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DTH- Rajan
 

DTH- Rajan

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a presentation slides showing whole system of direct to home technology

a presentation slides showing whole system of direct to home technology

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  • DVB-S is the original Digital Video Broadcasting forward error coding and modulation standard for satellite television. http://en.wikipedia.org/wiki/DVB-S : DVB-S is used in both MCPC and SCPC modes for broadcast network , as well as for direct broadcast satellite services like Sky Digital (UK) via Astra in Europe, Dish Network and Globecast in the U.S. and Bell TV in Canada . The transport stream delivered by DVB-S is mandated as MPEG-2 . This technology uses 11/12 GHz Frequency band.
  • To understand the type of instruments needed for confidence monitoring, we need to understand a key way digital television differs from analog television. As we see in this diagram, digital television systems use various digital signal processing and digital data processing techniques to improve quality and efficiency. Key techniques include: sampling, quantizing, and formatting the digital signal in conformance to standards using MPEG compression techniques to reduce bandwidth requirements combining multiple programs into a single stream and adding control information using digital modulation and demodulation techniques for broadcast transmission using network protocols for distribution over fiber or copper networks, and decoding and formatting the video and audio information for presentation. During the journey from source to destination, you may need to route or regenerate the signal. In the process, content may move up and down through these layers and may be remultiplexed, or may change format. We can best understand how these different processing steps interact and impact broadcast quality by organizing them into a layered model. Specifically, we can use three layers to model a digital television broadcast system. In the first layer we need to ensure the proper formatting of the digital video and audio signal, in the next layer we need to ensure these signals are correctly compressed and aggregated together, and in the last layer, we need to ensure the signals are properly distributed or transmitted.

DTH- Rajan DTH- Rajan Presentation Transcript

  • Welcome Presentation On Direct to Home Technology Presented by: RAJAN KUMAR
  • CONTENTS
    • Introduction
    • Components
    • Network
    • System architecture
    • Facility
    • Set top box
    • Different usage
    • Scenario in India
    • Conclusion
    • References
  • What is DTH ?
    • DTH is defined as:
    • The reception of satellite programs with a personal dish in an individual home.
    • DTH does away with the need for the local cable operator and puts the broadcaster directly in touch with consumer .
    • A wireless digital audio / video service is delivered through satellite.
  • MAIN COMPONENTS OF DTH
    • Broadcasting center
    • Satellites Encoders
    • Multiplexers
    • Modulators
    • DTH receivers.
  • Services uplinked to Satellites Services downlinked via receive satellite dish and fed in to STB Content “on demand” servers QPSK Modulator Real Time TV services PROCESS Enc1 Enc2 MUX
  • DTH System Architecture
    • It encompasses the uplink systems for digitizing, compressing, and transmitting multiple television programs using the DVB-S standard, for example.
    • Other elements are required for the contribution of the programs, storage and switching of video signals, and the management of DTH as a customer service .
  • Basic Elements of DTH System and Signal Flow
  • Layered Model for DTV Routing, Regeneration Distribution Sampling, Quantizing, Formatting Display Multiplexing, Fragmenting Remultiplexing Modulation, Framing and Addressing Demodulation, Delivery and Extraction Composing Format Conversion Compression Formatting Channel Reception Channel Insertion Program Compression Program Decoding
  • Receiver Receiver Multiplexer Modulator Playback & Encoding C-band transponder Ku-band transponder DTH Teleport Chain HPA Upconverter
  • MODULATION
    • Quadrature phase shift keying (QPSK)
    • Has constant envelope amplitude and widely separated phase status
    • Provides high degree of ruggedness against channel noise and interference
    • Encoded digital symbols, each composed of 2 bits, are processed by a conventional Gray – coded QPSK modulator
  • DECRYPTION BASE BAND VIDEO/AUDIO DETECTION OUT OF BAND CONTROL DATA MODUL - ATOR A V VIDEO OUT AUDIO OUT RF OUT COAX RF IN WHEN STB IS ENERGISED RELAY AT INPUT AND OUT PUT PORT CONNECTS STB CIRCUIT OTHERWISE RF SIGNAL GETS PATH TO RF OUT TO PLAY OUT FTV RELAY SCHEMATIC SHOWING FUNCTIONING OF SET TOP BOX SET TOP BOX
  • Cable Head-end Private Home Private Home Private Home DTH Receive Facility
  • Delivering Interactive TV Applications Internet Dial-Up Back Channel TCP/IP Transport Stream Data /TV/Radio Server Internet Multiplexer Content Encapsulation Content Transmission Content Presentation
    • Multimedia IP multicast seamless services
      • Full compatibility with Internet Multicast Protocols
      • News Multifeed, Web or FTP Mirroring, audio & video broadcast, MultiCache
    • Distribution to Points of Presence
      • Local ISP
      • Corporate, SME
      • Terrestrial Access network, …
    • Seamless integration
      • Standard TCP/IP data transport over DVB - S with support of UDLR RFC
      • Compatibility with LAN operations
      • Software open solutions
      • Addresses management
    FTP Servers DVB-S receiver card FTP Server DVB-S receiver card DVB-S receiver card FTP Server Multicast transmission (mirroring, FMBone, News ) Service Applications Direct To Home PCs Interne t
    • Multimedia IP multicast seamless services
      • News Multifeed, Web or FTP Mirroring, audio & video broadcast, MultiCache
    • Distribution to Points of Presence
      • Local ISP
      • Corporate, SME
      • Terrestrial access network, …
    • Seamless integration
      • Standard TCP/IP data transport over DVB - S
      • Software open solutions
    F TP Servers DVB-S receiver FTP Server DVB-S receiver card ISP, School, SME, ... End User, Kiosk, ... Multicast transmission (Best of the Web, News, ...) Service Applications
  • PLAYER’S IN D.T.H
    • DISH T.V
    • TATA SKY
    • BIG T.V
    • SUN DIRECT
    • VIDEOCON d2h
    • AIRTEL DIGITAL TV
    • D.D. DIRECT
  • GROWTH OF DTH USERS 2007 to 2015…Growth of 683 %
  • LATEST IN DTH IN INDIA Recording of TV programs remotely using mobile device.
  • Satelite LCD & DVD by Videocon DTH signal can be received by this LCD television without using any STB. STB having All the functios of a DVD player .
  • Is DTH superior to cable TV?
    • Yes.
    • DTH offers better quality picture than cable TV.
    • DTH offers stereophonic sound effects.
    • It can also reach remote areas where terrestrial transmission and cable TV have failed to penetrate.
    • Apart from enhanced picture quality, DTH also allows for interactive TV services such as movie-on-demand, Internet access, video conferencing and e-mail with return path.
  • CONCLUSION
    • DTH has made the hopes of the people of rural areas to come true .
    • DTH service in India is in initial stage delivering only TV broadcasting
    • In near future, launch of DTH internet service is expected in our country.
    • It provide the wide thinking of rural people which helps to develop the culture of society.
  • REFERENCES www.mindstein.com www.airtel.in www.tvasia.com www.wikipedia.com www.videocond2h.com Newspapers
  • ?