AOM AV1 Encoder Sees Big Boost With Additional AVX2 Optimization
Written by Michael Larabel in Multimedia on 9 September 2020 at 06:48 PM EDT. 7 Comments
MULTIMEDIA --
It should come as little surprise in general but making use of Advanced Vector Extensions (AVX) for multimedia encode/decode is a big deal for performance. While one could hope that by 2020 most open-source encoders were already extensively utilizing AVX(2), that isn't yet the case with the latest being AOM-AV1 picking up another optimization.

Google engineers have added an AVX2-optimized high bit-depth temporal filter for the AOM-AV1 video encoder.

That optimized code is yielding an 8.96x gain compared to the conventional C code without the AVX2 optimization.

This comes following other recent AVX2 related work for this AOMedia reference video encoder around the royalty-free format.

AOM-AV1 generally performs quite slow compared to other AV1 encoders but especially Intel's SVT-AV1 that is making extensive use of AVX. Here's to hoping Google and other stakeholders working on AOM-AV1 are renewing their emphasis on performance and planning to make more extensive use of AVX2.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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