Abstract
The audiovisual entertainment industry has entered a race to find the video encoder offering the best Rate/Distortion (R/D) performance for high-quality high-definition video content. The challenge consists in providing a moderate to low computational/hardware complexity encoder able to run Ultra High-Definition (UHD) video formats of different flavours (360°, AR/VR, etc.) with state-of-the-art R/D performance results. It is necessary to evaluate not only R/D performance, a highly important feature, but also the complexity of future video encoders. New coding tools offering a small increase in R/D performance at the cost of greater complexity are being advanced with caution. We performed a detailed analysis of two evolutions of High Efficiency Video Coding (HEVC) video standards, Joint Exploration Model (JEM) and Versatile Video Coding (VVC), in terms of both R/D performance and complexity. The results show how VVC, which represents the new direction of future standards, has, for the time being, sacrificed R/D performance in order to significantly reduce overall coding/decoding complexity.
Highlights
The importance of developing high-performance video codecs for the audiovisual entertainment industry is widely recognized
We summarized the evolution of the JVET exploration process to propose a new video coding standard that significantly improves the performance of HighEfficiency Video Coding (HEVC)
We performed an exhaustive experimental study to analyze the behavior of Joint Exploration Model (JEM) and Versatile Video Coding (VVC) video coding projects in terms of coding performance and complexity
Summary
The importance of developing high-performance video codecs for the audiovisual entertainment industry is widely recognized. The HighEfficiency Video Coding (HEVC) standard [1] was initially intended to be the successor of AVC/H.264 [2] It did not penetrate the industry as successfully (mainly due to licensing costs), and other alternatives promising better performance or royalty-free usage emerged [3,4]. Showed that the new model (JEM 3.0) achieved an 18% reduction in bit rate, at the expense of a major increase in computational complexity (60x) with respect to HEVC. The main objective of VVC is to significantly improve compression performance compared to the existing HEVC, supporting the deployment of higher-quality video services and emerging applications such as 360◦ omnidirectional immersive multimedia and high-dynamic-range (HDR) video.
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