<s>
Daala	B-Application
is	O
a	O
video	B-Algorithm
coding	I-Algorithm
format	I-Algorithm
under	O
development	O
by	O
the	O
Xiph.Org	B-Application
Foundation	I-Application
under	O
the	O
lead	O
of	O
Timothy	O
B	O
.	O
Terriberry	O
mainly	O
sponsored	O
by	O
the	O
Mozilla	O
Corporation	O
.	O
</s>
<s>
Like	O
Theora	B-Algorithm
and	O
Opus	B-Algorithm
,	O
Daala	B-Application
is	O
available	O
free	O
of	O
any	O
royalties	O
and	O
its	O
reference	O
implementation	O
is	O
being	O
developed	O
as	O
free	B-License
and	I-License
open-source	I-License
software	I-License
.	O
</s>
<s>
The	O
name	O
is	O
taken	O
from	O
the	O
fictional	O
character	O
of	O
Admiral	O
Natasi	O
Daala	B-Application
from	O
the	O
Star	B-Application
Wars	I-Application
universe	O
.	O
</s>
<s>
The	O
reference	O
implementation	O
is	O
written	O
in	O
C	B-Language
and	O
published	O
,	O
together	O
with	O
its	O
source	O
code	O
,	O
as	O
free	B-Application
software	I-Application
under	O
the	O
terms	O
of	O
a	O
BSD-like	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
Software	O
patents	O
are	O
being	O
filed	O
for	O
techniques	O
used	O
in	O
and	O
developed	O
for	O
Daala	B-Application
.	O
</s>
<s>
Since	O
June	O
20	O
,	O
2013	O
,	O
the	O
development	O
is	O
accompanied	O
by	O
a	O
series	O
of	O
sporadically	O
published	O
posts	O
on	O
the	O
underlying	O
technology	O
on	O
the	O
website	O
of	O
the	O
Xiph.Org	B-Application
Foundation	I-Application
.	O
</s>
<s>
The	O
Daala	B-Application
project	O
is	O
one	O
of	O
the	O
collaborators	O
in	O
the	O
IETF	O
's	O
NETVC	B-Algorithm
project	O
.	O
</s>
<s>
Daala	B-Application
is	O
aimed	O
to	O
be	O
a	O
suitable	O
proposal	O
for	O
a	O
new	O
video	B-Algorithm
coding	I-Algorithm
standard	I-Algorithm
for	O
the	O
Internet	O
and	O
real-time	B-General_Concept
applications	I-General_Concept
.	O
</s>
<s>
Daala	B-Application
is	O
projected	O
to	O
eventually	O
perform	O
as	O
well	O
as	O
if	O
not	O
better	O
than	O
other	O
modern	O
formats	O
.	O
</s>
<s>
(	O
All	O
widely	O
adopted	O
designs	O
to	O
date	O
share	O
the	O
same	O
basic	O
design	O
that	O
dates	O
back	O
to	O
H.261	B-Algorithm
from	O
three	O
decades	O
ago	O
.	O
)	O
</s>
<s>
Daala	B-Application
is	O
intended	O
to	O
be	O
a	O
high-efficiency	B-Algorithm
video	I-Algorithm
coding	I-Algorithm
format	O
for	O
use	O
cases	O
similar	O
to	O
those	O
of	O
High	B-Algorithm
Efficiency	I-Algorithm
Video	I-Algorithm
Coding	I-Algorithm
(	O
HEVC	B-Algorithm
or	O
H.265	B-Algorithm
)	O
and	O
VP9	B-Algorithm
.	O
</s>
<s>
It	O
has	O
been	O
stated	O
that	O
the	O
performance	O
goal	O
is	O
to	O
be	O
a	O
generation	O
beyond	O
HEVC	B-Algorithm
and	O
VP9	B-Algorithm
.	O
</s>
<s>
As	O
a	O
basic	O
technology	O
Daala	B-Application
uses	O
an	O
unconventional	O
discrete	B-General_Concept
cosine	I-General_Concept
transform	I-General_Concept
with	O
overlapping	O
blocks	O
.	O
</s>
<s>
This	O
reduces	O
the	O
blocking	O
artifacts	O
characteristic	O
of	O
other	O
