Etekcity Hdmi Extender Extension Adapter via Cat5 / 6 - Technical Description

Rationale:
The HDMI signal is converted to Ethernet frames (yes, real network packets) and can also be transmitted over Ethernet networks. That is, you can plug the device also to a switch. The receiver converts the packets back to HDMI.
Implemented the whole thing is over UDP or Ethernet broadcast what ultimately course zumüllt the entire network.
Each participant will receive the packages. Without additional measures, the course is not to be used as the network.
But at least you can order virtually split the signal to the switch and distribute to multiple recipients.

Interestingly, I have not managed to watch it the actual image stream in Wireshark. But for a sent every second UDP packet to port 48689 from the TX module to broadcast, from the RX module in response directly to the TX module. Subsequently, the factory-assigned IP addresses:
TX 192.168.168.55 -> 255.255.255.255:48689
RX 192.168.168.56 -> 192.168.168.55:48689
Since it also comes top with an HTML browser and can if necessary. adjust the IP addresses and load theoretically new firmware on it (I have not tested all). The manufacturer I could not figure out (any Made in Taiwan or so). Is therefore also difficult ever to get firmware updates.

Of course, the tech-savvy users wonders with which delay times (delay) this whole transformation happens - and I can say with considerable! With an Ethernet cable length 1m I measured the following:
1920x1080p 176ms
1280x720p 132ms
(: Let stopwatch running on direct attached screen and test monitor, make both photo and compare Displaying timing Note)
The device is therefore only for use when the sound is transmitted with HDMI and otherwise in the room there are no other parallel transmission paths - otherwise you see on the various screens, the delay or offset hears the tone.

Furthermore, the image in M-JPEG is compressed. In any case comes in Full HD at the end of something out, which blurs fonts fine details such as lines. At 1280x720 which was not observed.

Everyone should decide for itself whether it can use this device. If you want to transmit, for example, some in remote areas, it can work well, because the reference to the original is not there anyway.
Longer Ethernet routes I have not tested the way.

More info here: [,,,]