These are functional groups within the Alliance and often address one or more technical challenges. They are chaired by two member companies.
Sub-groups represent an idea within a working group that seems bigger than just a project (i.e., more than one challenge to address) but aren’t quite robust enough to warrant a separate working group. They usually have one chair.
Study groups are formed to investigate a particularly interesting aspect of the streaming video space (i.e., VR, AI, ML). That aspect is often too young of a technology to formalize specific responses such as a best practice, specification, or guideline.
Proof of Concepts (PoC) represent a real-world application of a working group’s output. These are often a collaboration of member companies and will usually result in published data and additional documentation.
Many of the working groups, sub groups, and study groups pursue projects related to the technical challenges in a variety of different topical areas.