<s>
Spectral	B-Algorithm
band	I-Algorithm
replication	I-Algorithm
(	O
SBR	O
)	O
is	O
a	O
technology	O
to	O
enhance	O
audio	O
or	O
speech	B-Application
codecs	I-Application
,	O
especially	O
at	O
low	O
bit	O
rates	O
and	O
is	O
based	O
on	O
harmonic	O
redundancy	O
in	O
the	O
frequency	O
domain	O
.	O
</s>
<s>
The	O
SBR	O
idea	O
is	O
based	O
on	O
the	O
principle	O
that	O
the	O
psychoacoustic	O
part	O
of	O
the	O
human	O
brain	O
tends	O
to	O
analyse	O
higher	O
frequencies	O
with	O
less	O
accuracy	O
;	O
thus	O
harmonic	O
phenomena	O
associated	O
with	O
the	O
spectral	B-Algorithm
band	I-Algorithm
replication	I-Algorithm
process	O
needs	O
only	O
be	O
accurate	O
in	O
a	O
perceptual	O
sense	O
and	O
not	O
technically	O
or	O
mathematically	O
exact	O
.	O
</s>
<s>
This	O
codec	O
was	O
submitted	O
to	O
MPEG	O
and	O
formed	O
the	O
basis	O
of	O
MPEG-4	O
High-Efficiency	O
AAC	B-Application
(	O
HE-AAC	O
)	O
,	O
standardized	O
in	O
2003	O
.	O
</s>
<s>
Lars	O
Liljeryd	O
,	O
Kristofer	O
Kjörling	O
,	O
and	O
Martin	O
Dietz	O
received	O
the	O
IEEE	O
Masaru	O
Ibuka	O
Consumer	O
Electronics	O
Award	O
in	O
2013	O
for	O
their	O
work	O
developing	O
and	O
marketing	O
HE-AAC	O
.	O
</s>
<s>
Coding	O
Technologies	O
 '	O
SBR	O
method	O
has	O
also	O
been	O
used	O
with	O
WMA	B-Application
10	O
Professional	O
to	O
create	O
WMA	B-Application
10	O
Pro	O
LBR	O
,	O
and	O
with	O
MP3	B-Application
to	O
create	O
mp3PRO	B-Algorithm
.	O
</s>
<s>
HE-AAC	O
which	O
uses	O
SBR	O
is	O
used	O
in	O
broadcast	O
systems	O
like	O
DAB+	O
,	O
Digital	O
Radio	O
Mondiale	O
(	O
including	O
xHE-AAC	O
)	O
,	O
HD	O
Radio	O
,	O
and	O
XM	O
Satellite	O
Radio	O
.	O
</s>
<s>
This	O
is	O
,	O
for	O
example	O
,	O
the	O
case	O
if	O
an	O
mp3PRO	B-Algorithm
file	O
is	O
played	O
back	O
with	O
MP3	B-Application
software	O
incapable	O
of	O
utilizing	O
the	O
SBR	O
information	O
.	O
</s>
