SVT-AV1 Patents: Is the AV1 Encoder Royalty-Free?

This article examines the patent landscape surrounding the SVT-AV1 (libsvtav1) encoder, exploring whether proprietary patents hinder its widespread adoption. While designed by the Alliance for Open Media (AOMedia) to be a royalty-free, open-source video codec, AV1 has faced intellectual property challenges from third-party patent pools, creating potential legal uncertainties for commercial implementers.

The AOMedia Royalty-Free Commitment

The AV1 codec was created by the Alliance for Open Media (AOMedia)—a consortium including tech giants like Google, Microsoft, Amazon, Netflix, and Intel—specifically to bypass the expensive and complex licensing web associated with HEVC (H.265).

To achieve this, AOMedia members cross-license their patents royalty-free to anyone implementing AV1. Furthermore, the license for SVT-AV1 includes a patent defense clause: if any party files a patent infringement lawsuit against an AV1 user, that party loses their rights to the AV1 patents held by AOMedia members.

The Sisvel Patent Pool Challenge

Despite AOMedia’s efforts, SVT-AV1’s widespread adoption faces friction due to external patent claims. In 2020, the licensing administrator Sisvel launched an AV1 patent pool.

Sisvel claims to represent over 1,000 patents from companies like Dolby, Philips, GE, and IP Bridge that they assert are essential to the AV1 standard. Sisvel demands licensing fees from hardware manufacturers and software distributors implementing AV1, directly challenging AOMedia’s “royalty-free” status.

Impact on SVT-AV1 and Users

Because patents cover the underlying video-coding algorithms and not just the software code, any patent encumbrances on the AV1 standard directly affect the use of the SVT-AV1 encoder. The practical implications are split into two categories:

• Open-Source and Software-Only Users: For individual developers, open-source distributors (like Linux distributions), and non-commercial users, the risk remains low. Patent holders rarely target non-commercial software distribution due to limited financial return and complex legal hurdles.
• Commercial and Hardware Implementers: For companies building commercial hardware (like TVs, smartphones, or GPUs) or proprietary software that utilizes SVT-AV1, the Sisvel patent pool represents a real financial risk. The threat of litigation has caused some commercial entities to hesitate in adopting AV1, keeping them on older standards like H.264 or paying known royalties for HEVC.

Current Legal Status

To date, there has been no definitive court ruling validating Sisvel’s patent claims against AV1, nor has there been a major ruling dismissing them. AOMedia maintains that AV1 does not infringe on these third-party patents and has established a defense fund to help members fight patent challenges. However, the mere existence of the Sisvel pool creates “fear, uncertainty, and doubt” (FUD) that continues to act as the primary patent-related barrier to the universal adoption of SVT-AV1.