<s>
OptimFROG	B-Algorithm
is	O
a	O
proprietary	B-Application
lossless	B-Algorithm
audio	O
data	B-General_Concept
compression	I-General_Concept
codec	B-General_Concept
developed	O
by	O
Florin	O
Ghido	O
.	O
</s>
<s>
OptimFROG	B-Algorithm
is	O
optimized	O
for	O
very	O
high	O
compression	O
(	O
small	O
file	O
sizes	O
)	O
at	O
the	O
expense	O
of	O
encoding	O
and	O
decoding	O
speed	O
,	O
and	O
consistently	O
measures	O
among	O
the	O
highest	O
compressing	O
lossless	B-Algorithm
codecs	I-Algorithm
.	O
</s>
<s>
OptimFROG	B-Algorithm
comes	O
with	O
three	O
compressors	O
:	O
one	O
lossless	B-Algorithm
codec	I-Algorithm
for	O
integer	O
LPCM	B-Algorithm
format	O
WAVE	O
files	O
,	O
one	O
for	O
IEEE_754	O
floating-point	O
WAVE	O
files	O
,	O
and	O
a	O
DualStream	O
format	O
with	O
a	O
lossy	B-Algorithm
part	O
and	O
a	O
correction	O
file	O
for	O
losslessness	O
.	O
</s>
<s>
OptimFROG	B-Algorithm
DualStream	O
is	O
a	O
lossy	B-Algorithm
codec	B-General_Concept
,	O
aimed	O
to	O
fill	O
the	O
gap	O
between	O
perceptual	O
coding	O
and	O
lossless	B-Algorithm
coding	O
as	O
OptimFROG	B-Algorithm
DualStream	O
has	O
an	O
option	O
to	O
produce	O
a	O
correction	O
file	O
.	O
</s>
<s>
This	O
file	O
can	O
be	O
used	O
,	O
in	O
combination	O
with	O
the	O
main	O
lossy-encoded	O
file	O
,	O
for	O
lossless	B-Algorithm
decoding	O
,	O
but	O
not	O
,	O
unlike	O
Wavpack	B-Application
hybrid	O
for	O
instance	O
,	O
for	O
playback	O
.	O
</s>
<s>
The	O
OptimFROG	B-Algorithm
file	O
formats	O
use	O
APEv2	O
tags	O
to	O
store	O
the	O
metadata	O
.	O
</s>
