Abstract
The ITU-T Video Coding Experts Group (VCEG) and ISO/IEC Moving Picture Experts Group (MPEG) issued in October 2017 a joint Call for Proposals (CfP) on video compression with capability beyond HEVC. The joint CfP included three categories of content: standard dynamic range (SDR), high dynamic range and wide color gamut (HDR/WCG), and 360° omni-directional video (360°). This paper describes a response to the joint CfP that considers all three categories of video content. The core codec in the response is designed based on the joint exploration model (JEM) reference software. The key coding tools in the JEM are significantly simplified to reduce both average and worst-case complexity for hardware design with negligible coding performance loss. Furthermore, two additional coding tools are used to further improve coding efficiency. For the HDR and 360° categories, additional coding tools specifically designed to optimize the compression efficiency and subjective quality of that specific content category are included. Further, some SDR coding tools are modified to alleviate subjective quality problems. For the random access configuration, compared to the HEVC test model (HM) anchor, the proposed video codec achieves average luma rate savings of 35.7%, 31.3%, and 33.9% for the SDR, HDR, and 360° categories, respectively.
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