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33
The transfer format defines the RTP payload to be transported.
RTP/H264
The video data is packetized by the Real-Time Transport Protocol (
RTP
) for a
H.264
Video Elementary Stream.
Audio data is
not
transferred.
The data must be encoded to H.264 format.
The packaging is based on the following standards:
RFC3550 - RTP: A Transport Protocol for Real-Time Applications
RFC3551 - RTP Profile for Audio and Video Conferences with Minimal Control
RFC3984 - RTP Payload Format for H.264 Video
RTP/MJPEG
The video data is packetized by the Real-Time Transport Protocol (
RTP
) for a
MJPEG
Video Stream.
Audio data is
not
transferred.
The data must be encoded in MJPEG format.
The packaging is based on the following standards:
RFC3550 - RTP: A Transport Protocol for Real-Time Applications
RFC3551 - RTP Profile for Audio and Video Conferences with Minimal Control
RFC2435 - RTP Payload Format for JPEG-compressed Video
7.3.1.2
Transfer Method
The transfer method defines the data distribution throughout the network.
Multicast
The data packets are provided with the specified IP multicast address and port number
and transferred to a group of receivers (clients) via a point-to-multipoint connection.
The packets have to be transferred only once; the distribution is done by especially con-
figured routers (capable of IP multicasting).
A receiver will only receive data packets if it has (already) joined the IP multicast group
and if the appropriate application service is available at the specified port number.
IP multicast uses the address range between
224.0.0.0
and
239.255.255.255
(Class D).
Note that certain IP multicast address ranges are reserved for special purposes.
For intranet applications, the use of addresses ranging from 239.0.0.0 to 239.255.255.255
is recommended.
Unicast
The data packets are provided with the specified destination IP address and port number
and transferred to exactly one receiver (client) in the network via a point-to-point connec
-
tion.
The receiver will only receive the data packets if the appropriate application service is
available at the specified port number.
