![]() Below is a comparison of a single connection using HDMI over IP versus a single HDMI over point to point Baluns. First of all the Gigabit network uses either fiber or CAT6/7 – not CAT5e as in a regular network, so the cables in the wall must change. So let’s find out if we can simply “jump” onto an existing network to distribute HDMI over IP. The compression ratio will be higher if 100 Mbps IP network is used. The HDMI signal has to be compressed before being added to the TCP/IP stream and then expanded at the delivery point. ![]() For high quality video IP has to be a Gigabit speed network, not the usual 100 Mbps.Here are some of the requirements for HDMI over IP system: The HDMI signal, with its 12 bit Deep Color and 1080p/60 resolution has a data rate of over 6.69 Gbps. In addition a TCP/IP network has two flavors: a standard network with data transfer capacity up to 100 Mbps and the so called “Gigabit” network with data transfer capacity up to 1 Gbps. However, in the point to point connection HDMI over IP could connect directly without the hub as shown in Picture 2. TCP/IP wiring however, is always going to or from a central location such as a hub in a star-like distribution structure as shown in Picture 4. It certainly sounds appealing to be able to just “borrow” the same already installed CAT5/6 wire used for most TCP/IP installations. The basic reason for using HDMI over IP is to utilize the same CAT5/6 wiring that is already in place for standard IP Networks such as Ethernet. Since HDMI over dedicated CAT6 wires is always uncompressed we will discuss HDMI over IP only form the point of lowest possible compression ratio and highest video quality. The aim is to compare HDMI over IP connectivity to HDMI over dedicated CAT6 wires. Although TCP/IP networks are typically used for applications such as Data, Voice, and some low quality video, using TCP/IP for high quality HDMI video connectivity has some potential drawbacks which we will outline in this paper. ![]()
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