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seminar report

Aug 17, 2014

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KRISHNA ENGINEERING COLLEGE

MOBILE TELIVISIONSUBMITTED TO:- PROF. S.B BAJPAYEE SUBMITTED BY:PRASHANT SINGH GAUTAM() RAHUL MEHROTRA()

4/4/2011

ACKNOWLEDGEMENTThis project report could not have been prepared without the help and encouragement from various people. Hence for the same reason I would like to thank my faculties and my seniors without whom this report would have been a difficult task .It was for support that I got proper guidelines preparing my presentation . I would also like to thank my parents who helped me directly or indirectlyPRASHANT SINGH GAUTAM (0816131412) RAHUL MEHROTRA(0816131)

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INDEX

1. OBJECTIVE 2. INTRODUCTION 3. MOTIVATION 4. ISSUES 5. DVB-Hy INTRODUCTION y FEATURES y IMPLEMENTATION y MARKET y EXPOSURE

6. MEDIA FLOWy INTRODUCTION

7. DMB-T 8. SUMMARY

9. CONCLUSION

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PREFACEThis project report is on the topic mobile television which sub divided into seven parts each and every par is bean deeply studied from the standard books and pages on the web for the simplicity of the reader each and every part is sub divided into headings with simple block diagrams and charts .we hope that our hard work will be appreciated by our teachers.Any suggestions for the improvement of this project report will be thankfully appreciated.

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1. OBJECTIVEAlong with the progressive digital TV broadcasting technology,TV viewing is no longer restricted by time or space; the new trend is to watch digital TV programs through wireless mobile devices. So in this report we will discuss benefits of the contemporary mobile television over conventionalmovement restricted Television.

2.INTRODUCTIONMobile TV is the wireless transmission and reception of television content video and voice to platforms that are either moving or capable of moving. Mobile TV allows viewers to enjoy personalized, interactive television with content specifically adapted to the mobile medium. The features of mobility and personalized consumption distinguish mobile TV from traditional television services. The experience of viewing TV over mobile platforms differs in a variety of ways from traditional television viewing, most notably in the size of the viewing screen.

The technologies used to provide mobile TV services are digitally based,the terms unicast and multicast are used in the same way they are used for IPTV. That is, unicasting is transmission to a single subscriber, while multicasting sends content to multiple users. These definitions also correspond to those given for similar Internetbased applications.For network operators, the challenge has become: How can largescale delivery of high-quality multimedia to wireless devices be implemented profitably?Although delivery of this type of content is technically feasible over today's existing unicast networks such as 3G, these networks cannot support the volume and type of traffic required for a fully realized multimedia delivery service (many channels delivered on a mass market scale). Offloading multicast (one-to-many) multimedia traffic to a dedicated broadcast network is more efficient and less costly than deploying similar services over 3G networks.[1]4

Hence,various mobile TV standards can be designed to optimize the delivery of mobile TV.These systems are either totally terrestrially based,completely satellite based or a combination of both.Some of the standards include Digital Video BroadcastingHandheld(DVB-H),Digital Multimedia Broadcasting(DMB),Integrated Services Digital Broadcasting-Terrestrial(ISDB-T) and Media FLO. The standards employ advanced modulation techniques such as orthogonal frequency division multiplexing and are interoperable with mobile telecommunication networks.

3.MOTIVATIONThe development of multimedia coding technologies and mobile device implementation technologies makes it possible to serve a new multimedia broadcasting service over a mobile environment. Digital multimedia broadcasting (DMB), digital video broadcastinghandheld (DVB-H), and MediaFLO were recently proposed for mobile multimedia broadcasting serviceThe performance targets of these technologies are providing VCD(video CD) quality video and FM radio quality audio. There are currently two main ways of delivering mobile TV. The first is via a two-way cellular network, and the second is through a one-way, dedicated broadcast network. Each approach has its own advantages and disadvantages. Delivery over an existing cellular network has the advantage of using an established infrastructure, inherently reducing deployment costs. At the same time, the operator has ready-made market access to current cellular subscribers, who can be induced to add mobile TV to the services they buy.

