Slide1

An Overlay Multicast Infrastructure for Live/Stored Video Streaming Visual Communication Laboratory Department of Computer Science National Tsing Hua University

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Live Video Broadcasting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Service Architecture Encoder Stream Server (VOD) Storage Internet (VOD) (Live Broadcast ) Stream Server ( Live )

Multicast Routing Tree Client A (10:00) Client B (10:00) Client C (10:00) Client D (10:00)

Common Solution: Prefix Caching ,[object Object],[object Object],4 1 2 3 Prefix cache C 1 1, 2, 3, 4 5, 6, 7, …

Multicast + Prefix Caching Client A (10:00) Client B (10:00) Client C (10:00) 5 min (10:05) queue the stream (10:10) read data from the buffer Client D (10:05) 5 min store the first 5 min

Limitations ,[object Object],[object Object],[object Object],[object Object],[object Object]

Scenario: Request & Playback ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Request flow EPG meta data peer 1 peer 0 peer 2 Search P2P Player input : service mode query rules peer 3 peer 4 distributed query init multicast video stream

Topics in this project ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Advanced Topics (?) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Our Previous Works ,[object Object],[object Object],[object Object],[object Object],[object Object]

On-Demand Multicast Communications 10:00 10:00 10:00 10:00 10:00 10:00 10:00 10:00 10:00 10:02 10:03 10:04 Source Node with timing control 10:04 10:01 10:02 10:03 10:02

Interval Caching ,[object Object],Caching buffer 4, 3, 2, 1 1 1 5, 4, 3, 2, 1 2, 1 1 4 3 2 2 5 4 3 C 1 10:00 C 2 10:04

Timing Control Mechanism 10:00 10:03 10:00 3 4 5 6 7 To player D, 10:05 To player B, 10:00 2, 1 7, 6, 5, 4, 3, 2, 1 10:05 4, 3, 2, 1 To player C, 10:03

On-Demand Multicast Routing source 10:00 Network ,[object Object],[object Object],[object Object],10:02 10:03 10:06 10:06 10:08

Playback (with Directory Server) directory server module.exe IE Client Proxy Source module.exe 1 2 3 4 5 6 7 8 WWW

Playback (Peer-to-Peer) ,[object Object],[object Object],[object Object],source … … … client P i P j P s 10:00 10:02

P2P v.s. Proxy Platform IP Networks Virtual File System (Media Query) (Information Delivery) Video Streaming (HTTP) Media Player QoS IP Networks Cache Replacement Network Mgmt. Proxy-Based Peer-to-Peer Selection & Chaining Proxy Video Streaming (HTTP) Media Player ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Fault Handling Source 11:30 11:40 11:43 11:44 11:30 11:40 One of the clients faults Auto reconfiguration 11:33 11:34 11:35 11:32

Heterogeneous Network Bandwidth Server 1.5 Mbps 0.8 Mbps 1.5 Mbps 0.8 Mbps 0.7 Mbps aggregated stream 0.8 Mbps low quality 1.5 Mbps High quality Bottleneck = 0.7 Mbps

End-to-end Layer Subscription with Bandwidth Constraint … Layer 1 Layer 2 Layer L Scheduler Lossy Channel Sender Decoder with Error Concealment Receiver

GUI (Media Player) filename number of layers

Slide1

Recommended

Recommended

More Related Content

Similar to Slide1

Similar to Slide1 (20)

More from Videoguy

More from Videoguy (20)

Slide1