Elementary Flows for Live IP Production

Q3 Engineering

SMPTE Motion Imaging Journal Pub Date : 2016-03-18 DOI:10.5594/j18686

Thomas Edwards;Michael Bany

引用次数: 5

Abstract

Live Internet Protocol (IP) flows promise significant benefits in enhancing media-processing flexibility in the broadcast plant. Existing serial digital interface (SDI) formats in use today carry a multiplex of active video, ancillary data, and embedded audio over 75Ω coaxial cable. Although SMPTE ST 2022-6 encapsulates this entire SDI multiplex signal using IP, it is unclear if this is the optimal payload format for a networked broadcast plant. A large amount of wasted space exists within the ancillary area of an SDI signal. Also, system flexibility can be enhanced by placing video, audio, and ancillary data into elementary flows that can be individually and independently switched at the network layer, without the penalty of demultiplexing or remultiplexing the SDI signal. This paper describes a recommendation for the carriage of elementary media flows for live IP production, including mechanisms to describe the logical relationships between these elementary flows for composition and synchronization.

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直播IP制作的基本流程

实时互联网协议（IP）流有望在增强广播工厂的媒体处理灵活性方面带来显著好处。目前使用的现有串行数字接口（SDI）格式通过75Ω同轴电缆传输活动视频、辅助数据和嵌入式音频的多路传输。尽管SMPTE ST 2022-6使用IP封装了整个SDI多路复用信号，但尚不清楚这是否是联网广播设备的最佳有效载荷格式。在SDI信号的辅助区域内存在大量的浪费空间。此外，可以通过将视频、音频和辅助数据放置到基本流中来增强系统灵活性，这些基本流可以在网络层单独和独立地切换，而不会对SDI信号进行解复用或重新复用。本文介绍了一种用于直播IP制作的基本媒体流的传输建议，包括描述这些基本流之间的逻辑关系以进行合成和同步的机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

SMPTE Motion Imaging Journal 工程技术-成像科学与照相技术

CiteScore

0.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The SMPTE Motion Imaging Journal is the key publication of the Society, consistently ranked by our members as the most valuable benefit of their SMPTE membership. Each issue of the Journal explores a theme in great depth, with peer-reviewed technical articles from leading academics, researchers and engineers working at the top companies worldwide. You''ll expand your knowledge on topics like image processing, display technologies, audio, compression, standards, digital cinema, distribution and machine learning and much more. For additional coverage of each month''s topic, the Journal features more exclusive articles online.