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We live in the age of the digital packet. Documents, images, music, phone calls all get chopped up, propelled through networks, and reassembled at the other end according to Internet protocol. So why not TV? Today, IPTV (Internet Protocol Television) is creating headlines all over the world. This mass publicity is the result of numerous instances and stories depicting its humble deployments and its future. IPTV is a very useful system, through which you can receive both TV and video signals along with other multimedia services by means of your Internet connection. In nutshell, it is nothing but a broadband connection and a system to deliver various programs of television using the Internet protocol (i.e., language) over computer networks. It is important to remember that IPTV is not like any ordinary television program broadcast through the Internet, but rather it is unique in itself. Its contour is represented by a closed, proprietary TV system which is similar to the cable services present today. But, in contrast, the delivery of IPTV is made via IP-based secure channels, which result in a sharp increase in content distribution control. It is important to remember that IPTV is not like any ordinary television program broadcast through the Internet, but rather it is unique in itself. Its contour is represented by a closed, proprietary TV system which is similar to the cable services present today. But, in contrast, the delivery of IPTV is made via IP-based secure channels, which result in a sharp increase in content distribution control.
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INTERNET PROTOCOL TELEVISION (IP-TV)
Presented by: Anil Kumar Mahapatra
Registration No. 0901304102
Electronics and Communication Engineering
Gandhi Institute of Technology and ManagementBhubaneswar
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CONTENTS INTRODUCTION
EVOLUTION OF BROADCASTING TECHNOLOGY
THE ORIGIN OF IP-TV
TECHNOLOGY USED IN IP-TV
EXTENSION OF ADSL TO IPTV
IP-TV NETWORK ARCHITECTURE
COMPRESSION TECHNOLGY
SERVICES & USER EXPERIENCE
ADVANTAGES & IMPACT OF IP-TV
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ABOUT TELEVISION
Historic view-TV transmission from towers, distribution over a cable n/w or beamed directly from Satellite (VSAT).
Modern view-TV, Telephone services & high speed internet access will be delivered over present broadband DSL Network on a single connection.
MODES OF TV TRANSMISSION
Television (TV): Specifies the medium of communication that operates through the transmission of information to the users as pictures and sounds for their interpretation &entertainment.
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TYPES OF TRANSMISSIONSMULTICASTING- A multicast stream is sent to a multicast group internet address. When a user selects a live channel, a request to join the group of viewers associated with the relevant multicast address is sent from the set top box to the equipment in the local telephone exchange.
UNICASTING- A video-on-demand service is unique to each viewer & delivered as a unicast stream. It is sent to a single internet address in response to a request from the receiver.
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Evolution [of the TV]
Mechanical Televisor7:3 aspect ratio
1884-1928 1935
Electronic TV4:3 aspect ratio
1953
NTSC ColorStandard
2000
Digital, HDTV16:9 aspect ratio
2006
IPTV
t
IPTV ≠ Evolution –> IPTV = Redefinition of “Broadcast”
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THE ORIGIN OF IP-TV
IP-TV
CABLE(VIDEO)MEDIA
TELCO(VOICE)
TELECOM
ISP(DATA)
IT
A TRIPLE PLAY SERVICE
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DEFINITION OF INTERNET PROTOCOL TELEVISION (IP-TV)
IPTV essentially has two components:
1. Internet Protocol (IP): specifies the format of packets and the addressing scheme. The protocol establishes a virtual connection between a destination and a source. IP allows you to address a package of information and drop it in the system, but there’s no direct link between you and the recipient.
2. Television (TV): specifies the medium of communication that operates through the transmission of pictures and sounds. We all know TV, but here we are referring to the services that are offered for the TV, like linear and on-demand programming.
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TECHNOLOGY USED IN IP-TV
1.BROADBAND – THE KEY ELEMENT
As Per The Telecom Regulatory Authority of India (TRAI): “An always-on data connection that is able to support interactive services, and has the capability of minimum download speed of 256 kbps”
Note: This definition for throughput may undergo up gradation in the future.
