ICS 35.110 CCS M73 YD 中华人民共和国 通信行业标准 YD/T XXXXX—XXXX 基于流式的直播多码率自适应协议 Live multi-rate adaptive protocol based on streaming (LAS) (报批稿) XXXX - XX – XX发布 XXXX - XX - XX实施 中华人民共和国工业和信息化部   发 布 YD/T XXXX—XXXX I目  次 前言 ..................................................................................................................................................................... III 引言 ..................................................................................................................................................................... IV 1 范围 ................................................................................................................................................................. 1 2 规范性引用文件 ............................................................................................................................................. 1 3 术语、定义和缩略语 ..................................................................................................................................... 1 3.1 术语和定义 .......................................................................................................................................... 1 3.2 缩略语 .................................................................................................................................................. 1 4 基于流式的直播多码率自适应协议概述 ..................................................................................................... 2 4.1 概述 ...................................................................................................................................................... 2 4.2 媒体呈现描述 ...................................................................................................................................... 2 4.3 LAS请求描述 ...................................................................................................................................... 2 4.4 LAS服务描述 ...................................................................................................................................... 2 4.5 LAS客户端描述 .................................................................................................................................. 2 5 媒体呈现描述 ................................................................................................................................................. 3 5.1 概述 ...................................................................................................................................................... 3 5.2 层次化数据模型 .................................................................................................................................. 3 6 LAS请求描述 ................................................................................................................................................. 4 6.1 概述 ...................................................................................................................................................... 4 6.2 LAS请求语法 ...................................................................................................................................... 4 6.3 LAS请求生成 ...................................................................................................................................... 5 6.4 LAS请求响应规范 .............................................................................................................................. 6 附录 A（资料性） MPD示例 .............................................................................................................................. 8 A.1 MPD示例 ............................................................................................................................................. 8 附录 B（资料性） LAS请求示例 ..................................................................................................................... 10 B.1 LAS请求示例 ...............