信息技术.MPEG视频技术.第7部分:编码视频比特流的通用补充增强信息消息

[中文适用范围]： 本文件规定了视频可用性信息（VUI）参数和补充增强信息（SEI）消息的语法和语义。 本文件定义的VUI参数和SEI消息旨在以视频编解码规范中规定的方式在编码视频比特流中传递，或以其他方式由使用此类编码视频比特流的系统规范确定。 本文件特别适用于根据ITU-T H.266 | ISO/IEC 23090-3 规定的编解码视频比特流，尽管它是以通用格式起草的，也可以用于其他类型的编码视频比特流。 VUI参数和SEI消息可以辅助与解码、显示或其他目的相关的过程。然而，除非在引用规范中另有规定，否则视频解码器或接收视频系统的解读和使用本文件中规定的VUI参数和SEI消息不是强制性功能。 尽管对VUI参数和SEI消息指定了语义，但解码器和接收视频系统可以忽略VUI参数和SEI消息的内容，或者以与本文档中规定的方式略有不同的方式使用它们。 [外文原描述]： This document specifies the syntax and semantics of video usability information (VUI) parameters and supplemental enhancement information (SEI) messages. The VUI parameters and SEI messages defined in this document are designed to be conveyed within coded video bitstreams in a manner specified in a video coding specification or to be conveyed by other means determined by the specifications for systems that make use of such coded video bitstreams. This document is particularly intended for use with coded video bitstreams as specified by Rec. ITU‑T H.266 | ISO/IEC 23090-3, although it is drafted in a manner intended to be sufficiently generic that it can also be used with other types of coded video bitstreams. VUI parameters and SEI messages can assist in processes related to decoding, display or other purposes. However, unless otherwise specified in a referencing specification, the interpretation and use of the VUI parameters and SEI messages specified in this document is not a required functionality of a video decoder or receiving video system. Although semantics are specified for the VUI parameters and SEI messages, decoders and receiving video systems can simply ignore the content of the VUI parameters and SEI messages or can use them in a manner that somewhat differs from what is specified in this document.