<s>
Lossless	B-Algorithm
predictive	I-Algorithm
audio	I-Algorithm
compression	I-Algorithm
(	O
LPAC	O
)	O
is	O
an	O
improved	O
lossless	B-Algorithm
audio	O
compression	O
algorithm	O
developed	O
by	O
Tilman	O
Liebchen	O
,	O
Marcus	O
Purat	O
and	O
Peter	O
Noll	O
at	O
,	O
Technical	O
University	O
Berlin	O
(	O
TU	O
Berlin	O
)	O
,	O
to	O
compress	O
PCM	O
audio	O
in	O
a	O
lossless	B-Algorithm
manner	O
,	O
unlike	O
conventional	O
audio	O
compression	O
algorithms	O
which	O
are	O
lossy	B-Algorithm
.	O
</s>
<s>
Meanwhile	O
,	O
it	O
is	O
no	O
longer	O
developed	O
because	O
an	O
advanced	O
version	O
of	O
it	O
has	O
become	O
an	O
official	O
standard	O
under	O
the	O
name	O
of	O
MPEG-4	O
Audio	B-Algorithm
Lossless	I-Algorithm
Coding	I-Algorithm
.	O
</s>
