Hector Caceres | Mar 17, 2017

The Problem

One of the most common problems on setups that use HDMI splitters is that some of the displays do not match the resolution of the other displays. For example: one display may support up to 1080p resolutions, while the other display may support 4k.

Since the EDID (Extended Display Identification Data) handshake requires the splitter to send out an identical signal to all the displays, when the splitter detects that one display only supports up to 1080p, it then sends an identical 1080p signal to all of the 4k displays.

Most of the time this goes unnoticed. But for people that want to get the most out of their expensive TV's this is very noticeable. Especially when watching 4k content since the lower resolution will make all the other displays look inferior.

The solution

To solve this, you can use an HDMI Downscaler between your splitter and your 1080p display. The way a downscaler works is that it receives a 4k signal, and "downscales" it into a 1080p signal. This way, the splitter is forced to send a 4k signal to all the displays because it thinks that all of the displays are 4k.

Here is a video explaining more about the Echo Downscaler by Sewell.

NOTE: The Echo used in the video is an old model, but the same principle applies. The new model of the Echo is a Downscaler AND Upscaler, meaning you can also "Upscale" a video signal that is only 1080p and turn it into a 4k signal.