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Broadcasting Systems

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Broadcasting Systems

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Broadcasting Systems

  1. 1. Broadcasting Systems Charmaine Harris
  2. 2. Broadcasting System • This is a transmission standard for public and commercial broadcasting it exhibits very long life cycles. Successful market introduction of innovations in public broadcast standards requires major investment, including the eventual replacement of receiver sets in all homes.
  3. 3. Broadcasting Systems • Several enhancements have been made over time to ensure that existing receivers in the market can continue to receive the service. Examples of enhances made are; • FM stereo audio, which is DSB modulated in the audio spectrum around 38 kHz. • AM stereo, Several systems have been proposed, but market acceptance was low. • RDS / HSDS data signals on FM subcarriers. • Teletext (in blanking intervals of TV signals) has become very popular in Europe
  4. 4. Different Types of Broadcasting Systems are…
  5. 5. Digital Video Broadcasting (DVB) • Digital Video Broadcasting is a set of standards that define digital broadcasting using existing satellite, cable and terrestrial infrastructures. • The European Launching group (ELG) formed in the early 1990s, to discuss bringing in digital television (DTV) throughout Europe. They later became the DVB project. • Today the DVB project consists of 220 organisations in more than 29 countries worldwide.
  6. 6. Analogue FM Broadcasting • When FM radio was introduced, it delivered an improvement in the sound quality than AM radio. • Despite people having the availability of different digital alternatives, like DAB, AM, Satellite radio and HD radio, FM radio is the main form of audio broadcasting.
  7. 7. AM Broadcasting • AM radio broadcasting is one of the most basic types of radio broadcasting. • An AM receiver usually detects amplitude changes in the radio waves at a specific frequency. It then amplifies a variation in the signal voltage to drive a loud speaker.
  8. 8. Teletext • Teletext is a one-way, or non-interactive system for transmission of text and graphics through broadcasting or cable to display on a television set. • When you punch in a page number on a teletext decoder, the machine waits for the page to be broadcasted. The delay depends on the number of frames that are there, it usually averages around 5 to 30 seconds.
  • PriyaGupta392

    Jun. 12, 2018

Broadcasting Systems

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