Digital Television

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Index

1. Preface

3. Development

4. Conclusions

5. Bibliography

1. Preface

Remember the black and white TV …

It has been a long road. This paper introduces the new generation of television, its possibilities, advantages and important features. I invite you to join me on this journey in which I will try to prove my theories.

Towards the beginning of the 70s the Japanese came up with the idea of having the TV screen in an image quality similar to that of cinema. To solve this challenge the NHK (Nippon Hoso Kyokai) began to walk the path of high-definition television and that’s how the engineers of this company, under the direction of Dr. Takashi Fujio laid the foundation of this technology. This working group publicly demonstrated his invention at the SMPTE conference in San Francisco on February 81, and 1.984 presented to the eyes of the world the transmission system called HD analog MUSE (Multiple Sub-Nyquist Sampling Encoding ), which flipped early 1.987 using a bandwidth of 12 MHz above facts caused great alarm among the various segments of American television and the FCC was pressured to immediately initiate studies and programs needed that would safeguard the interests of the economy that would be disadvantaged by the technological advancement of Japan and that’s how the agency organized the committee in charge of the case, which was called ACATS (Advisory Committee on Advanced Television Service). The NAB NHK asked to develop a system that only occupy a bandwidth of 6 MHz, ie a normal TV channel, and the result was the emergence of the Narrow (narrow) MUSE.

The ACATS held a special panel between 8 and February 11 of 1,993 which took three major decisions, perhaps the most important was the finding that the new analog television could not, therefore, had demonstrated the Narrow MUSE which was inconvenient for the given image quality, the number of signals that could contain and coverage could give. Although this determination was made to Japanese system, the NKH continued to contribute in the development of the U.S. digital television system ATV (Advanced TV) and daughter HDTV or HDTV.

2. Introduction

Today the world is digital, and humans share and exchange information in digital formats, and digital television is a natural technological evolution of the current analog system. Allowing people to access higher quality picture and sound, as well as additional services, as required by current needs.

As I said the current TV is analog, this implies that the video and audio signals, such as are generated in the source station is spread through the air, using radio waves, to be received by users. In the case of digital television these video and audio signals are digitized and can thus be compressed. With this compression, transport of signals to the end user (viewer) is performed digitally.

Introduction to the problem.

Detection of the problem:

This paper will address the issue of implementation of the new system of television signal transmission in Argentina.

ID beforehand:

By this time our country is faced with the need to define standards to be established for the transmission of TV signal. Having taken a hasty decision in determining the standard ATSC (U.S. standard.) May require us to be separate from the world again, or at least the continent.

Presentation of problems.

Making decisions about the digital television system by any country is not a simple task. Apart from the technical, economic and social decisions that entails must be addressed to the degree of importance and relevance to the same demand.

The government of Argentina, Ministry of Communications, spoke out about it in 1998, setting a standard ATSC (Advanced Television System Committee) originally developed in the U.S.. Currently neighboring countries: Brazil and Chile took different decisions, they chose the DBV standard (Digital Video Broadcasting) developed in Europe. This will again be positioned as in the context of determination of the PAL-N standard TV.

Degree of progress on current knowledge of the subject.

Brazil’s decision is about to be taken and likely influence the decisions they can make the other countries in the region. Although Argentina and took the option for ATSC, it remains questionable, and some television channels are testing the two systems. Each other with ATSC and DVB. This trial seems to be awaiting the final decision of Brazil.

Note that in the case of Mexico, which shares a long border with the United States, not only geographically but also commercial, we are studying the possibility of merging the two systems in order to end the debate about the performance of each . This Solomonic decision, we would share the advantages of both, in addition to an early solution to the issue, a decision that would save time in the implementation of a digital television system for this country, and that inevitably would force an early solution to the debate in Central American countries.

Abert Group Reports / Set, (a body established by the Brazilian Association of Radio and Television ABERT, and the Brazilian Society of Television Engineering SET), responsible for conducting performance tests of the three systems that exist discount the market today: ATSC, of American origin, DVB-T, its European equivalent and ISDB-T, from Japan, yielded findings that suggest the adoption of a different system to the American system. In these tests involved 17 companies in the public and private sectors, with the support of the University Mac Kenzie, who through an agreement with the Group was responsible for the implementation of a measurement laboratory and performing laboratory tests.

Since then, the experiences we have accumulated countries such as Mexico and Chile, and providing ongoing information to organizations that promote either system are fundamentals that serve north to the other countries of the region in the trial, about the adoption of a digital television system.

Determination of the problem.

Reference systems.

References are obtained U.S.. , European Community and Japan.

Limitations of the research.

Features and performance in the U.S.. Europe and Argentina.

Hypothesis.

The current system of television in Argentina would allow the implementation of the new technology of digital television (HDTV).

Variables selected.

AND Primary Outcome:

System features Argentine television are highly compatible with the European standard of digital television (DBV).

a. Secondary variable:

The TV system in Argentina.

c. Secondary variable:

TV channels and cable systems Argentines.

l. Secondary variable:

Digital TV standards in Europe.

z. Secondary variable:

Digital TV Standards in the U.S..

. Secondary variable:

Compatibility between Argentine television system and Europe.

