MEDIA DELIVERY TECHNOLOGIES

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Emergency Warning Broadcasting System
S.C. Khasgiwal Chief Engineer Doordarshan
IETE ANNUAL CONVENTION ,MUMBAI
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Broadcast Scenario in India

• Over 40 Mn Households Depend only on Doordarshan
  Terrestrial Transmissions
• Over 5 Mn Free To Air DTH DD Direct Plus users
• 6 Pvt. DTH Operators
• Over 82 Mn Cable Homes
• Over 60000 Cable operators and over 6000 MSOs
• Over 400 registered satellite channels

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TV Industry in India

• Size of TV Industry in 2008 4.82 Billion USD
• Projected size of TV Industry 9.46 Billion USD
• in 2013
• Projected growth 14.5

Source KPMG FICCI Report 2009
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Doordarshan Network

• 30 Digital Satellite TV Channels
• 1414 Terrestrial Transmitters
• 91.8 Population Coverage
• 66 TV Studio Centers
• Free to Air DTH Service DD Direct Plus with 59
  TV channels and 20 Radio channels
  

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DD Transmitter Network
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Doordarshan Initiatives

• Digital Terrestrial Broadcasting
• Experimental DTT service in three metro cities
• Plans to start regular service by setting up of
  30 DTT
• High Power Transmitters in major cities during
  next 3 years
• Mobile TV
• Trial DVB-H service with 16 TV channels in Delhi
• Plans for expansion on Public Private Partnership
  (PPP)
• HDTV
• Plan to start HDTV Terrestrial DTH Service

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Emergency Warning Broadcasting System

• The objective of AIR/DD is to inform educate
  and entertain in normal times
• Broadcast systems to be used for Disaster warning
  / disaster mitigation and relief operations
• Natural Calamities like floods, cyclones Tsunami.
  Earthquake, Bad weather - warning for fishermen
  about rough sea

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Outline of Public Warning System on Broadcasting

• Broadcasting have 2 functions in DM
• Gathering / Receiving info from DM agencies
• Delivering information to the public
• Outdoor receiver with loud speakers
• Difficult to hear the sound indoors
• Disaster Alerts and Info via broadcasting is
  useful for Disaster Mitigation

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Proposed Satellite Based Disaster Warning
Dissemination Systemon DD Direct DTH Platform

• In Emergency EWS Control Signal automatically
  activates the receiver equipped with EWS
  functions (even when they are on stand by mode
• EWS signal to carry area code as well as time
  code
• In digital broadcasting, the EWS signal is
  transmitted by multiplexing with broadcast wave.
  It automatically activates the receive equipped
  with EWS function.
• Cell phone also to have this receive capability
  

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Telecommunication Network for DM

• In emergency, the PSTN Network have congestion
  problem
• Important to have independent radio communication
  network

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A concept of digital EWS for mobile and portable
reception
Ref Rec. ITU-RBT.1774-1
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ITU Recommendations Emergency Warning
Broadcasting System

• Responsible agencies should prepare procedures
  and routines to send information on Public
  Warning, Disaster Mitigation and relief to
  transmitting stations or Network Distribution
  centers in accordance with agreed signal protocol
  
• The Broadcast transmitters and receivers should
  be equipped to receive material prepared by DM
  Agency
• The System for transmission and reception should
  include the possibility for forcing suitably
  equipped and suitably primed receivers (whether
  switched on or in standby mode) to present
  programme material for disaster mitigation and
  relief without intervention from the listener or
  viewer so that all citizens can become informed
  of a possible disaster within the shortest
  possible period of time with a robust mechanism
  against abuse of this feature

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Proposed Satellite Based Disaster Warning
Dissemination Systemon DD Direct DTH Platform

• Develop by DD jointly with IMD Dept. of Space
• Can disseminate WM in real time to multiple
  receive
• locations spread over large Geographical area
• Each receive location has a unique address
• Can be triggered individually or group wise

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Proposed Satellite Based Disaster Warning
Dissemination Systemon DD Direct DTH Platform
System Overview

• 5 VSATs to be installed at DW issuing centers
  of IMD
• Delhi, Kolkata, Mumbai, Chennai 1 at DD hub at
  Dehi
• Existing Hub of DMS at MHA at Nizamuddin
• Supported by EDUSAT

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Satellite based Cyclone Warning System
Source ERDC
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Proposed Satellite Based Disaster Warning
Dissemination Systemon DD Direct DTH Platform

• Head-end Software server for DWM
• 4 server at DMS - VSAT system PCs
• Located at DW issuing centers of IMD
• DVB encoder / modulator RF Transmission system
  will be integrated with DD Hub at Delhi
• DTH based DW receiver system at remote sites

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Proposed Satellite Based Disaster Warning
Dissemination Systemon DD Direct DTH Platform

• Warning Message data received through DMS Network
  at DD Hub Delhi is fed to the auxiliary data -
  in port of the existing encoder. The received
  audio out signal is also connected to an encoder
  for DVBS MPEG 2 encoding
• The warning data is sent in all the carriers as
  well as the carrier contents warning audio
  channels. The encoded warning data and audio
  channel is modulated and up-linked to the
  satellite by DD-Direct DTH uplink system.

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Proposed Satellite Based Disaster Warning
Dissemination Systemon DD Direct DTH Platform

• DW STB / IRD for receiving DTH warning
  dissemination services through satellite
• Audio / Video on TV Sets
• Audio amplifier and speaker are also incorporated
  in to the DW STB for warning dissemination

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• Thank You