Extron electronics SMP 300 Series User Manual page 177

Transport Streams (TS) — A form of media wrapped in MPEG‑2 transport stream
headers. The MPEG‑2 transport headers contain information about the media.
The SMP is compatible with transport streams that contain H.264 encoded video and
AAC encoded audio. Transport streams containing MPEG‑2 video and AC3 audio are not
supported.
TS/UDP — (Unicast or multicast) An MPEG‑2 transport stream containing the
•
elementary streams for the audio and video. It is sent using UDP packets.
• TS/RTP — (Unicast or multicast) Transport stream that is sent using RTP/UDP. RTP
provides sequencing information; if the sequencing information is reordered by the
network, RTP reorganizes and processes the information in the correct order. UDP
would process the sequencing information out of order, making RTP performance better
on larger, many hop networks.
Unicast — Sending messages from one device to a single network destination on a
network. Having N clients of a unicast stream requires the server to produce N streams of
unicast data.
User Datagram Protocol (UDP) — A connectionless, transport layer protocol that sends
packets (datagrams) across networks using "best‑effort" delivery. It is a relatively simple
protocol that does not include handshaking.
Variable Bit Rate (VBR) — A compression scheme that adjusts the output bit rate around
a specified target bit rate depending on the audio or image complexity. More bandwidth is
used when the video frame is more complex and less bandwidth is used when the video
frame is simple.
SMP 300 Series • Glossary 169