<s>
The	O
opto-electronic	B-Algorithm
transfer	I-Algorithm
function	I-Algorithm
(	O
OETF	O
)	O
is	O
the	O
transfer	O
function	O
having	O
the	O
scene	O
light	O
as	O
input	O
and	O
converting	O
into	O
the	O
picture	O
or	O
video	O
signal	O
as	O
output	O
.	O
</s>
<s>
The	O
electro-optical	B-Algorithm
transfer	I-Algorithm
function	I-Algorithm
(	O
EOTF	B-Algorithm
)	O
is	O
the	O
transfer	O
function	O
having	O
the	O
picture	O
or	O
video	O
signal	O
as	O
input	O
and	O
converting	O
it	O
into	O
the	O
linear	O
light	O
output	O
of	O
the	O
display	O
.	O
</s>
<s>
The	O
opto-optical	B-Algorithm
transfer	I-Algorithm
function	I-Algorithm
(	O
OOTF	B-Algorithm
)	O
is	O
the	O
transfer	O
function	O
having	O
the	O
scene	O
light	O
as	O
input	O
and	O
the	O
displayed	O
light	O
as	O
output	O
.	O
</s>
<s>
The	O
OOTF	B-Algorithm
is	O
the	O
result	O
of	O
the	O
OETF	O
and	O
the	O
EOTF	B-Algorithm
and	O
is	O
usually	O
non-linear	O
.	O
</s>
<s>
Some	O
OETF	O
and	O
EOTF	B-Algorithm
have	O
an	O
initial	O
linear	O
portion	O
followed	O
by	O
a	O
non-linear	O
part	O
(	O
e.g.	O
</s>
<s>
sRGB	O
and	O
Rec.709	B-Device
)	O
.	O
</s>
<s>
2020	O
:	O
The	O
ITU-R	O
recommendations	O
BT.601	O
,	O
BT.709	B-Device
and	O
BT.2020	O
describe	O
the	O
reference	O
OETF	O
of	O
respectively	O
SD-TV	B-Device
,	O
HD-TV	B-Device
and	O
UHD-TV	B-Device
.	O
</s>
<s>
They	O
are	O
identical	O
OETF	O
based	O
on	O
a	O
gamma	O
curve	O
and	O
used	O
for	O
SDR-TV	B-Device
.	O
</s>
<s>
BT.1886	B-Algorithm
:	O
The	O
ITU-R	O
Recommendation	O
BT.1886	B-Algorithm
is	O
the	O
reference	O
EOTF	B-Algorithm
of	O
Standard	B-Device
Dynamic	I-Device
Range	I-Device
TV	O
(	O
SDR	B-Device
)	O
.	O
</s>
<s>
These	O
transfer	O
functions	O
have	O
been	O
developed	O
to	O
allow	O
HDR	B-Application
display	I-Application
:	O
</s>
<s>
Perceptual	B-Algorithm
quantizer	I-Algorithm
:	O
PQ	B-Algorithm
is	O
a	O
transfer	O
function	O
developed	O
by	O
Dolby	O
for	O
HDR	B-Application
and	O
allowing	O
a	O
luminance	O
level	O
of	O
up	O
to	O
10,000	O
cd/m2	O
.	O
</s>
<s>
2100	O
and	O
also	O
as	O
SMPTE	B-Algorithm
ST	I-Algorithm
2084	I-Algorithm
.	O
</s>
<s>
Hybrid	O
log	O
–	O
gamma	O
:	O
HLG	O
is	O
a	O
transfer	O
function	O
developed	O
by	O
NHK	O
and	O
BBC	O
for	O
HDR	B-Application
and	O
offering	O
some	O
backward	B-General_Concept
compatibility	I-General_Concept
on	O
SDR	B-Device
displays	O
.	O
</s>