video	O
codecs	O
that	O
use	O
the	O
discrete	B-General_Concept
cosine	I-General_Concept
transform	I-General_Concept
(	O
DCT	B-General_Concept
)	O
directly	O
,	O
without	O
the	O
need	O
for	O
additional	B-General_Concept
filtering	I-General_Concept
against	I-General_Concept
blocking	I-General_Concept
artifacts	I-General_Concept
.	O
</s>
<s>
The	O
coefficients	O
are	O
coded	O
by	O
Perceptual	B-Algorithm
Vector	I-Algorithm
Quantisation	I-Algorithm
(	O
PVQ	O
,	O
a	O
spherical	O
vector	B-Algorithm
quantisation	I-Algorithm
)	O
,	O
which	O
models	O
human	O
perception	O
.	O
</s>
<s>
All	O
substreams	O
that	O
the	O
encoder	O
produces	O
are	O
coded	O
to	O
one	O
bitstream	O
by	O
a	O
range	B-Algorithm
encoder	I-Algorithm
.	O
</s>
<s>
Within	O
the	O
family	O
of	O
Xiph.Org	B-Application
multimedia	O
formats	O
,	O
Daala	B-Application
is	O
the	O
successor	O
to	O
Theora	B-Algorithm
from	O
2004	O
.	O
</s>
<s>
Problems	O
with	O
agreeing	O
on	O
video	O
formats	O
for	O
WebRTC	B-Protocol
and	O
successes	O
in	O
the	O
development	O
of	O
the	O
audio	O
coding	O
standard	O
Opus	B-Algorithm
are	O
being	O
cited	O
as	O
motivations	O
for	O
developing	O
a	O
video	B-Algorithm
coding	I-Algorithm
standard	I-Algorithm
.	O
</s>
<s>
Following	O
up	O
on	O
the	O
successful	O
standardisation	O
of	O
Opus	B-Algorithm
at	O
the	O
Internet	O
Engineering	O
Task	O
Force	O
(	O
IETF	O
)	O
,	O
it	O
was	O
planned	O
to	O
also	O
develop	O
a	O
worldwide	O
video	B-Algorithm
coding	I-Algorithm
standard	I-Algorithm
there	O
.	O
</s>
<s>
The	O
purpose	O
of	O
Daala	B-Application
is	O
to	O
provide	O
an	O
initial	O
proposal	O
for	O
the	O
development	O
of	O
that	O
standard	O
.	O
</s>
<s>
On	O
May	O
30	O
an	O
alpha	O
prototype	O
of	O
Daala	B-Application
was	O
used	O
to	O
stream	O
video	O
over	O
the	O
Internet	O
.	O
</s>
<s>
After	O
several	O
preliminary	O
meetings	O
,	O
a	O
respective	O
working	O
group	O
with	O
the	O
mission	O
to	O
develop	O
an	O
Internet	B-Algorithm
Video	I-Algorithm
Codec	I-Algorithm
(	O
NetVC	B-Algorithm
)	O
officially	O
commenced	O
activity	O
on	O
May	O
18	O
,	O
2015	O
.	O
</s>
<s>
Among	O
other	O
contributions	O
,	O
a	O
series	O
of	O
coding	O
techniques	O
from	O
Daala	B-Application
were	O
officially	O
proposed	O
to	O
the	O
group	O
.	O
</s>
<s>
On	O
September	O
1	O
,	O
2015	O
,	O
Mozilla	O
announced	O
that	O
the	O
Alliance	O
for	O
Open	O
Media	O
would	O
use	O
elements	O
of	O
Daala	B-Application
to	O
develop	O
a	O
royalty	O
free	O
video	O
format	O
,	O
AOMedia	B-Application
Video	I-Application
1	I-Application
.	O
</s>
<s>
On	O
March	O
24	O
,	O
2015	O
,	O
Daala	B-Application
was	O
presented	O
to	O
the	O
IETF	O
as	O
a	O
candidate	O
for	O
their	O
Internet	B-Algorithm
Video	I-Algorithm
Codec	I-Algorithm
(	O
NETVC	B-Algorithm
)	O
video	O
standard	O
.	O
</s>
<s>
Daala	B-Application
coding	O
techniques	O
have	O
been	O
proposed	O
to	O
the	O
IETF	O
for	O
inclusion	O
into	O
NETVC	B-Algorithm
.	O
</s>
