12-05-2011, 10:05 AM
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ABSTRACT
IPTV - Internet protocol television - refers to the delivery of digital television and other audio and video services over broadband data networks using the same basic protocols that support the internet.
IPTV describes a system capable of receiving and displaying a video stream encoded as a series of Internet Protocol packets. In this paper, let us first define an Internet Protocol Television (IPTV), the difference between traditional cable TV and IPTV and the service providers of IPTV.
INTRODUCTION
The home continues to grow more digital with each new round of technologydevelopment. Consumers add MP3 players, set-top boxes (STBs), personal video recorders (PVRs), digital cameras, and HDTVs to their cache of digital entertainment devices.
They create wireless home networks to connect their components to each other and to a new generation of multimedia STBs, desktop PCs, and laptop PCs designed for the digital home.
IPTV (Internet Protocol Television) is a system where a digital television service is delivered using the Internet Protocol over a network infrastructure, which may include delivery by a broadband connection.
IPTV is typically supplied by a broadband operator using a closed network infrastructure. This closed network approach is in competition with the delivery of TV content over the public Internet.
What is IPTV?
Internet Protocol Television (IPTV) is the delivery of broadcast-quality television and/or video signals to subscribers over a broadband connection using the Internet Protocol (IP). IP is simply the protocol or technology that enables you to access the Internet. IP-delivered television content is delivered using this technology. IPTV, unlike Internet TV, is primarily a TV experience rather than a PC experience and is meant as an alternative to cable and satellite.
WHY IPTV?
The `IP’ in its name stands for internet protocol and refers to a method of sending information over a secure, tightly managed network that results in a superior entertainment experience. Building IPTV capability into a network allows a service provider to deliver voice and data as well.
IPTV vs CABLE TV
Cable TV is a one-way communication. IPTV provides for a two-way communication.
IPTV provides interactive programmes such as Video on demand (VOD), gaming and many more.Whereas, there are no interactive programmes in cable TV.
traditional cable TV has the capacity to deliver hundreds of channels simultaneously to each subscriber. This creates limitations on the number of channels offered and can contribute to bandwidth shortages and quality degradation. IPTV, by contrast, sends only one programme at a time.
In traditional cable TVs video is transmitted by the local operators whereas in an IPTV, voice, video and data are transmitted by the telcos.
WHO WILL BE THE IPTV SERVICE PROVIDERS?
Large telecom companies and others into the business of providing broadband access will offer IPTV services. Many of the world’s major telecom providers are exploring IPTV as a new revenue opportunity from their existing markets.
HOW IT WORKS?
The venerable set-top box, on its way out in the cable world, will make resurgence in IPTV systems. The box will connect to the home DSL line and is responsible for reassembling the packets into a coherent video stream and then decoding the contents. Most video enters the system at the Telco’s national head end, where network feeds are pulled from satellites and encoded if necessary.
The video streams are received by a local office, which has the job of getting them out to the folks on the couch. This office is the place that local content (such as TV stations, advertising, and video on demand) is added to the mix.
All the channels in the lineup are multicast from the national head end to local offices at the same time, but at the local office, a bottleneck becomes apparent.
When a user changes the channel on their set-top box, the box does not "tune" a channel like a cable system
TYPICAL IPTV CONFIGURATION:
A typical IPTV configuration from the digital subscriber line access multiplexer (DSLAM) to the customer premises is shown in figure. As shown, the video stream is delivered using ADSL2+ from the IP-based DSLAM to the user’s ADSL2+ broadband router.
SAMPLE DIAGRAMS AND DESCRIPTIONS:
IPTV VIDEO SYSTEM:
This shows how a basic IP television system can be used to allow a viewer to have access to many different media sources. This diagram shows how a standard television is connected to a set top box (STB) that converts IP video into standard television signals. The STB is the gateway to a IP video switching system.
This diagram shows that the user only needs one video channel to the SVS to have access to virtually an unlimited number of video sources.
IPTV PROGRAM DISTRIBUTION:
This shows how an IP television system can distribute information through a switched telephone network. This example shows that end users who are watching a movie that is initially supplied by media center that is located some distance and several switches away from end users (movie watchers). When the first movie watcher requests the movie, it is requested from the telephone end office.
DSL SERVING PREP FOR IPTV:
This shows how the number of simultaneous IP television users per household geographic serving area can vary based on the data transmission capability of the service provider. This example shows that each single IP television user typically requires 3 to 4 Mbps of data transfer. For a telephone system operator that uses distance sensitive DSL service, this example shows that the service provided will be limited to providing service to a single IP television when the data transfer rates are limited to 3-4 Mbps.
APPLICATIONS OF IPTV:
Digital Broadcast TV
Video on Demand (VoD)
Global Television Channels
Personal Media Channels (PMC)
In Business
ADVANTAGES OF IPTV:
Interactivity among Internet, Video & Voice
Numerous channels
Provides web-based training
Report to the operator: Quadruple pla
DISADVANTAGES OF IPTV:
There are some limitations to IPTV. IPTV is based on the Internet Protocol, it is sensitive to packet loss and delays if the IPTV connection is not fast enough and it also does not support HDTV at the moment.
PRIVACY AND SECURITY:
In this regard, the home network must be a closed one. It should be a secure network where access is limited only to users and concerned devices within the home. This is an important factor for the home networks as it uses wireless technologies.
CONCLUSION:
In the future, IPTV is likely to be standard in tens of millions of population. As a result, the market is going to demand new innovative applications, end-to-end solutions and much more. The possibilities opened up really are limitless. With technology like this, it’s no wonder that IPTV will be the TV usable by all societies of the world.
