HDMI Forum Indicates 48G Cable Certification Program Coming Soon
Although the first HDMI 2.1 48G brand cable was announced as early as the end of 2018, they were not officially certified by the HDMI Forum because the HDMI 2.1 certification program was not ready at the time and is still not ready. However, many cable developers Prototypes of their HDMI 48G cable products have been demonstrated, which are marked as ultra-high speed HDMI. In addition, TV manufacturers are preparing the first Ultra HD TVs to use HDMI 2.1.
The HDMI 2.1 48G cable uses 4 data channels, each running at 12 Gbps with a total bandwidth of 48 HDMI 2.1 48G cable uses four data channels, each running at 12 Gbps with a total bandwidth of 48 Gbps , higher than the current 18 Gbps, but still maintain backward compatibility with existing equipment. The extra bandwidth provided by HDMI 2.1 enables it to support new Ultra HD resolutions and refresh rates, including 4Kp120, 8Kp100/120, 10Kp100/120 and upcoming color spaces. In fact, high resolution and bit depth will quickly consume 48 Gbps bandwidth, so for anything higher than 8Kp60 with 4:2:0 chroma subsampling and 10-bit color, VESA's DSC 1.2a link compression technology is used.
Since HDMI 2.1 48G cables and signal sources and receivers are physically different from existing HDMI 1.4 / 2.0 cables, product manufacturers must adopt new manufacturing methods, and the HDMI Forum must introduce new certification programs, including various Compliance testing to ensure that the interconnect works properly at high data rates and supports all features. The HDMI Forum acknowledges that cable manufacturers often have enough experience to build HDMI 2.1 48G products. However, because there is no HDMI 2.1 48G certification program, they are not recommended to sell products marked with ultra-high-speed HDMI cables.
The HDMI Forum plans to launch its UHS HDMI Interconnect Certification Program in the coming months, so it is expected that HDMI 48G copper and fiber-optic cables officially certified by the HDMI Forum will be available in the foreseeable future. In addition, once compliance testing is in place, TV manufacturers will be able to mark their TVs as HDMI 2.1 compliant.