<s>
The	O
cook	B-Algorithm
codec	I-Algorithm
is	O
a	O
lossy	B-Algorithm
audio	O
compression	O
codec	B-General_Concept
developed	O
by	O
RealNetworks	O
.	O
</s>
<s>
It	O
is	O
also	O
known	O
as	O
Cooker	O
,	O
Gecko	O
,	O
RealAudio	B-Algorithm
G2	O
,	O
and	O
RealAudio	B-Algorithm
8	O
low	O
bitrate	O
(	O
RA8LBR	O
)	O
.	O
</s>
<s>
Introduced	O
in	O
1998	O
,	O
the	O
cook	B-Algorithm
codec	I-Algorithm
was	O
the	O
first	O
audio	O
codec	B-General_Concept
developed	O
by	O
RealNetworks	O
in-house	O
,	O
and	O
was	O
named	O
after	O
its	O
author	O
,	O
Ken	O
Cooke	O
.	O
</s>
<s>
It	O
is	O
a	O
pure	O
transform	O
codec	B-General_Concept
based	O
on	O
the	O
modified	O
discrete	O
cosine	O
transform	O
with	O
a	O
single	O
block	O
size	O
.	O
</s>
<s>
In	O
2003	O
,	O
RealNetworks	O
introduced	O
a	O
surround	O
sound	O
version	O
of	O
cook	O
,	O
called	O
RealAudio	B-Algorithm
Multichannel	O
.	O
</s>
<s>
Although	O
RealNetworks	O
never	O
published	O
a	O
technical	O
description	O
of	O
the	O
cook	B-Algorithm
codec	I-Algorithm
,	O
others	O
have	O
reverse	O
engineered	O
the	O
format	O
,	O
and	O
as	O
of	O
December	O
2005	O
,	O
FFmpeg	B-Library
libavcodec	B-Language
contains	O
a	O
decoder	O
capable	O
of	O
playing	O
cook-encoded	O
files	O
.	O
</s>
<s>
As	O
of	O
July	O
2009	O
,	O
Rockbox	B-Application
is	O
capable	O
of	O
playing	O
cook-encoded	O
files	O
as	O
well	O
.	O
</s>
