What is an HDMI Splitter and Use?

A High Definition Multimedia Interface (HDMI) signal is sent through an HDMI Cable. It is designed to be used with extra high resolution video feeds coming from DVD, Bluray, etc., which are then routed to a compatible viewing screen such as a television or computer monitor. HDMI cables are capable of different speeds based on the materials used to create them.
HDMI uncompressed digital signals can be carried through a cable with resolutions of up to 1080 pixels in vertical size (which is commonly set to 1920 pixels horizontally), although there are many configurations that can be carried with the HDMI cable. If necessary, the HDMI signal can downscale to 720 pixels when connected to a television that can only handle the lower mode.
Users may need to split this signal in order to distribute it among several screens. Such setups are possible via HDMI splitters, which are commonly used in bars, electronics stores, etc.
The HDMI splitter is a specialized accessory that is used to split an HDMI signal into many, which can then be connected to multiple display devices. An HDMI cable usually has an end that goes into the device output and another end that has two or more HDMI outputs that have been split from the single line. Alternatively, hardware splitters are connected to the output device via an HDMI cable and are used with an external power source to split the signal among multiple display devices. These cables can be configured to easily split a line among four or more displays at once.
The HDMI splitter only splits the original signal, which is shown on all of the connected devices. The image that appears on all screens will be identical and cannot be independently controlled when connected to an HDMI compatible device such as HD receivers/antennas.
The HDMI splitter is not to be confused with an routing Switch HDMI. A routing switcher places multiple HDMI compatible output sources into a signal that can be changed manually or via remote control and can dictate what output reaches the display(s).