How to separate audio from HDMI? Working principle of HDMI audio splitter

2021-10-15 17:41:02 ekL

The origin of HDMI audio splitter

        The emergence of HDMI audio splitter is to solve the problem that some hosts with only 1 HDMI output interface want to use the audio and video in the HDMI signal at the same time, or want to use audio on the display side. Some HDMI monitors do not have audio output. When in use, there is only one HDMI output, so it is difficult to use the audio signal in HDMI. Some HDMI monitors have audio output, but only analog audio output. What is needed is digital audio in HDMI.

HDMI audio splitter

HDMI audio splitter

Working principle of HDMI audio splitter

        In layman's terms, the HDMI audio splitter is to make a copy of the HDMI signal, and then 1 channel of HDMI output to the display, if the display also supports audio output, there will still be audio; the other channel separates the digital audio in the HDMI , And then converted into optical audio output, coaxial audio output, 3.5mm analog audio output; some HDMI audio splitters also support DTS-HD, Dolby True HD, 2.1 channel and 5.1 channel output; Support HDMI ARC digital audio return, CEC function, and 4K*2K@30Hz HD resolution; there will be a switch on the machine to switch between 2.1 channel output, 5.1 channel output and ARC audio return

HDMI audio splitter interface description

HDMI audio splitter interface description diagram

HDMI audio splitter interface description diagram

HDMI audio splitter schematic

Working principle diagram of HDMI audio splitter

Working principle diagram of HDMI audio splitter

HDMI audio splitter application scenarios

        Large screen application scenarios

        In subway stations, high-speed rail stations, squares and other large splicing screen advertisements, you can use HDMI audio separators to separate the audio for independent playback; in some school evenings, weddings, private theaters and other scenes, use HDMI audio separators to output 5.1 channels, Better to set off the on-site atmosphere

        Other application scenarios

        It can also be used at home, such as home theater, whether it is connected to game consoles, computer hosts, Blu-ray players, etc., we connect the audio directly from the HDMI audio splitter to the 2.1 or 5.1 audio system, and it is not used when it is used. To switch the audio connection, you only need to use the same HDMI cable, which greatly simplifies the operation and reduces the space occupied by the device. The entire environment is beautiful

HDMI audio splitter application scenario-home theater