The Versatile Video Coding standard was finalized by the Joint Video Exploration Team in July 2020 and is currently considered the state-of-the-art video compression technology. VVC significantly improves coding efficiency compared to HEVC thanks to several new features and tools that incur a large increase in computational cost. This paper presents a complexity and coding efficiency assessment of VVC divided into three analyses, focusing on: (1) the impact of using SIMD optimizations in the VVC Test Model software, (2) the impact of limiting partitioning structures when encoding, and (3) the computational cost associated to each encoding tool in VVC. Experimental results show that SIMD optimizations accelerate the encoding time by 40%, on average, and that limiting the available partitioning structures can decrease encoding time between 40% and 73%. The software profiling revealed that inter-frame prediction is responsible for almost half of the total encoding time. Finally, the paper also presents an analytic discussion on tools and partitioning possibilities that are rarely chosen in the mode decision process despite their high impact in coding complexity.
The new Versatile Video Coding (VVC) standard was recently developed to improve compression efficiency of previous video coding standards and to support new applications. This was achieved at the cost of an increase in the computational complexity of the encoder algorithms, which leads to the need to develop hardware accelerators and to apply approximate computing techniques to achieve the performance and power dissipation required for systems that encode video. This work proposes the implementation of an approximate hardware architecture for interpolation filters defined in the VVC standard targeting real-time processing of high resolution videos. The architecture is able to process up to 2560x1600 pixels videos at 30 fps with power dissipation of 23.9 mW when operating at a frequency of 522 MHz, with an average compression efficiency degradation of only 0.41% compared to default VVC video encoder software configuration.
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