January 2016
Intermediate to advanced
384 pages
8h 6m
English
book
Building Telephony Systems with OpenSIPS - Second Edition
by Flavio E. Goncalves, Flavio E Goncalves, Bogdan-Andrei Iancu
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The RTP protocol
The Real-Time Protocol (RTP) is responsible for the real-time transport of data such as audio and video. It was standardized in RFC 3550. It uses UDP as the transport protocol. To be transported, the audio or video has to be packetized by a codec. Basically, the protocol allows the specification of the timing and content requirements of the media transmission for the incoming and outgoing packets using the following:
- The sequence number
- Timestamps
- Packet forward without retransmission
- Source identification
- Content identification
- Synchronism
Codecs
A codec is an algorithm capable of encoding or decoding a digital stream. The content described in the RTP protocol is usually encoded by a codec. Each codec has a specific use. Some have compression ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.