MPEG's Dynamic Adaptive Streaming over HTTP (DASH ...

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Media Segments • Contains the actual segmented media streams • additional information to map segment into media presentation timeline for switching and synchronous presentation with other Representations • For ISO BMFF, contains one or more movie fragments • Can be short (≈1-10 sec) and long (≈10sec – 2h) Segment duration Short Long Advantages Disadvantages • Suitable for live • for VoD commonality with live • High switching granularity on segment level • Small number of files • Small number of URLs • High switching granularity • Flexible request sizes • Improved cache performance • Large number of files • Large number of URLs • Fixed request size • switching granularity on segment level • Need for Segment Index • Difference from Live 28
Segment and Subsegment Index for MPEG-2 TS 29
Page 1: MPEG's Dynamic Adaptive Streaming o
Page 4 and 5: Video is dominating the Internet
Page 6 and 7: MPEG DASH ISO/IEC 23009-1 • MPEG
Page 8 and 9: DASH in a Nutshell • What: Video
Page 10 and 11: (Some) DASH Design Principles • D
Page 12 and 13: What is specified - and what is not
Page 14 and 15: Media Presentation Data Model • M
Page 17 and 18: Key feature - Common Timeline • R
Page 19 and 20: 250 Kbps 500 Kbps 1 Mbps Segment
Page 21 and 22: Example for Role and Viewpoint 2 vi
Page 23 and 24: Preferable Switch Points • Segmen
Page 25 and 26: Segments • ISO/IEC 23009 focuses
Page 27: Segment Index 27
Page 31 and 32: Full Profile Profiles • Set of re
Page 33 and 34: Profile identifier: ISO BMFF On-dem
Page 35 and 36: Profile identifier: ISO BMFF live T
Page 37 and 38: MPEG-2 TS simple Component Descript
Page 39 and 40: 23009-2 TEST VECTORS AND CONFORMANC
Page 41 and 42: RELATIONSHIP TO 3GPP TS26.247 DASH
Page 43 and 44: Remaining Work for 3GPP • Rel-9 A
Page 45 and 46: Typical Uses Cases • MPEG-DASH su
Page 47 and 48: DASH Promoters Group • Informal c
Page 49 and 50: HTML-5 and DASH • Continuous disc
Page 51 and 52: Some Research Challenges • Client
Page 53 and 54: Your Questions • Why is the live

MPEG's Dynamic Adaptive Streaming over HTTP (DASH ...

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