12G

12G is a term used in different contexts and has no single, universally recognized definition. In professional video technology, 12G-SDI refers to a high-speed serial digital interface that transmits video, audio, and data at 12 gigabits per second over a single coaxial cable. This capability supports uncompressed 4K and higher frame-rate formats, enabling longer cable runs and simpler infrastructure in broadcast and post-production environments. 12G-SDI is part of the family of SDI interfaces used in professional video workflows.

In wireless and mobile communications, 12G is sometimes discussed as a hypothetical twelfth generation of wireless technology following 6G. As of the mid-2020s, there is no formal 12G standard from major bodies such as the ITU or 3GPP. Proposals and analyses describe 12G as a future evolution that could feature extremely high data rates, ultra-low latency, AI-native network management, and operation across higher-frequency bands such as sub-terahertz. Because no official standard exists, timelines and specifications remain speculative and subject to change.

Outside of these technical domains, 12G can appear as a model number, product branding, or shorthand in various industries where the letter G denotes generation or grouping rather than a formal specification. In such cases, the meaning of 12G depends on the particular context and should be clarified with the source material.