ISO/IEC TR 23008-15:2018 信息技术 在混杂环境中的高效编码和媒体传递 第15部分：HDR/WCG视频的信号、向后兼容和显示适配
标准编号：ISO/IEC TR 23008-15:2018
中文名称：信息技术 在混杂环境中的高效编码和媒体传递 第15部分：HDR/WCG视频的信号、向后兼容和显示适配
英文名称：Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 15: Signalling, backward compatibility and display adaptation for HDR/WCG video
发布日期：2018-08
标准范围
本文档回顾了HDR/WCG视频内容的处理和编码方法。本文件的目的是为适用于压缩HDR/WCG视频的AVC或HEVC视频编码系统的操作提供一组可公开参考的方法，以供消费者分销应用。本文件首先回顾了适用于HDR/WCG视频的视频可用性信息（VUI）指标和补充增强信息（SEI）信息。它描述了将4:4:4 RGB线性光表示视频信号转换为具有ICTCP颜色表示和感知量化器（PQ）传递函数，或具有Y′CbCr颜色表示和HLG传递函数（ICTCP、PQ和HLG在参考ITU-R BT.2100-1中定义）的视频信号的处理步骤。一些使用Rec压缩这些信号的高级方法。提供了ITU-T H.264 | ISO/IEC 14496-10或建议ITU-T H.265 | ISO/IEC 23008-2。还包括解码后处理步骤的描述，用于转换回线性光4:4:4 RGB表示。该文件还涉及标准动态范围（SDR）向后兼容性，即与无法检测和正确显示HDR/WCG视频内容的传统解码系统的兼容性。它描述了使用三种不同解决方案实现此功能的示例:使用HLG作为向后兼容的传输函数，使用CRI和TMI SEI消息，使用具有可扩展的HEVC主10配置文件和SDR兼容基本层的双层方法。最后，本文件说明了如何使用CRI SEI消息来传递元数据，从而使解码视频的显示侧的动态范围和色域适应显示功能。注:本文件补充了ITU-T H.Sup15 | ISO/IEC TR 23008-14中提供的材料，该材料侧重于使用PQ传递函数对非恒定亮度（NCL）Y′CbCr视频信号的转换和编码实践。
This document reviews approaches for processing and coding of HDR/WCG video content. The purpose of this document is to provide a set of publicly-referenceable methods for the operation of AVC or HEVC video coding systems adapted for compressing HDR/WCG video for consumer distribution applications.This document first includes a review of the video usability information (VUI) indicators and supplemental enhancement information (SEI) messages applicable for HDR/WCG video. It provides a description of processing steps for converting from 4:4:4 RGB linear light representation video signals into video signals with ICTCP colour representation and perceptual quantizer (PQ) transfer function, or with Y′CbCr colour representation and HLG transfer function (ICTCP, PQ and HLG are defined in Rec. ITU-R BT.2100-1). Some high-level approaches for compressing these signals using either Rec. ITU-T H.264 | ISO/IEC 14496-10 or Rec. ITU-T H.265 | ISO/IEC 23008-2 are provided. A description of post-decoding processing steps is also included for converting back to a linear light, 4:4:4 RGB representation. The document also addresses the standard dynamic range (SDR) backward compatibility, that is, the compatibility with legacy decoding systems that are not able to detect and properly display HDR/WCG video content. It describes example implementations of this feature using three different solutions: using HLG as a backward compatible transfer function, using CRI and TMI SEI messages, using dual-layer approach with the Scalable Main 10 profile of HEVC and an SDR compatible base layer. Finally, the document illustrates the usage of CRI SEI messages to convey metadata enabling the dynamic range and colour gamut adaptation at the display side of the decoded video to the display capabilities.NOTE The document complements the material provided in ITU-T H.Sup15 | ISO/IEC TR 23008-14, which is focused on conversion and coding practices for non-constant luminance (NCL) Y′CbCr video signals using the PQ transfer function.
标准预览图
