自适应比特率视频流的适时封装机制

计算机与现代化

自适应比特率视频流的适时封装机制

思科系统（中国）研发有限公司SVPTG部门，上海200233

收稿日期:2014-08-20 出版日期:2014-11-27 发布日期:2014-12-10
作者简介:李建（1978-），男，浙江嘉兴人，思科系统（中国）研发有限公司SVPTG部门视频架构师，硕士，研究方向：多媒体通信，宽带通信。

A Just-in-time Encapsulation Mechanism for Adaptive Bit Rate Videos

Dept. of SVPTG, Cisco Systems（China）R&D Co. Ltd., Shanghai 200233, China

Received:2014-08-20 Online:2014-11-27 Published:2014-12-10

摘要/Abstract

摘要：

自适应比特率流媒体（ABR）因为能够自动适应用户网络和回放条件的变化，已经成为当今主流的流媒体技术之一。但是,如今的互联网一直流行HLS,HSS,HDS和MPEG-DASH等多种ABR技术，

为了能够同时服务这些格式，ABR服务器不得不为每种客户端建立一个独立的副本，这极大地浪费了存储和带宽。为了解决这个问题，本文设计一个针对ABR视频流的适时封装机制。通过该机制，服务器

只需存贮一个通用格式就能够实时按需地将通用格式转换成最终客户的具体格式，增加了服务器自适应的灵活性，节省了服务器和网络环节的存储和带宽成本。

关键词: 自适应比特率视频流, 适时封装, 自适应传输流

Abstract:

The adaptive bit rate streaming is one of todays video streaming technologies and has attracted a wide spread attention since its media server can

automatically adapts to any change in each users network and playback conditions. There are a few different adaptive bit rate videos streaming technologies including HLS, HSS,

HDS, and MPEG-DASH over the Internet. These variations require video streaming to serve a wide variety of end-clients and to make a separate copy for each end-client type which

negatively impacts storage and bandwidth usage. In this paper, we put forward a Just-in-time Encapsulation (JITE) mechanism to overcome it. With JITE, only a single common

format representation of contents is stored and cached by the server. Upon each client request, the server will re-encapsulate the common format representation into end client

specific format to save storage and bandwidth.

Key words: adaptive bit rate videos (ABR), just-in-time encapsulation (JITE), adaptive transport streams (ATS)

李建. 自适应比特率视频流的适时封装机制[J]. 计算机与现代化.

LI Jian. A Just-in-time Encapsulation Mechanism for Adaptive Bit Rate Videos[J]. Computer and Modernization.

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