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Introduction to IPTV, VoD
Vijayant Kumar Singh
Convergence
Tripple Play = TV + Internet + Phone
Voice, Video and Data
IPTV =(IP) + (TV) ? Internet Protocol + Television
Closed and managed network IPTV is a secure closed system with
premium content and managed QoS, particularly for video
Internet TV Best effort video service
Video on demand (Push and pull)
Why IP Video?
What is IPTV? To Broadcasters,
IPTV (or broadband television) is simply “ a new emerging platform for distributing digital television channels to home consumers using a TV screen”
To Telecom Industry, IPTV is synonymous with a new opportunity
to take part in an attractive and dynamic media market
To Content Producer, A new way to reach consumers and
generate increased revenue and profits
Why IPTV ? Bandwidth efficient towards the access
network Channel switching is performed in the
network Infinite number of channels
Interactive (two-way) Bi-directional: IP Transport anything, any time, any where, any device Time Shifted TV
Signal are purely digital
IPTV Bandwidth Requirements
IPTV with MPEG-2 compression Standard Definition 3.5Mbps High Definition 19.3Mbps
IPTV with MPEG-4 compression Standard Definition 2.0Mbps High Definition 8.0Mbps
Bandwidth -Tripple play
Drivers Shaping IPTV’s Future
Typical IPTV System
IPTV Terms Relative to Normal TV
Waiting Time Delay (IPTV) Channel changing time (zapping)
Buffering QoS QoE
Understanding Delay
Propagation Delay
Processing Delay
Queuing Delay
Compression Delay
Transmission Delay
Electronic Delay
Resynchronization Delay
Decompression Delay
Presentation Delay
SENDER SIDE NETWORK RECEIVER SIDE
Delay is the amount of time that a packet takes to travel from the sender’s application to reach the receiver’s destination applicationCaused by codecs, router queuing delays, …
Components
IPTV Reference Model
Functional Architecture of IPTV
IPTV Reference Model
Functional Architecture of IPTV
General Architecture of IPTV
Service Models
Distribution Protocols
Multicast Internet Group Management Protocol
(IGMP) – Join/Leave Real Time Streaming Protocol (RTSP)
IPTV Network Distribution Technology
Through a network built with fiber Via an DSL network Via a cable TV network Via a satellite based network Via a fixed wireless broadband connection Via the Internet
Layered Multicast
Receiver-based schemes The source sends data in each layer without
regarding to network situation Receivers increase/decrease their receiving rates by
constantly join/leave a layer Coarse control
LeaveJoin
Join interval Leave intervalReceiverSource
Data
Layer 1Layer 2Layer 3Layer 4
~
1 layer = 1 multicast group
Layered Multicast
Receivers having more capacities join more layers
Receiver 1 Receiver 2
Source
Router
1Mbps 2Mbps
1Mbps1Mbps
1Mbps=2Mbps
For instance : MPEG video transmission
I frame = layer 1P frame = layer 2B frame = layer 3
Video on Demand True Video on Demand (VoD) :Each
viewer receives an individual video stream that they have complete control over. Viewers are allowed to start, stop, pause, rewind and fast-forward the content.
Network Personal Video Recorders (NPVR): Recording is performed inside the service provider’s network
Internet Video Network
IPTV Network Architecture
Video-on-Demand Architecture Evolution
IP Set Top Boxes (IP-STB) Interfaces between subscriber and IPTV service
Set Top Box (STB) Data Flow
Telco IPTV Network Hierarchy
Telco IPTV Network Architecture
Microsoft IPTV Edition 1.0
Microsoft IPTV Edition 1.1
New Technologies IPTV requires new technology in
Access networks Compression Middleware Customer premises equipment (CPE)
Improved codec, access, server, & CPE technology:
MPEG-4 AVC (H.264) next generation codec improvements
New ADSL2+, VDSL2, FTTx, DOCSIS 3.0 access technologies
IP enabled Set top Box Digital Right Management (DRM)
IPTV -“NO” Limitation Media IPTV and Broadband Multimedia
Services crosses the limitations of the Cable & Satellite medium
“PRACTICALLY NO LIMIT “ for Television/ Video content
If the Infrastructure is updated – The Robustness of IP is the Robustness of this platform
Evolution: THREE stages
Standards
End-user QoE Types Streaming QoE
End-user QoE affected just by voice and video impairments • Video frame freezing• Voice drop-outs• Lack of lip sync between voice and video
Interaction QoE End-user QoE also affected by additional interaction effort in a
conversation• “Can you repeat what you just said?”• “This line is noisy, lets hang-up and reconnect…”
QoE is measured using “Mean Opinion Score” (MOS) rankings
Seite 38Prof. J. WALTER Kurstitel: TREM Stand: März 2006
TREM History of the Media
Capturing device
Transmission
Receiver
Medium
Camera
TV
AirCable
Satellite
TV
PC
PC
WWW(Tel.netz)
Internet
Microphon
e
Radio
WaveCable
Satellite
Radio
PC
Paper
TruckTrain
Seite 39Prof. J. WALTER Kurstitel: TREM Stand: März 2006
TREM Media Today
Videoon-
demand
Print(on
demand)Web
-Radi
o
WWW(HTML)
TV(Live)
BroadbandUMTS / ADSL
IP over TV
Mediaserverz.B. IP-fähige D-Box (with hard
disc)
Cinema Working place
electronical paper
Living room
mobile device
small unit
(Telephone
Clock with
MPEG-Player)
CinemaMedium
Transmission
Receiver
Compression
Seite 40Prof. J. WALTER Kurstitel: TREM Stand: März 2006
TREM The Production
Planning the project Gathering information and producing
rough material
Capturing Creating animations, titel, metadata Assembling – Cutting – finishing
Final test Publish and distribute
Pre-production
Production
PostProduction
What is IPTV ?
IPTV – IP television (digital)– Can be part of video on demand (VoD) and triple play(voice via VoIP, video via IPTV, and data)
– Point-to-point service rather than broadcasting
ISO OSI reference model The seven layers Each layer hides complexity of lower layer Layering enforces modularity
End-to-end layer: top 4 OSI layersNetwork layer: OSI network layerLink layer: bottom 2 OSI layersA-P-S-T are implemented in softwareN-D-P are implemented in hardware
The seven layers ………….
Network layer Concatenate logically a set of links to form
an end-to-end link. Compute a route Segmentation and reassembly Unique network-wide addresses – IP
addresses The beauty of IP is that we can layer it over
any data link layer technology type-of-service in the IP
The seven layers ………….
Transport layer Create the abstraction of an error-
controlled, and flow-controlled, end-to-end link
Multiplex multiple applications to the same end-to-end connection
Port number
The seven layers …………. Best-effort network layer
- drops packets- delays packets- reorders packets- corrupts packet contents
Many applications want reliable transport- all packets reach receiver…- …in order they were sent- no data corrupted- “reliable byte stream”
Need a transport protocol, e.g., Internet’s Transmission Control Protocol (TCP)