https://wccftech.com/amd-rdna-3-gfx11-gpu-patches-enable-vcn4-support-but-lack-av1-encoding/

AMD has begun releasing patches for its RDNA 3 (GFX11) architecture last week for the LLVM project. The newest GFX11 is the GPU series known as Navi 3X and will be based upon the RDNA 3 architecture. Now that the new enablement is currently active, software engineers from AMD are beginning to create the functionality for the architecture once it becomes available later this year. Engineers have included VCN 4.0, or the Video Core Next IP block, to assist in storing the info from the video codec. However, AMD has not allowed the enablement of AV1 encoding, which Intel recently released to be more efficient than the previous AVC encoding.

Outside of AMD not including the new encoding from Intel in its support, the name for VCN 4.0 has changed since the last update. The previous version was named 'Video Core Next' but is now known as 'Video Codec Next.' It is unknown why AMD's software engineers changed the name or if it was a mistake in publishing. The inclusion of 'codec' does stand to be more capable of representation than the previous moniker.