Deploying HDTV

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Deploying HDTV

• Implementation and Challenges

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Implementation

• Satellite broadcasters
• Specialized receivers required
• Higher bandwidth requirements
• Different Satellite typically from standard
  programming
• Limited programming at this time
• All digital signal from reception to transport

3
Implementation

• Off Air Broadcasters
• 8VSB demodulators required
• Off air impairments, noise, signal quality, etc.
• Specialized equipment required for transmission
  into cable system
• Rate muxing equipment required to combine signals
  and rate shape streams

4
Headend

• Site survey required for Antenna and Dish
  placement for reception equipment if needed.
• Rack space required for reception equipment and
  rate shaping equipment if required.
• Digital transport equipment to customer set top.

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Headend ScenariosScientific Atlanta
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Headend ScenariosMotorola
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Challenges

• Number of Services on each QAM Channel
• 256 QAM or 64 QAM
• Rate Shaping and Removing Null Packets from
  HDTV Signals before combining
• Customer Education and knowledge
• Receiving programming from both Broadcasters and
  Satellite.

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Transport

• RF Signal is no different than regular Digital
  cable on the system
• Troubleshooting just like Digital cable on the
  system
• Typically 2 to 4 services per QAM dependant on
  Modulation scheme 64 or 256
• Stream bandwidth at 19.2Mbps for HDTV
• Typical Digital stream at 3.75Mbps