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

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Adaptation Sets and Representations • Each Period consists of one or more Adaptation Sets. • contains alternate encodings of one or more media content components encapsulated in Representations • Representations encapsulate media streams that are considered to be perceptually equivalent • Representations are a deliverable encoded version – encapsulation in common media formats – segmentation possible for delivery optimization – concatentation of segments of one Representation complies with media format • Typically dynamic switching within one Adaptation Set 18
250 Kbps 500 Kbps 1 Mbps Segment � Process Client-Side Process Segments Advertisement Insertion 30s Period 12s Period 20s Period � Client downloads the MPD file � Client downloads segment by segment based on playout process � Bitrate determined by client Back to video � Factors relevant for Representation selection � Buffer conditions � Network conditions � User change in resolution – ex: full screen � Device activity and resources
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: Key feature - Common Timeline • R
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 and 28: Segment Index 27
Page 29 and 30: Segment and Subsegment Index for MP
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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