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The MPEG-DASH Standard for Multimedia Streaming Over the Internet . 王鑫宇 11222017. W atching the Olympics live over the Internet? S treaming last week’s episode of your favorite TV show to your game console ? W atching a 24-hour news TV channel on your mobile phone? . Contents.
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The MPEG-DASH Standard for Multimedia Streaming Over the Internet 王鑫宇11222017
Watching the Olympics live over the Internet? Streaming last week’s episode of your favorite TV show to your game console? Watching a 24-hour news TV channel on your mobile phone?
Contents • Background • Adaptive streaming • Scope of MPEG-DASH • Features & Advantages • My opinion
Background • Multimedia streaming over the Internet infancy • No interoperability devices and servers • Video content vast majority of Internet traffic • Market growth PCs, TVs, tablets, and mobiles phones • MPEG-DASH (Dynamic Adaptive Streaming)
HTTP streaming ···
HTTP streaming • Apple’s HTTP Live Streaming • Microsoft’s Smooth Streaming Adobe’s HTTP Dynamic Streaming
Features & Advantages • MPEG-DASH defines segment-container formats for both ISO Base Media File Format and MPEG-2 Transport Streams. • MPEG-DASH is media codec agnostic and supports both multiplexed and unmultiplexed encoded content. • Multiple DRM and common encryption ISO/IEC 23001-7 • Five specific profiles for different applications.
Additional features • Switching and selectable streams. • Ad insertion. • Compact manifest. • Fragmented manifest. • Segments with variable durations. • Multiple base URLs. • Clock-drift control for live sessions. • …...
My opinion • 灵活性是 MPEG-DASH 的最大优点,同时也是它的缺点所在,适应该协议的客户端复杂 • 应规定客户端的自适应判决方案,最大化网络带宽利用率 • 自适应的同时考虑 QoE • 与设备制造商、应用软件商合作