The main disadvantage of using cellular networks (2G or 3G) is that mobile TV competes with voice and data services for bandwidth, which can decrease the overall quality of the mobile operators services. The high data rates that mobile TV demands can severely tax an already capacity-limited cellular system. Also, one cannot assume that existing

mobile handsets can receive mobile TV applications without major redesign and5

replacement. Issues such as screen size, received signal strength, battery power, and processing capability may well drive the mobile TV market to design hand-held receivers that provide a higher quality of voice and video than is available on most current cellular handsets.

Many 2G mobile service operators and most 3G mobile service providers are providing VOD or streaming video. These services are mainly unicast, with limited transmission capacity. They are built upon the underlying technologies used in the mobile cellular system itself GSM, WCDMA, or CDMA2000. An example of a technology designed to work on a 3G network is Multimedia Broadcast Multicast Service (MBMS), a multicast distribution system that can operate in a unicast or multicast mode. Mobile TV services over existing GSM and WCDMA cellular networks operates in the 5 MHz WCDMA bandwidth, and it supports six parallel, real-time broadcast streaming services of 128 kbit/s each, per 5 MHz radio channel.[1]

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Comparison ofVideo Services over Mobile Networks [1]

Over 3G Network Network

Over Dedicated

Network

3rd generation mobile networks

One way dedicated broadcast network .

Technology Platform MBMS MediaFLO DVB-H/SH DMB

Requires a new dual-mode handset capable of Receiver device Requires a standard 3G cellular phone receiving the broadcast signal and the cellular signal for phone calls and mobile Internet access.

Status of roll-out Relatively wide availabilityservice is available to any 3G subscriber on a network7

Limited availability in certain countries; trial stages elsewhere.

offering mobile TV Relative Limitations Cost of building a dedicated network. 3G network may not be able to support mobile TV traffic as the number of 3G voice and data users grow.

Services

Live television VOD, instant messaging

Video Production

Professional videos

4.ISSUESThree issues have been studied regarding the mobile TV system: (1) TV signal transmission technology and how to enhance TV signal fault-tolerance or increase signal transport efficiency in order to improve display quality of TV programs; (2) Mobile TV application developments and provision of personal context aware services,recommending suitable TV programs according to user habits and preferences of watching TV; (3) How to enhance display quality, provide smooth TV programming if delays occur, and reduce power consumption in mobile TV players Concerning power-saving issues, two parts are discussed:

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(1) Components of receiving TV signals, how to design receiver startup schedule while receiving a TV program signal to save receiver power; (2) Design a power-saving play mechanism according to TV program signal features, after received TV signal is converted to digital data by the demodulator. Hence, these issues can be resolved by using special dedicated networks for multimedia broadcasting on mobile TV.[3] Few of them are-: y y y Digital Video Broadcasting-Handheld (DVB-H), Digital Multimedia Broadcasting (DMB), and MediaFLO DVB-H has been identified as the mobile TV standard in most of Europe, due to its compatibility with GSM and WCDMA mobile standards. T-DMB is being used in the Republic of Korea, Indonesia and parts of Europe, and a satellite version of the technology (S-DMB) is operating in the Republic of Korea.[1]

5.DVB-H5.1 Introduction DVB-H is a broadcast/multicast technology that is a derivative of the existing DVH-T (digital terrestrial) standard, but designed for use with mobile devices.[2]Digital Video Broadcasting-Handheld (DVB-H) is based on Digital Video Broadcasting-Terrestrial (DVB-T) specification and provides a solution to lower receiver power consumption and improves mobile receiving performance. The common routes with DVB-T offer a major advantage as where there are existing DVB-T implementations adding DVB-H is cheaper than implementing a system from scratch.9

5.2 Features DVB-H is officially endorsed by the European Union as the "preferred technology for terrestrial mobile broadcasting or digital terrestrial television with additional features to meet the specific requirements of handheld, battery-powered receivers. In 2002 four main requirements of the DVB-H system were agreed: broadcast services for portable and mobile usage with 'acceptable quality'; a typical user environment, and so geographical coverage, as mobile radio; access to service while moving in a vehicle at high speed (as well as imperceptible handover when moving from one cell to another); and as much compatibility with existing digital terrestrial television (DVB-T), to allow sha

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