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Concept
AV1
Summary
AOMedia Video 1 (AV1) is an open, royalty-free video coding format initially designed for video transmissions over the Internet. It was developed as a successor to VP9 by the Alliance for Open Media (AOMedia), a consortium founded in 2015 that includes semiconductor firms, video on demand providers, video content producers, software development companies and web browser vendors. The AV1 bitstream specification includes a reference video codec. In 2018, Facebook conducted testing that approximated real-world conditions, and the AV1 reference encoder achieved 34%, 46.2% and 50.3% higher data compression than libvpx-vp9, x264 High profile, and x264 Main profile respectively.
Like VP9, but unlike H.264 (AVC) and H.265 (HEVC), AV1 has a royalty-free licensing model that does not hinder adoption in open-source projects.
AVIF is an that uses AV1 compression algorithms.
The Alliance's motivations for creating AV1 included the high cost and uncertainty involved with the patent licensing of HEVC, the MPEG-designed codec expected to succeed AVC. Additionally, the Alliance's seven founding members – Amazon, Cisco, Google, Intel, Microsoft, Mozilla and Netflix – announced that the initial focus of the video format would be delivery of high-quality web video. The official announcement of AV1 came with the press release on the formation of the Alliance for Open Media on 1 September 2015. Only 42 days before, on 21 July 2015, HEVC Advance's initial licensing offer was announced to be an increase over the royalty fees of its predecessor, AVC. In addition to the increased cost, the complexity of the licensing process increased with HEVC. Unlike previous MPEG standards where the technology in the standard could be licensed from a single entity, MPEG LA, when the HEVC standard was finished, two patent pools had been formed with a third pool on the horizon. In addition, various patent holders were refusing to license patents via either pool, increasing uncertainty about HEVC's licensing.
Official source
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