A Unified Video Codec for SDR, HDR, and 360° Video Applications
A Unified Video Codec for SDR, HDR, and 360° Video Applications
复制标题
适用于 SDR、HDR 和 360° 视频应用的统一视频编解码器
DOI：
10.1109/tcsvt.2019.2945698
复制
发表时间：
2020-05
影响因子：
8.4
通讯作者：
Xiaoyu Xiu;Philippe Hanhart;Yuwen He;Yan Ye;R. Vanam;Taoran Lu;Fangjun Pu;P. Yin
中科院分区：
文献类型：
--
作者：
Xiaoyu Xiu;Philippe Hanhart;Yuwen He;Yan Ye;R. Vanam;Taoran Lu;Fangjun Pu;P. Yin
ITU-T视频编码专家组（VCEG）和ISO/IEC运动图像专家组（MPEG）于2017年10月发布了关于具有超越HEVC能力的视频压缩的联合提案征集（CfP）。联合CfP包括三类内容：标准动态范围（SDR）、高动态范围和宽色域（HDR/WCG）以及360°全向视频（360°）。本文描述了一个响应联合CfP认为所有三类视频内容。响应中的核心编解码器是基于联合探索模型（JEM）参考软件设计的。JEM中的关键编码工具被显著简化，以降低硬件设计的平均和最坏情况的复杂性，而编码性能损失可以忽略不计。此外，使用两个额外的编码工具来进一步提高编码效率。对于HDR和360°类别，包括专门设计用于优化该特定内容类别的压缩效率和主观质量的附加编码工具。此外，一些SDR编码工具被修改以减轻主观质量问题。对于随机存取配置，与HEVC测试模型（HM）锚相比，所提出的视频编解码器对于SDR、HDR和360°类别分别实现35.7%、31.3%和33.9%的平均亮度速率节省。
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.