<s>
JBIG	B-Application
is	O
an	O
early	O
lossless	B-Algorithm
image	B-General_Concept
compression	I-General_Concept
standard	O
from	O
the	O
Joint	O
Bi-level	B-Algorithm
Image	I-Algorithm
Experts	O
Group	O
,	O
standardized	O
as	O
ISO/IEC	O
standard	O
11544	O
and	O
as	O
ITU-T	O
recommendation	O
T.82	B-Application
in	O
March	O
1993	O
.	O
</s>
<s>
Now	O
that	O
the	O
newer	O
bi-level	B-Algorithm
image	I-Algorithm
compression	O
standard	O
JBIG2	B-Algorithm
has	O
been	O
released	O
,	O
JBIG	B-Application
is	O
also	O
known	O
as	O
JBIG1	B-Application
.	O
</s>
<s>
JBIG	B-Application
was	O
designed	O
for	O
compression	O
of	O
binary	B-Algorithm
images	I-Algorithm
,	O
particularly	O
for	O
faxes	O
,	O
but	O
can	O
also	O
be	O
used	O
on	O
other	O
images	O
.	O
</s>
<s>
In	O
most	O
situations	O
JBIG	B-Application
offers	O
between	O
a	O
20%	O
and	O
50%	O
increase	O
in	O
compression	O
efficiency	O
over	O
Fax	O
Group	O
4	O
compression	O
,	O
and	O
in	O
some	O
situations	O
,	O
it	O
offers	O
a	O
30-fold	O
improvement	O
.	O
</s>
<s>
JBIG	B-Application
is	O
based	O
on	O
a	O
form	O
of	O
arithmetic	B-Algorithm
coding	I-Algorithm
developed	O
by	O
IBM	O
(	O
known	O
as	O
the	O
Q-coder	O
)	O
that	O
also	O
uses	O
a	O
relatively	O
minor	O
refinement	O
developed	O
by	O
Mitsubishi	O
,	O
resulting	O
in	O
what	O
became	O
known	O
as	O
the	O
QM-coder	O
.	O
</s>
<s>
JBIG	B-Application
also	O
supports	O
progressive	O
transmission	O
,	O
which	O
generally	O
incurs	O
a	O
small	O
overhead	O
in	O
bit	O
rate	O
(	O
around	O
5%	O
)	O
.	O
</s>
<s>
Doubts	O
about	O
patent	O
licence	O
requirements	O
for	O
JBIG1	B-Application
implementations	O
by	O
IBM	O
,	O
Mitsubishi	O
and	O
AT&T	O
prevented	O
the	O
codec	O
from	O
being	O
widely	O
implemented	O
in	O
open-source	O
software	O
.	O
</s>
<s>
Since	O
2012	O
,	O
there	O
are	O
now	O
no	O
more	O
JBIG1	B-Application
patents	O
in	O
force	O
–	O
the	O
last	O
ones	O
to	O
expire	O
were	O
Mitsubishi	O
's	O
patents	O
in	O
Canada	O
and	O
Australia	O
(	O
on	O
25	O
February	O
2011	O
)	O
and	O
in	O
the	O
United	O
States	O
(	O
on	O
4	O
April	O
2012	O
)	O
.	O
</s>
