All about HDMI 2.1 10K resolution support, Dynamic HDR, 32 audio channels

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Recently, the HDMI standard version 2.1 has just been announced with the ability to output quality images up to 10K, 8K/60fps, or 4K/120fps thanks to 48Gbps data transmission bandwidth, about three times higher than the current HDMI 2.0 standard 18Gbps.

The new HDMI 2.1 also supports Dynamic HDR, which corrects and synchronizes picture information frame by frame, providing more vivid colors and contrast than current HDR-enabled TVs.

Besides stopping at image quality, HDMI 2.1 is also equipped with many new features to optimize the screen refresh rate for peripheral devices. That requires as low latency as possible such as VR, AR virtual reality glasses, or users’ gaming and entertainment needs. These include:

Variable Refresh Rate dynamically changes the refresh rate in response to the processing speed of the source, thereby reducing latency and eliminating the tearing inherent in conventional displays.

Quick Frame Transport increases image transmission speed and improves response if a low-frequency source outputs to a screen that supports a high refresh rate (for example, when playing games, set the refresh rate to 60Hz and output to the screen 240Hz).

– Quick Media Switching eliminates the black screen phenomenon when changing the source.

– Auto Low Latency Mode automatically optimizes latency when playing different content (for example, watching movies at 24fps and playing games at 60fps).

In terms of audio, HDMI 2.1 has also been upgraded to the eARC (Enhanced Audio Return Channel) standard, which supports 32 uncompressed audio channels, opening up the potential to make the most of 5.1 or 7.1 speaker systems as well as audio technologies. Multidimensional like DTS: X, Dolby Atmos is gradually being commercialized for the consumer segment.

Especially popular TVs have not used up the current power of the HDMI 2.0 port, which can output a maximum resolution of 4K/60fps (with two HDMI 2.0a updates supporting HDR technology and HDMI 2.0b supports HLG – Hybrid Gamma-Log, another HDR standard).

HDMI Forum – the organization responsible for researching and developing HDMI signal output standards, said they are very optimistic about the development speed of picture quality and the growth momentum of the display screen market, requiring connectivity standards to be ready for the future trends.


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