信息技术.异构环境中的高效编码和媒体传送.第14部分:具有PQ传输特性的HDR/WCG Y'CbCr 4:2:0视频的转换和编码实践

[中文适用范围]： 本文件为高动态范围（HDR）和宽色域（WCG）视频内容的处理提供指导。本文件旨在为使用 AVC 或 HEVC 视频编码系统适应压缩 HDR/WCG 视频进行消费者分发应用的操作提供一套公开引用的推荐指南。 本文件包括将 4:4:4 RGB 线性光表示的视频信号转换为非恒定亮度（NCL）Y'CbCr 视频信号的过程描述，使用了 SMPTE ST 2084 和 Rec. ITU-R BT.2100 中定义的感知量化器 (PQ) 转换函数。 尽管本文件的重点主要集中在 4:2:0 Y'CbCr 10 位表示上，但这些指南也适用于其他更高位深或其他颜色格式的表示，例如 4:4:4 Y'CbCr 12 位视频。 此外，本文件还提供了一些关于使用 AVC 或 HEVC 视频编码标准压缩这些信号的高级别建议。还包括了对 NCL Y'CbCr 信号进行后解码处理步骤，以将其转换回线性光、4:4:4 RGB 表示。 [外文原描述]： This document provides guidance on the processing of high dynamic range (HDR) and wide colour gamut (WCG) video content. The purpose of this document is to provide a set of publicly referenceable recommended guidelines for the operation of AVC or HEVC video coding systems adapted for compressing HDR/WCG video for consumer distribution applications. This document includes a description of processing steps for converting from 4:4:4 RGB linear light representation video signals into non-constant luminance (NCL) Y′CbCr video signals that use the perceptual quantizer (PQ) transfer function defined in SMPTE ST 2084 and Rec. ITU-R BT.2100. Although the focus of this document is primarily on 4:2:0 Y′CbCr 10 bit representations, these guidelines are also applicable to other representations with higher bit depth or other colour formats, such as 4:4:4 Y′CbCr 12 bit video. In addition, this document provides some high-level recommendations for compressing these signals using either the AVC or HEVC video coding standards. A description of post-decoding processing steps is also included for converting these NCL Y′CbCr signals back to a linear light, 4:4:4 RGB representation.