<s>
Radio	B-Device
Times	I-Device
Extra	I-Device
is	O
a	O
means	O
of	O
extending	O
advertising	O
into	O
the	O
medium	O
of	O
digital	O
programme	O
guides	O
provided	O
by	O
Inview	B-Device
Technology	I-Device
.	O
</s>
<s>
Radio	B-Device
Times	I-Device
Extra	I-Device
has	O
been	O
installed	O
on	O
certain	O
Freeview	B-Device
box	O
models	O
through	O
an	O
'	O
over-air	O
download	O
 '	O
,	O
but	O
some	O
makers	O
installing	O
the	O
service	O
on	O
new	O
boxes	O
that	O
can	O
be	O
bought	O
in	O
the	O
shops	O
.	O
</s>
<s>
As	O
of	O
January	O
2011	O
,	O
Radio	B-Device
Times	I-Device
Extra	I-Device
has	O
been	O
installed	O
on	O
3.8	O
million	O
Freeview	B-Device
set-top	O
boxes	O
in	O
the	O
United	O
Kingdom	O
from	O
21	O
different	O
manufacturers	O
spanning	O
37	O
receivers	O
.	O
</s>
<s>
The	O
service	O
was	O
originally	O
built	O
by	O
Teletext	O
Ltd	O
in	O
collaboration	O
with	O
Inview	B-Device
Technology	I-Device
.	O
</s>
<s>
In	O
a	O
deal	O
between	O
BBC	O
Worldwide	O
and	O
Inview	B-Device
Technology	I-Device
,	O
Teletext	B-Device
Extra	I-Device
was	O
relaunched	O
as	O
Radio	B-Device
Times	I-Device
Extra	I-Device
on	O
31	O
January	O
2011	O
,	O
with	O
editorial	O
content	O
from	O
the	O
Radio	O
Times	O
.	O
</s>
<s>
Radio	B-Device
Times	I-Device
Extra	I-Device
provides	O
users	O
with	O
an	O
Electronic	B-Device
Programme	I-Device
Guide	I-Device
(	O
EPG	B-Device
)	O
carrying	O
14	O
days	O
of	O
television	O
listings	O
including	O
programme	O
information	O
.	O
</s>
<s>
You	O
can	O
access	O
the	O
EPG	B-Device
from	O
any	O
Freeview	B-Device
channel	O
by	O
going	O
to	O
your	O
digital	O
remote	B-Protocol
control	I-Protocol
and	O
pressing	O
the	O
'	O
TV	O
Guide	O
 '	O
button	O
,	O
when	O
using	O
a	O
Radio	O
Times	O
Extra-compatible	O
Freeview	B-Device
receiver	O
.	O
</s>
<s>
A	O
small	O
window	O
on	O
the	O
EPG	B-Device
continues	O
to	O
display	O
video	O
from	O
the	O
channel	O
you	O
were	O
on	O
.	O
</s>
<s>
If	O
you	O
press	O
the	O
'	O
Text	O
 '	O
button	O
on	O
your	O
digital	O
remote	O
while	O
viewing	O
the	O
EPG	B-Device
,	O
you	O
are	O
taken	O
to	O
a	O
digital	O
teletext	O
service	O
with	O
information	O
such	O
as	O
news	O
,	O
sport	O
,	O
racing	O
,	O
travel	O
,	O
weather	O
,	O
entertainment	O
and	O
holidays	O
.	O
</s>
<s>
Teletext	B-Device
Extra	I-Device
had	O
more	O
content	O
than	O
Teletext	O
Ltd	O
's	O
digital	O
services	O
on	O
ITV	O
and	O
Channel	O
4	O
and	O
carried	O
high-resolution	B-Algorithm
images	I-Algorithm
with	O
top	O
stories	O
.	O
</s>
<s>
From	O
the	O
set-top	O
box	O
owners	O
viewpoint	O
therefore	O
Radio	B-Device
Times	I-Device
Extra	I-Device
has	O
similar	O
characteristics	O
to	O
unwanted	O
spam	O
and	O
computer	O
viruses	O
.	O
</s>
