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Phil Hippensteel

Phil Hippensteel on IP Surveillance Video

In this fourth of our newsletters that have focused on the types of IP video, we will investigate surveillance video. Cameras that send and receive IIP packets and are used for surveillance, are called network cameras. I chose to have a separate discussion about these cameras because their video streams can take three forms:RTP over UDPRTP over RTSP (over TCP)RTP over RTSP over HTTPSurveillance......

Phil Hippensteel on IP Video Types and Networks – ABR

The video type we examine in this newsletter is distinct from the others we have studied. Adaptive bit rate (ABR) video is usually transported using TCP as the transport protocol. As we will see, this makes it operate very differently on an IP network than video conferencing, IPTV or video surveillance traffic. The fact that it uses TCP is unusual. For decades, conventional wisdom held that......

Phil Hippensteel on IP Video Types and Networks: IPTV

The last newsletter focused on video conferencing and how it operates on an IP network. Now our study will consider the forms of video that depend directly on IP and the MPEG transport stream format. This format was first used in enterprise and carrier networks to support what has been called IPTV. However, it now includes digital signage and some forms of streaming video. While I’ll call all......

Phil Hippensteel on IP Video Types and Networks: Videoconferencing

In our newsletters we’ve focused on the importance of the layer four protocols, TCP and UDP. This is important to understand so that now we can discuss how each of the major categories of IP video behaves on an IP network. In the next few newsletters we’ll look at each of the following video types: video conferencing, IPTV, adaptive bit rate video and surveillance video. IPTV will include other......

Phil Hippensteel on The Effect of Network Jitter

In previous newsletters, we talked about the effect that packet loss and network latency would have on IP video. In both cases, we found that any deterioration of the video depended on whether the transport protocol in use was TCP or UDP. Today, we will study network jitter and see what problems it might cause.First, we should clarify what the term network jitter means. Suppose a source sends......

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