Theoretical framework.

The theoretical framework is available in codes written by committees of U.S. broadcasting. and Europe. These state departments keep this information available on the Internet and it is there that got everything you need to develop this work.

Methodology.

It will use the scientific method in general, the structure variables generating inductive-deductive, a hypothesis formation mechanism and demonstration the following logical structure:

* Detection of the problem.

* Formalizing the problem.

* Determination of the hypothesis.

* Identification of the primary (quantification of the hypothesis).

* Identification of the secondary endpoints.

* Checking the variables.

* Transformation of variables in premises.

* Construction of demonstrative syllogistic structure with structure “B-tree”.

Importance of the problem, aims and objectives.

The relevance of the problem presented is soaring, as a country we are facing a new dilemma that can condemn a severe regional isolation that threatens our cultural and social development. The purpose of this paper is to show that you can choose another option in regard to television transmission standard.

3. Development

Variables Development

a. Secondary variable:

The TV system in Argentina.

c. Secondary variable:

TV channels and cable TV systems Argentines.

l. Secondary variable:

Digital TV standards in Europe.

z. Secondary variable:

Digital TV Standards in the U.S..

. Secondary variable:

Compatibility between Argentine television system and Europe.

Structure demonstrative.

Reasoning

Premise to:

The current TV system meets international standards for analog television. Radio waves are sent audio and video via satellite transmitters located on floors and relayed by repeaters throughout the country. This system has been used since the 1950s to the present.

Premise b:

The cable TV system was introduced in the late 80’s in the country and featured prominently in the programming lineup. He started with the company VCC (Video Cable Communication) possessed three self-produced channels transmitting over the air channels of the Federal Capital. He eventually proposed adding up to the year 1997 with 70 national and international channels via satellite. Today in the country more than 40 cable TV companies covering the entire country with a high population density, so high that we are among the top 5 countries in the world in terms of percentage of number of subscribers on the total population. The cable TV system in Argentina is currently migrating its copper cabling to fiber optics, dramatically improving the quality of picture and sound.

Reasoning B:

Premise e:

The European digital TV standard DVB-T offers proven and used in many countries of the Old Continent where

prevail more varied topographies, including developments include cable and satellite television, along with the recent launch of MHP (Multimedia Home Platform), designed to meet the convergence between broadcasting, telecommunications and information technology. In short, this rule was created to offer the possibilities of interactive television and electronic commerce.

Premise h:

The American ATSC standard, concentrates its strengths in terrestrial transmission over long distances and advanced development for fixed HDTV transmissions. It has the strengths of the other mobile transmission systems, attractive business niche for television hopefully awaiting the opportunity to expand and extend its commercial and service options through new media.

Z Conclusion:

Since the cable television system in Argentina is less developed, and their networks make it along almost the entire country, is the European standard for digital TV that best suits our infrastructure.

Logical structure.

Formalizing the demonstration

Secondary Variable a => Premise to

Secondary variable c => b Premise

a + b = Reasoning

Secondary variable l => Premise and

Secondary variable z => Premise h

e + h = Reasoning B

Reasoning Reasoning A + B = Conclusion Z

Generation of new research.

The case is open. It can deepen each of the standards selected for this study and through recursion, stopping at each subsystem discussed here.

Surely the advent of MPEG 4 will cause inconvenience to the two systems and will have to introduce new instructions and directions within the syntax used in the programming of each of the data streams from the unit to the carrying multiple programming with various services within the same flow as interactivity, external data, audio in different languages, and other services that will transit information highways in the same container as the Internet, telephone, radio, and other media. So this may be one of the research topics in the near future.

Transfer of results.

The results will be published in various Internet sites of interest such as:

Monografas.com; Rincondelvago.com; deptocomputacion.net. It will also be delivered to the National Communications Commission (NCC).

4. Conclusions

The findings of this evaluation process were:

* That the ATSC system does not meet the minimum needs technically for the preservation of the broadcasting of sounds and images in Argentina, mainly due to its low robustness over long distances and low flexibility, compared to DVB-T.

* DVB-T system is able to meet both the requirements to improve or at least replicate the reception of the current analog channels, allowing the transport of HDTV signals, in addition to adding new applications for local broadcasters.

* ISDB-T system is significantly superior DVB-T both as regards to immunity to impulse noise, as well as in performance for mobile reception, important to ensure the competitiveness of the broadcasting of sounds and images in the future, and offer application flexibility.

* Despite the technical superiority and flexibility of ISDB-T, it is necessary to consider other aspects such as the impact that the adoption of each system will have on the domestic industry, the conditions and facilities of each system implementation, deadlines for commercial availability, the price of consumer receivers, the expectation of a fall in commodity prices, so that enables faster access to all sections of the population.

* All systems have strengths and weaknesses that not disqualified but who should be tested under specific conditions to determine which may be the best for one country or another. This does not mean that each country find the option for himself and that this process happen again things like that led to countries such as Argentina and Brazil, in an analog TV system PAL-M not found in other countries, at least in America.

Finally, the author believes that after the foregoing hypothesis:

The current system of television in Argentina would allow the implementation of the new technology of digital television (HDTV). It is formally proven.

5. Bibliography