The HDMI matrix is also called the HDMI video matrix; in simple terms, the HDMI matrix is a multi-input and multi-output device that integrates HDMI distribution and HDMI switching functions. It can output multiple HDMI signals at the same time, and it can also output 1 HDMI signal. Distributed into multiple outputs. Common HDMI video matrices generally support panel switch control and infrared remote control switch control; some HDMI matrices support RS232 control, LAN connection control, SPDIF optical digital audio output, external IR infrared input, etc.

An HDMI switch takes multiple sources (say a games console, a PC, Apple TV, and so on and outputs via a single cable to your PC monitor, TV, or projector. An HDMI splitter takes a single source and sends it to multiple screens say a PC monitor and a 4K TV at the same time.

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