded used. On the other hand, non-speech signals are not always adequately coded
using linear prediction, so for music only the MDCT-based layer is used. using linear prediction, so for music only the MDCT-based layer is used.
</t> </t>
@ -98,8 +98,8 @@ it is easy to make the bit allocation of the CELT layer produce a final stream
that is CBR by using all the bits left unused by the SILK layer. that is CBR by using all the bits left unused by the SILK layer.
</t> </t>
<t>The implementation of SILK-based LP layer is as described in the <t>The implementation of SILK-based LP layer is similar to the description in
<xref target="SILK">SILK Internet-Draft</xref> with the main exception that the <xref target="SILK">SILK Internet-Draft</xref> with the main exception that
SILK was modified to SILK was modified to
use the same range coder as CELT. The implementation of the CELT-based MDCT use the same range coder as CELT. The implementation of the CELT-based MDCT
layer is available from the CELT website and is a more recent version (0.8.0) layer is available from the CELT website and is a more recent version (0.8.0)
@ -112,8 +112,9 @@ only the higher bands using a range coder partially filled by the SILK layer.</t
The source code is currently available in a The source code is currently available in a
<eref target='git://git.xiph.org/users/jm/ietfcodec.git'>Git repository</eref> <eref target='git://git.xiph.org/users/jm/ietfcodec.git'>Git repository</eref>
which references two other which references two other
repositories (for SILK and CELT). Some snapshots will be provided for repositories (for SILK and CELT). Some snapshots are provided for
convenience at <eref target='http://people.xiph.org/~jm/ietfcodec/'/>. convenience at <eref target='http://people.xiph.org/~jm/ietfcodec/'/> along
with sample files.
Although the build system is very primitive Although the build system is very primitive
(and inconsistent), some instructions are provided in the toplevel README file. (and inconsistent), some instructions are provided in the toplevel README file.
This is very early development so both the quality and feature set should This is very early development so both the quality and feature set should