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TECHNOLOGY USED IN IP-TV2. xDSL – xDIGITAL SUBSCRIBER LINESxDSL Family Tree
Symmetric DSL:Provide identical data rates upstream & downstream
Asymmetric DSL:Provide relatively lower rates upstream but higher ratesdownstream
Four main variations of xDSL exist:ADSL-Asymmetrical Digital Sub’s LineHDSL-High bit/data rate Digital Sub’s LineSDSL- Symmetric Digital Sub’s LineVDSL-Very-high-data-rate Digital Sub’s Line
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DIFFERENT xDSL STANDARDSType Max speed
Downstream (Mbps)
Max speed Upstream
(Mbps)
ADSL 8 1.0
ADSL2 12 3.5
ADSL2+ 24 3.5
VDSL 52 12
VDSL2 100 100
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BASIC ARCHITECTURE OF ADSL
Image Courtesy: www.btcpl.net
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EXTENSION OF ADSL TO IP-TV
SplitterADSLMODEMRJ 11 RJ 11
RJ 11
RJ 11
RJ 45
Line
Single User with Voice and Data
Splitter ADSLMODEM
STB
RJ 11 RJ 11
RJ 11 RJ 45 RJ 45
RJ 45
AV Port
Single User with Voice, Data and Video
Line RJ 11
SplitterADSLMODEM
Switch
Multi user BusinessCustomer
Line
RJ 11 RJ 11RJ 11
RJ 45
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ADSL Splitter
ADSL Modem
IPTV Set Top Box (STB)
Internet
Voice service
Video
Landline
TRIPLE PLAY SETUP USING ADSL MODEM & SPLITTER
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highpassfilter
LINEDSL
lowpassfilter
TELE
Splitter1. Separates the 300 Hz to 3500 Hz voice channel from upstream and downstream channels2. Reduces traffic congestion3. Pass voice, dial tone, ringing and on/off hook signals4. Consists of a low pass filter (LPF) for
POTS and a high pass filter (HPF) for upstream/downstream channels.5. Passive device
ADSL SPLITTER BLOCK DIAGRAM & FUNCTIONS
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IP – TV NETWORK ARCHITECTURE
Image Courtesy: www.althos.com
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COMPRESSION TECHNOLOGY USED IN IP - TV1. H.264 is mainly used.
2. It has 50% more compression efficiency as compared to MPEG-2.
3. Picture quality is retained at low bit rates.
4. It enables the broadcast of HD over IPTV.
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H.264 MPEG2
Computationally demanding
Computationally less demanding
Supports HDTV Transmission
Supports SDTV Transmission
Resolution of 2000,000 pixels
Resolution of 210,000 pixels
Broadcast in 16:9 format Broadcast in 14:3 format
COMPARISION BETWEEN H.264 AND MPEG2
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Content Services in IP - TV Triple Play Broadcast type
IPTV Pay TV Hi-Fi Radio Electronic Programme Guide
(EPG) Multicast Streaming Live Streaming for VOD Progressive Downloads(Video,
gaming, music downloads)
On Demand type Interactive VOD Scheduled Play-out( n-VOD) Scheduled Capture ( n-PVR) Client side Personal Video
Recording Pay per View(PPV) Games on Demand Time Shifted TV Others ( Music Download, Music
on Demand, Karaoke on Demand, TV based internet access, caller ID pop up)
Interactive type Interactive TV Video Conferencing Interactive Online Network
Gaming Interactive E-Learning Interactive E-Shopping Tele-Medicine
Internet and Voice types VoIP Browsing on TV E-mail/SMS/MMS from TV Caller ID Popup
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Recommendations, Rating, Time Boxing a Guide That Actually Guides You!
User Experience
(Image Courtesy: www.microsoft.com)
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ADVANTAGES OF IPTV
Traditional TV Distribution IPTV
Proprietary STB lease Proprietary systems Tied to single STB vendor technology
roadmap
Cheaper STB Scale efficiencies and merchant
components will ensure cheaper devices and better availability
Thin client will be embedded in various devices (such as XBox)
Broadcast architecture No 1:1 potential without monumental
upgrade cost Video delivery separate from data Difficult to integrate with Web/PC content
and services.
1:1 communication will enable Targeted custom TV services and
commerce Collection of usage data Simplified integration of IP content and
services (ITV - weather, games, photos, music etc. on TV)
Little or no interoperability TV integrated with broadband home devices
The IP STB is the TV’s gateway to digital music, home videos and photos
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IMPACT OF IP - TVBandwidth Requirements
New compression technologies reduce bandwidth required.
Global DevelopmentGlobal demand speeds innovation and drives down the cost curve.
Deployment CostsNew distribution architectures allow delivery of higher
bandwidth at a lower cost.
Growth PotentialThese developments create video and consumer data growth opportunities
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REFERENCESWEB REFERENCES:
http://www.faqs.org
http://www.btcpl.net/
http://en.wikipedia.org/wiki/IPTV
http://www.althos.com
http://www.microsoft.com
BOOKS:
Next Generation IPTV Services and Technologies By Gerard O'Driscol
Understanding IPTV By Gilbert Held
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