HDMI (High-Definition Multimedia Interface) is a digital audio and video interface standard that can transmit high-definition video and multi-channel audio signals. HDMI 2.1 is the latest version of the HDMI standard, which was released in November 2017 and is an upgraded version of HDMI 2.0. HDMI 2.1 provides higher bandwidth and more functions to meet the needs of future high-definition multimedia applications. The main feature of HDMI 2.1 is increased bandwidth. The bandwidth of HDMI 2.1 has reached 48Gbps, which is more than twice that of HDMI 2.0. That means HDMI 2.1 can support higher resolutions, higher refresh rates and deeper color depths. For example, HDMI 2.1 can support 8K resolution (7680x4320) and 120Hz refresh rate, as well as 10-bit, 12-bit and 16-bit color depth. These features can provide a clearer, smoother and more realistic visual experience.

In addition to the bandwidth boost, HDMI 2.1 also offers some other new features. The most important of these is Dynamic HDR (High Dynamic Range). Dynamic HDR can dynamically adjust according to the content of each frame to provide better picture quality. In addition, HDMI 2.1 also supports eARC (enhanced Audio Return Channel), which can transmit higher-quality audio signals and support more audio formats, such as Dolby Atmos and DTS:X. HDMI 2.1 also supports frequency conversion technology, which can dynamically adjust the frame rate according to content requirements to provide a better visual experience.

HDMI 2.1 also provides some other functions, such as Quick Media Switching (QMS), which can reduce the black screen time when switching videos; Quick Frame Transport (QFT), which can reduce game delay; and Auto Low Latency Mode (ALLM), which can automatically Switch to Game Mode to reduce lag. These features can provide a better user experience, especially for game and movie lovers.

In short, HDMI 2.1 is a high-definition multimedia interface standard, which provides higher bandwidth and more functions to meet the needs of future high-definition multimedia applications. When choosing a high-definition multimedia device, you need to consider whether it supports the HDMI 2.1 standard to get a better audio-visual experience.

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