<s>
Serial	B-Device
Data	I-Device
Transport	I-Device
Interface	I-Device
is	O
a	O
way	O
of	O
transmitting	O
data	O
packets	O
over	O
a	O
Serial	B-Protocol
Digital	I-Protocol
Interface	I-Protocol
datastream	O
.	O
</s>
<s>
This	O
means	O
that	O
standard	O
SDI	B-Protocol
infrastructure	O
can	O
be	O
used	O
.	O
</s>
<s>
Developed	O
to	O
address	O
the	O
needs	O
of	O
the	O
growing	O
number	O
of	O
compressed	O
video	O
standards	O
(	O
DV	O
,	O
DVCPRO	O
,	O
BetaSX	O
,	O
MPEG2	B-Algorithm
)	O
it	O
allows	O
lossless	O
transfer	O
of	O
data	O
to	O
other	O
devices	O
which	O
have	O
the	O
same	O
codec	O
,	O
for	O
example	O
DV	O
to	O
DV	O
or	O
SX	O
to	O
SX	O
.	O
</s>
<s>
Using	O
a	O
standard	O
SDI	B-Protocol
transport	O
,	O
the	O
extra	O
data	O
is	O
placed	O
within	O
normal	O
active	O
video	O
,	O
between	O
Start	O
of	O
Active	O
Video	O
(	O
SAV	O
)	O
,	O
and	O
End	O
of	O
Active	O
Video	O
(	O
EAV	O
)	O
.	O
</s>
<s>
If	O
an	O
SDTI	O
stream	O
is	O
viewed	O
using	O
a	O
standard	O
SDI	B-Protocol
device	O
,	O
then	O
the	O
raw	O
data	O
can	O
be	O
seen	O
as	O
a	O
small	O
strip	O
along	O
the	O
left	O
hand	O
side	O
(	O
usually	O
in	O
purple	O
)	O
.	O
</s>
<s>
A	O
1.5	O
GBit/s	O
version	O
,	O
using	O
the	O
high	B-Device
definition	I-Device
serial	B-Protocol
digital	I-Protocol
interface	I-Protocol
,	O
is	O
standardized	O
as	O
SMPTE	O
348M	O
.	O
</s>
