HDMI 4K Compatibility

As interest and enthusiasm in 4K technology continues to surge, many of our customers continue to have questions regarding cable compatibility. First and foremost among these questions is: Are AudioQuest HDMI cables 4K compliant?

The answer, of course, is Yes.

The single qualification by which an HDMI cable is deemed 4K compliant is its ability to pass 18Gbps. In other words, if an HDMI cable can pass 18Gbps, then it is compatible with 4K.

18Gbps data rates allow for, but are not limited to, the following advancements in image reproduction:

  • Resolution up to 3840 x 2160
  • Wide Color Gamut: 10-bit color depth (with possible provisions for 12-bit in the future)
  • High Dynamic Range (HDR)

The following frame rates:

  • 120p, 119.88p, 100p, 60p, 59.94p, 50p, 30p, 29.97p, 25p, 24p, 23.976p

The following Chroma Sub-Sampling:

  • 4:4:4: In which every image pixel has its chrominance value included. Y/Cr/CB all have the same sampling rate. Therefore, there is no sub-sampling. (100% of the color.)
  • 4:2:2: In which the horizontal chroma resolution is halved, with vertical resolution remaining full. This reduces the bandwidth of an uncompressed video signal by one-third, with little to no visual difference (1/2 the horizontal resolution with full vertical resolution; 50% of the color.)
  • 4:2:0: In which both the vertical and horizontal resolutions are halved, leaving 25% of the color information.
    • It is important to note that Ultra HD Blu-Ray discs are all encoded at 4:2:0.

All AudioQuest HDMI cables, up to 8.0m, are capable of achieving data rates of 18Gbps (or greater). Thus, all AudioQuest cables, up to 8.0m, are compatible with 4K.

While the transition from standard-definition to high-definition (720p or 1080i) television was driven by a federal mandate, 4K is an industry initiative and should be viewed as a progressive maturation of technologies. HDMI customers can be confident that all AudioQuest HDMI cables, up to 8.0m, are 100% Capable, meeting the 18Gbps requirements for 4K.