The bandwidth availability of passive HDMI 2.1 cables is limited to a few meters, unless active cables are used, however, which require an additional connector to be powered. A clutter that should soon be a thing of the past thanks to HDMI Cable Power.
Cable Power, HDMI 2.1a standard feature
The HDMI 2.1a standard known for the contribution of the SBTM function (see our CES 22 news > New HDMI 2.1a standard, SBTM function in the menu (Source‑Based Tone Mapping) is changing with the addition of the amendment 1. This brings Cable Power compatibility, allowing active cables to be powered directly from the HDMI connector, without additional linking, and over longer lengths than before.The idea is to offer with an active cable large size the same ergonomics as a passive cable.
Cable Power HDMI cables compatible with non-certified equipment
the Cable Power functionality but also suitable HDMI sources. At the moment we do not know of any such device, but no doubt they should arrive soon. Namely, on cables specified Cable Power, these can be used only in one direction: one end of the cable is dedicated to the source and the other to the connected device. Do not panic, in case of reverse connection, no damage is to be feared but the connection will be inoperative. Finally, initially, cables with the Cable Power logo will be marketed with an external power supply via USB-B or USB-C for use on sources without Cable Power certification.
