The HDMI interface was proposed in 2002 and has now evolved to the HDMI 2.1 standard. The HDMI 2.1 standard can support 4K 120Hz and 8K 60Hz, supports high dynamic range imaging (HDR), can be optimized for scenes or frame numbers, and is backward compatible with HDMI 2.0 and HDMI 1.4. The most important thing is that it transmits both video and audio simultaneously.

Nowadays, many monitors have built-in speakers that can transmit images and sound simultaneously using only one HDMI cable, which is also a major advantage of HDMI. Because of this, HDMI has become the most common interface for displays today. There are several types of HDMI on physical interfaces. There are mainly standard HDMI interfaces, mini HDMI interfaces, and Micro HDMI interfaces. For long-distance transmission of HDMI cables, it is generally recommended to use hard wires on devices with standard HDMI interfaces to obtain stable connections. The Mini HDMI interface and Micro HDMI interface are more suitable for small devices.

In 2018, the HDMI Association launched the HDMI 2.1 standard. Currently, the bandwidth of HDMI 2.0b is 18Gbps, while HDMI 2.1 has been increased to 48Gbps. It can fully support lossless videos with resolutions such as 4K/120Hz, 8K/60Hz, and 10K, and also supports high dynamic video HDR technology. Therefore, the new standard adopts a new Ultra High Speed HDMI Cable.