[attachment=13610]
ABSTRACT
IPTV - Internet protocol television - refers to the delivery of digital television and other audio and video services over broadband data networks using the same basic protocols that support the internet.
IPTV describes a system capable of receiving and displaying a video stream encoded as a series of Internet Protocol packets. In this paper, let us first define an Internet Protocol Television (IPTV), the difference between traditional cable TV and IPTV and the service providers of IPTV.
INTRODUCTION
The home continues to grow more digital with each new round of technologydevelopment. Consumers add MP3 players, set-top boxes (STBs), personal video recorders (PVRs), digital cameras, and HDTVs to their cache of digital entertainment devices.
They create wireless home networks to connect their components to each other and to a new generation of multimedia STBs, desktop PCs, and laptop PCs designed for the digital home.
IPTV (Internet Protocol Television) is a system where a digital television service is delivered using the Internet Protocol over a network infrastructure, which may include delivery by a broadband connection.
IPTV is typically supplied by a broadband operator using a closed network infrastructure. This closed network approach is in competition with the delivery of TV content over the public Internet.
What is IPTV?
Internet Protocol Television (IPTV) is the delivery of broadcast-quality television and/or video signals to subscribers over a broadband connection using the Internet Protocol (IP). IP is simply the protocol or technology that enables you to access the Internet. IP-delivered television content is delivered using this technology. IPTV, unlike Internet TV, is primarily a TV experience rather than a PC experience and is meant as an alternative to cable and satellite.
WHY IPTV?
The `IP’ in its name stands for internet protocol and refers to a method of sending information over a secure, tightly managed network that results in a superior entertainment experience. Building IPTV capability into a network allows a service provider to deliver voice and data as well.
IPTV vs CABLE TV
Cable TV is a one-way communication. IPTV provides for a two-way communication.
IPTV provides interactive programmes such as Video on demand (VOD), gaming and many more.Whereas, there are no interactive programmes in cable TV.
traditional cable TV has the capacity to deliver hundreds of channels simultaneously to each subscriber. This creates limitations on the number of channels offered and can contribute to bandwidth shortages and quality degradation. IPTV, by contrast, sends only one programme at a time.
In traditional cable TVs video is transmitted by the local operators whereas in an IPTV, voice, video and data are transmitted by the telcos.
WHO WILL BE THE IPTV SERVICE PROVIDERS?
Large telecom companies and others into the business of providing broadband access will offer IPTV services. Many of the world’s major telecom providers are exploring IPTV as a new revenue opportunity from their existing markets.
HOW IT WORKS?
The venerable set-top box, on its way out in the cable world, will make resurgence in IPTV systems. The box will connect to the home DSL line and is responsible for reassembling the packets into a coherent video stream and then decoding the contents. Most video enters the system at the Telco’s national head end, where network feeds are pulled from satellites and encoded if necessary.
The video streams are received by a local office, which has the job of getting them out to the folks on the couch. This office is the place that local content (such as TV stations, advertising, and video on demand) is added to the mix.
All the channels in the lineup are multicast from the national head end to local offices at the same time, but at the local office, a bottleneck becomes apparent.
When a user changes the channel on their set-top box, the box does not "tune" a channel like a cable system
TYPICAL IPTV CONFIGURATION:
A typical IPTV configuration from the digital subscriber line access multiplexer (DSLAM) to the customer premises is shown in figure. As shown, the video stream is delivered using ADSL2+ from the IP-based DSLAM to the user’s ADSL2+ broadband router.
SAMPLE DIAGRAMS AND DESCRIPTIONS:
IPTV VIDEO SYSTEM:
This shows how a basic IP television system can be used to allow a viewer to have access to many different media sources. This diagram shows how a standard television is connected to a set top box (STB) that converts IP video into standard television signals. The STB is the gateway to a IP video switching system.
This diagram shows that the user only needs one video channel to the SVS to have access to virtually an unlimited number of video sources.
IPTV PROGRAM DISTRIBUTION:
This shows how an IP television system can distribute information through a switched telephone network. This example shows that end users who are watching a movie that is initially supplied by media center that is located some distance and several switches away from end users (movie watchers). When the first movie watcher requests the movie, it is requested from the telephone end office.
DSL SERVING PREP FOR IPTV:
This shows how the number of simultaneous IP television users per household geographic serving area can vary based on the data transmission capability of the service provider. This example shows that each single IP television user typically requires 3 to 4 Mbps of data transfer. For a telephone system operator that uses distance sensitive DSL service, this example shows that the service provided will be limited to providing service to a single IP television when the data transfer rates are limited to 3-4 Mbps.
APPLICATIONS OF IPTV:
Digital Broadcast TV
Video on Demand (VoD)
Global Television Channels
Personal Media Channels (PMC)
In Business
ADVANTAGES OF IPTV:
Interactivity among Internet, Video & Voice
Numerous channels
Provides web-based training
Report to the operator: Quadruple pla
DISADVANTAGES OF IPTV:
There are some limitations to IPTV. IPTV is based on the Internet Protocol, it is sensitive to packet loss and delays if the IPTV connection is not fast enough and it also does not support HDTV at the moment.
PRIVACY AND SECURITY:
In this regard, the home network must be a closed one. It should be a secure network where access is limited only to users and concerned devices within the home. This is an important factor for the home networks as it uses wireless technologies.
CONCLUSION:
In the future, IPTV is likely to be standard in tens of millions of population. As a result, the market is going to demand new innovative applications, end-to-end solutions and much more. The possibilities opened up really are limitless. With technology like this, it’s no wonder that IPTV will be the TV usable by all societies of the world.
