Mpeg-4 Protocols And Communication Methods; Axis Media Control - Axis 213 PTZ User Manual

Notes:
•MPEG-4 is licensed technology. The AXIS 213 includes one viewing client license. Install-
ing additional unlicensed copies of the viewing client is prohibited. To purchase additional
licenses, contact your Axis reseller.
•All clients viewing the MPEG-4 stream must use the same image settings.

MPEG-4 protocols and communication methods

To deliver live streaming video over IP networks, various combinations of transport
protocols and broadcast methods are employed.
• RTP (Realtime Transport Protocol) is a protocol that allows programs to manage
the real-time transmission of multimedia data, via unicast or multicast.
• RTSP (Real Time Streaming Protocol) serves as a control protocol, to negotiate
which transport protocol to use for the stream. RTSP is thus used by a viewing cli-
ent to start a unicast session, see below.
• UDP (User Datagram Protocol) is a communications protocol that offers limited
service for exchanging data in a network that uses the Internet Protocol (IP). UDP
is an alternative to the Transmission Control Protocol (TCP). The advantage of UDP
is that it is not required to deliver all data and may drop network packets when
there is e.g. network congestion. This is suitable for live video, as there is no point
in re-transmitting old information that will not be displayed anyway.
• Unicasting is communication between a single sender and a single receiver over a
network. This means that the video stream goes independently to each user, and
each user gets their own stream. A benefit of unicasting is that if one stream fails,
it only affects one user.
• Multicast is bandwidth-conserving technology that reduces bandwidth usage by
simultaneously delivering a single stream of information to multiple network
users. This technology is used primarily on delimited networks (intranets), as each
user needs an uninterrupted data flow and should not rely on network routers.

AXIS Media Control

The recommended method of accessing live video (MPEG-4 and/or Motion JPEG) and
audio from the AXIS 213 is to use the AXIS Media Control (AMC) in Microsoft
Internet Explorer for Windows. This ActiveX component is automatically installed on
first use, after which it can be configured by opening the AMC Control Panel applet
from the Windows Control Panel. Alternatively, right-click the video image in
Internet Explorer.
AXIS 213 - Video and Audio Streams
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