At the conference QoMEX (Quality of Multimedia Experience) in one of the reports presentsthe results of testing the AV2 video encoding format, developed by the Open Media Alliance (AOMedia) and replacing the AV1 format. When using quality assessment metrics VMAF (Video Multi-Method Assessment Fusion), developed by the company Netflix, the use of the AV2 codec allowed us to achieve a 32.59% reduction in bitrate compared to the AV1 codec at the same quality level. When using the metrics PSRN-YUV (Peak-Signal-to-Noise Ratio 14:1:1), the bitrate was reduced by 28.63%. Testing involves the release of AVM 11.0 with the AV2 reference implementation.
AV2 video encoding format does not require licenses royalties and allows free use of related technologies, patents and intellectual property. Features of AV2: optimization for use in streaming; significant improvement in compression performance compared to AV1; expanded support for virtual and augmented reality capabilities; support for a wider range of visual quality; the ability to simultaneously deliver several videos within one video stream with support for their separate display on the screen.
AV2 continuesto use a hybrid block-based structure, but unlike AV1, it supports larger 256×256 superblocks, fully recursive partitioning, and more efficient separation of brightness and color parameters. AV2 uses a unified exponential quantizer that covers a wider range of brightness and provides greater quantization accuracy for 8-, 10- and 12-bit video, and also better manages low bitrates.