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

Print

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)