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Ready? HDMI 2.1 certification
Nov 13, 2018

In August 2018, the HDMI Association official website announced the HDMI 2.1 CTS test requirements (requires HDMI Premiun membership download).

With the release of the HDMI 2.1 CTS specification, the company has been waiting for a long time, and has experienced many times of "jumping" HDMI2.1 certification, this time really "coming soon" can apply for certification.

Are many Chinese companies concerned with HDMI 2.1 ready?

HDMI 2.1 history

● In January 2017, the HDMI Association announced the upcoming HDMI2.1 standard, with a maximum support of 10K.

● In November 2017, the HDMI Association released the HDMI 2.1 specification - HDMI Specification 2.1;

● August 2018 HDMI Association released HDMI 2.1 test requirements - HDMI 2.1 CTS;

● In the third quarter of 2018, HDMI 2.1 certification was opened.


HDMI 2.1 feature highlights

1. Support a series of higher resolutions and faster refresh rates, including 8k@60hz and 4k@120hz immersive visuals, smooth and fast motion details.

2. Dynamic HDR ensures that each moment of the video can display its ideal depth, detail, brightness, contrast and wider color gamut on a frame-by-frame basis.

3, 48G wire, making 48Gbps bandwidth uncompressed HDMI 2.1 function support including 8K HDR video. The cable is backward compatible with earlier HDMI versions and can be used with existing HDMI devices.

4, eARC supports the most advanced audio format, object-based multi-channel audio format support, advanced audio signal control functions, including automatic detection of the device.

5, game mode VRR color, variable refresh rate, so that the image displayed by the 3D graphics processor is more smooth and more detailed game rendering, as well as reducing picture delay, aphony and frame tear.


The HDMI 2.1 standard places considerable demands on traditional HDMI manufacturers, including cables, connectors, and processing technologies that require major changes:

The bare cable needs to meet the transmission speed of 48G high frequency, and the fiber, parallel pair, coaxial and other structures will appear;

The connector needs to be redesigned, the PCB is returned to the connector structure, and higher EMC (electromagnetic compatibility) and high frequency transmission requirements are required;

Wire processing requires higher requirements for wire processing and soldering to meet the stability of 48G transmission, and sufficient margin is required for selecting bare cables and connectors, and corresponding test equipment needs to be added.


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