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Phil Hippensteel

Phil Hippensteel on SRT v. ABR

In this second newsletter about Secure Reliable Transport (SRT), we’ll examine its impact on an IP network. Then, we’ll compare that to the behavior to the activity of adaptive bit rate (ABR), another video transport.First let’s recall the characteristics of SRT:negotiates a “session” in a manner similar to TCP.guarantees delivery of the packets.detects congestion in the network and adapts to......

Phil Hippenstteel on SRT

The next few newsletters will focus on the new transport protocol Secure, Reliable Transport (SRT). Introduced to the market by Wowza and Haivision, SRT has dozens of companies supporting it through their membership in the SRT Alliance. We’ll consider, at a fairly moderate technical level, how it works. Then we’ll compare it to other transport methods developed by the AV industry. Lastly, we’ll......

Phil Hippensteel on the Complexity of IP Networks

Recently, I was meeting with the AV staff of a local university. The objective of the conference was to introduce them to a new Ethernet based technology that is designed to carry video. I was providing a tutorial on its operation. During our exchange, I was pleased with their interest in the topic but surprised by some of their questions. They currently use an analog video distribution system......

Thoughts On AV Over IP

VIDEO AND IP TRANSPORT—NEW DIRECTIONS It has never been a trivial task to get video over IP networks. The need to move text data brought about IP networks. However, when voice was successfully and efficiently moved over these networks, engineers began to question whether video could also be transported on them. Video conferencing and IPTV were built on the concept that, if the network was not......

Phil Hippensteel on IP Video Performance

We often hear discussions about users’ quality of experience (QOE) relative to video. The term usually refers to subjective judgements about videos and audios that are played on a device. However, I believe that IT network administrators and AV professionals see the issue of video quality in different terms. Let’s explore this.The quality of the video that is played depends primarily on two......

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