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Tim-Philipp Müller
Opus
Commits
c7207386
Commit
c7207386
authored
Sep 10, 2010
by
Jean-Marc Valin
Browse files
Adopted as WG item
parent
682d2900
Changes
1
Hide whitespace changes
Inline
Side-by-side
doc/draft-
valin
-codec-
prototype
.xml
→
doc/draft-
ietf
-codec-
description
.xml
View file @
c7207386
...
...
@@ -2,10 +2,10 @@
<!DOCTYPE rfc SYSTEM 'rfc2629.dtd'>
<?rfc toc="yes" symrefs="yes" ?>
<rfc
ipr=
"trust200902"
category=
"std"
docName=
"draft-
valin
-codec-
prototype
-0
1
"
>
<rfc
ipr=
"trust200902"
category=
"std"
docName=
"draft-
ietf
-codec-
description
-0
0
"
>
<front>
<title
abbrev=
"
Codec Prototype"
>
Prototype for
IETF Interactive Audio Codec
</title>
<title
abbrev=
"
Interactive Audio Codec"
>
Definition of the
IETF Interactive Audio Codec
</title>
<author
initials=
"JM"
surname=
"Valin"
fullname=
"Jean-Marc Valin"
>
...
...
@@ -39,7 +39,7 @@
</author>
<date
day=
"
8
"
month=
"
July
"
year=
"2010"
/>
<date
day=
"
10
"
month=
"
September
"
year=
"2010"
/>
<area>
General
</area>
...
...
@@ -47,12 +47,8 @@
<abstract>
<t>
This document provides a quick overview of a prototype codec combining a linear
prediction layer (SILK) with an MDCT-based layer (CELT).
These codecs are
used because of the authors' familiarity with the source code, but it does
not prevent inclusion of code from other codecs as well. This is a
work in progress.
This document describes a codec designed for interactive speech and audio
transmission over the Internet.
</t>
</abstract>
</front>
...
...
@@ -76,9 +72,7 @@ In this proposed prototype, the LP layer is based on the
<eref
target=
'http://developer.skype.com/silk'
>
SILK
</eref>
codec
<xref
target=
"SILK"
></xref>
and the MDCT layer is based on the
<eref
target=
'http://www.celt-codec.org/'
>
CELT
</eref>
codec
<xref
target=
"CELT"
></xref>
. These codecs are
used because of the authors' familiarity with the source code, but it does
not prevent inclusion of code from other codecs in the future.
<xref
target=
"CELT"
></xref>
.
</t>
<t>
This is a work in progress.
</t>
...
...
@@ -155,9 +149,9 @@ header.
<t>
The LP mode supports the following configurations (numbered from 00000...01011 in binary):
<list
style=
"symbols"
>
<t>
16
kHz: 10, 20, 40, 60 ms (00000...00011)
</t>
<t>
8
kHz:
10, 20, 40, 60 ms (00000...00011)
</t>
<t>
12 kHz: 10, 20, 40, 60 ms (00100...00111)
</t>
<t>
8
kHz:
10, 20, 40, 60 ms (01000...01011)
</t>
<t>
16
kHz: 10, 20, 40, 60 ms (01000...01011)
</t>
</list>
for a total of 12 configurations.
</t>
...
...
@@ -165,8 +159,8 @@ for a total of 12 configurations.
<t>
The hybrid mode supports the following configurations (numbered from 01100...01111):
<list
style=
"symbols"
>
<t>
48
kHz: 10, 20 ms (01100...01101)
</t>
<t>
32
kHz: 10, 20 ms (01110...01111)
</t>
<t>
32
kHz: 10, 20 ms (01100...01101)
</t>
<t>
48
kHz: 10, 20 ms (01110...01111)
</t>
</list>
for a total of 4 configurations.
</t>
...
...
@@ -174,10 +168,10 @@ for a total of 4 configurations.
<t>
The MDCT-only mode supports the following configurations (numbered from 10000...11101):
<list
style=
"symbols"
>
<t>
4
8 kHz: 2.5, 5, 10, 20 ms (10000...10011)
</t>
<t>
32
kHz: 2.5, 5, 10, 20 ms (10100...10111)
</t>
<t>
16
kHz: 2.5, 5, 10, 20 ms (11000...11011)
</t>
<t>
8 kHz:
2.5, 5, 10, 20 ms (11100...11111)
</t>
<t>
8 kHz:
2.5, 5, 10, 20 ms (10000...10011)
</t>
<t>
16
kHz: 2.5, 5, 10, 20 ms (10100...10111)
</t>
<t>
32
kHz: 2.5, 5, 10, 20 ms (11000...11011)
</t>
<t>
4
8 kHz: 2.5, 5, 10, 20 ms (11100...11111)
</t>
</list>
for a total of 16 configurations.
</t>
...
...
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