MuZero with Self-competition for Rate Control in VP9 Video Compression

• URL: http://arxiv.org/abs/2202.06626v1
• Date: Mon, 14 Feb 2022 11:27:27 GMT
• Title: MuZero with Self-competition for Rate Control in VP9 Video Compression
• Authors: Amol Mandhane, Anton Zhernov, Maribeth Rauh, Chenjie Gu, Miaosen Wang, Flora Xue, Wendy Shang, Derek Pang, Rene Claus, Ching-Han Chiang, Cheng Chen, Jingning Han, Angie Chen, Daniel J. Mankowitz, Jackson Broshear, Julian Schrittwieser, Thomas Hubert, Oriol Vinyals, Timothy Mann
• Abstract summary: We present an application of the MuZero algorithm to the challenge of video compression. We show that the MuZero-based rate control achieves an average 6.28% reduction in size of the compressed videos for the same delivered video quality level.
• Score: 31.57572275235357
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Video streaming usage has seen a significant rise as entertainment, education, and business increasingly rely on online video. Optimizing video compression has the potential to increase access and quality of content to users, and reduce energy use and costs overall. In this paper, we present an application of the MuZero algorithm to the challenge of video compression. Specifically, we target the problem of learning a rate control policy to select the quantization parameters (QP) in the encoding process of libvpx, an open source VP9 video compression library widely used by popular video-on-demand (VOD) services. We treat this as a sequential decision making problem to maximize the video quality with an episodic constraint imposed by the target bitrate. Notably, we introduce a novel self-competition based reward mechanism to solve constrained RL with variable constraint satisfaction difficulty, which is challenging for existing constrained RL methods. We demonstrate that the MuZero-based rate control achieves an average 6.28% reduction in size of the compressed videos for the same delivered video quality level (measured as PSNR BD-rate) compared to libvpx's two-pass VBR rate control policy, while having better constraint satisfaction behavior.

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