Professional Media Transport over Packetized Networks

Professional Media Transport over Packetized Networks

March 3, 2017

Sergio Ammirata, Ph.D Streaming high-quality video over packetized networks is a demanding endeavor and may suffer from packets being dropp

Streaming high quality video over packetized networks is a demanding endeavor and may suffer from packets being dropped, duplicated or corrupted for various reasons, negatively impacting the viewing experience.

The primary enabling technology is the Internet Protocol (IP). While very capable, IP alone is not suitable for real-time media transport since it is susceptible to jitter, packet loss, etc., unless complemented by a real-time recovery mechanism. One such mechanism is called ARQ: Automatic Repeat reQuest.

ARQ protocols aim to ensure delivery of all packets across a data link. Today's ARQ focus is low-latency packet recovery for real-time applications using UDP. We will describe how UDP in combination with Selective Repeat/Selective Reject ARQ enables reliable media transport over packetized networks. By utilizing variable and adaptive processing in response to actual network conditions, unlike TCP/IP's fixed overhead, the UDP-ARQ pair fulfills the exacting demands of real-time media transport over all kinds of IP networks.

Finally, we will illustrate how this technology can be utilized in a range of use cases to achieve error-free real-time media transport.

Professional Media Transport over Packetized Networks
Sergio Ammirata, Ph.D


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