<s>
Helix	O
DNA	O
is	O
a	O
project	O
to	O
produce	O
computer	B-Application
software	I-Application
that	O
can	O
play	O
audio	O
and	O
video	O
media	O
in	O
various	O
formats	O
and	O
aid	O
in	O
producing	O
such	O
media	O
.	O
</s>
<s>
It	O
is	O
intended	O
as	O
a	O
largely	O
free	B-License
and	I-License
open-source	I-License
digital	B-Library
media	I-Library
framework	I-Library
that	O
runs	O
on	O
numerous	O
operating	B-General_Concept
systems	I-General_Concept
and	O
processors	O
(	O
including	O
mobile	O
phones	O
)	O
and	O
was	O
started	O
by	O
RealNetworks	O
which	O
contributed	O
much	O
of	O
the	O
code	O
.	O
</s>
<s>
Helix	B-Application
Player	I-Application
is	O
a	O
media	O
player	O
that	O
runs	O
on	O
Linux	B-Application
,	O
Solaris	B-Application
,	O
Symbian	B-Operating_System
and	O
FreeBSD	B-Operating_System
and	O
uses	O
the	O
Helix	O
DNA	O
Client	O
.	O
</s>
<s>
The	O
code	O
is	O
released	O
in	O
binary	O
and	O
source	O
code	O
form	O
under	O
various	O
licenses	O
,	O
notably	O
the	O
proprietary	B-Application
RealNetworks	B-License
Community	I-License
Source	I-License
License	I-License
and	O
the	O
free	B-License
and	I-License
open	I-License
source	I-License
software	I-License
RealNetworks	B-License
Public	I-License
Source	I-License
License	I-License
.	O
</s>
<s>
Additionally	O
,	O
the	O
Helix	O
DNA	O
Client	O
and	O
the	O
Helix	B-Application
Player	I-Application
are	O
licensed	O
under	O
the	O
popular	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
free	B-License
and	I-License
open	I-License
source	I-License
license	O
.	O
</s>
<s>
Use	O
of	O
the	O
RDT	B-Protocol
,	O
the	O
default	O
proprietary	B-Application
Real	B-Protocol
data	I-Protocol
transport	I-Protocol
,	O
and	O
of	O
the	O
RealVideo	B-Algorithm
and	O
RealAudio	B-Algorithm
codecs	B-General_Concept
requires	O
binary	O
components	O
distributed	O
under	O
the	O
Helix	O
DNA	O
Technology	O
Binary	O
Research	O
Use	O
License	O
.	O
</s>
<s>
Helix	O
DNA	O
Client	O
powers	O
many	O
digital	O
media	O
applications	O
,	O
including	O
RealPlayer	B-Application
for	O
MS	O
Windows	O
,	O
Mac	O
OS	O
and	O
Linux	B-Application
(	O
since	O
version	O
10	O
)	O
,	O
RealPlayer	B-Application
Mobile	O
,	O
and	O
Helix	B-Application
Player	I-Application
.	O
</s>
<s>
It	O
is	O
used	O
on	O
Nokia	O
,	O
Motorola	O
,	O
Samsung	B-Application
and	O
Sony	O
Ericsson	O
mobile	O
phones	O
.	O
</s>
<s>
It	O
is	O
also	O
being	O
used	O
in	O
embedded	O
devices	O
like	O
the	O
Internet	B-Operating_System
Tablet	I-Operating_System
OS	I-Operating_System
from	O
Nokia	O
,	O
which	O
is	O
found	O
on	O
the	O
Nokia	B-Application
770	I-Application
,	O
N800	B-Application
and	O
N810	B-Language
Internet	O
Tablets	O
.	O
</s>
<s>
Other	O
projects	O
that	O
use	O
the	O
Helix	O
framework	O
include	O
RealNetwork	O
's	O
Rhapsody	O
online	O
music	O
service	O
,	O
the	O
Banshee	B-Language
and	O
Amarok	B-Language
music	O
players	O
,	O
and	O
MediaReady	O
4000	O
.	O
</s>
<s>
Helix	O
DNA	O
also	O
manifests	O
itself	O
as	O
the	O
RealPlayer	B-Application
on	O
Mobile	O
Internet	O
Devices	O
(	O
MID	O
)	O
and	O
on	O
Netbooks	O
.	O
</s>
<s>
Helix	O
DNA	O
Client	O
for	O
Android	O
provides	O
an	O
HLS	B-Protocol
,	O
MPEG-DASH	B-Protocol
,	O
Verimatrix	O
DRM	O
and	O
Microsoft	O
PlayReady	O
DRM	O
media	O
player	O
for	O
Android	O
2.2	O
to	O
latest	O
devices	O
.	O
</s>
<s>
Supporting	O
H.264	B-Application
and	O
AAC	B-Application
codecs	B-General_Concept
with	O
Adaptive	O
Bit	O
Rate	O
support	O
(	O
H.264	B-Application
/	O
AAC	B-Application
)	O
including	O
audio	O
only	O
.	O
</s>
<s>
Armv7	O
and	O
Armv6	O
supported	O
using	O
Stagefright	O
media	B-Library
platform	I-Library
.	O
</s>
<s>
Helix	O
SDK	O
is	O
supplied	O
as	O
a	O
library	O
which	O
is	O
included	O
within	O
Android	O
Java	B-Language
applications	O
for	O
over	O
the	O
air	O
installation	O
.	O
</s>
<s>
It	O
supports	O
streaming	O
to	O
any	O
device	O
or	O
application	O
that	O
supports	O
HTTP	B-Protocol
,	O
RTSP/RTP	O
,	O
TCP	O
,	O
UDP	O
unicast	B-Protocol
and	O
UDP	O
multicast	O
streaming	O
protocols	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
commercial	B-Application
version	O
called	O
Helix	O
Server	O
,	O
which	O
has	O
more	O
features	O
and	O
supports	O
more	O
media	O
formats	O
.	O
</s>
<s>
It	O
is	O
available	O
for	O
Linux	B-Application
,	O
Solaris	B-Application
,	O
Symbian	B-Operating_System
and	O
FreeBSD	B-Operating_System
.	O
</s>
<s>
Users	O
of	O
Microsoft	O
Windows	O
and	O
Mac	O
OS	O
X	O
can	O
use	O
RealPlayer	B-Application
,	O
which	O
has	O
similar	O
capabilities	O
.	O
</s>
<s>
The	O
Helix	O
DNA	O
Producer	O
runs	O
on	O
MS	O
Windows	O
,	O
Linux	B-Application
and	O
Mac	O
OS	O
X	O
.	O
</s>
<s>
Developers	O
who	O
want	O
MP3	B-Application
encoding	O
can	O
license	O
the	O
code	O
from	O
RealNetworks	O
for	O
a	O
fee	O
.	O
</s>
<s>
There	O
is	O
also	O
an	O
add-on	O
package	O
for	O
Helix	O
DNA	O
Producer	O
SDK	O
with	O
AAC	B-Application
or	O
aacPlus	O
encoding	O
support	O
.	O
</s>
<s>
Helix	O
DNA	O
Producer	O
is	O
also	O
available	O
in	O
a	O
commercial	B-Application
,	O
closed-source	B-Application
version	O
RealProducer	O
Plus	O
for	O
MS	O
Windows	O
and	O
Linux	B-Application
.	O
</s>
