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Term:
Digital Video Broadcast   DVB

Definition:

In HM-Hierarchical Modulation, two separate data streams are modulated onto a single DVB-T stream. One stream is called HP-High Priority is embedded within a LP-Low Priority stream. For example within a 64QAM-Quadrature Amplitude Modulation, there are 6 bits for data transmission. In Hierarchical Modulation, the 2 most significant bits (first bits) would be used for mobile HP-High Priority applications and the other 4 bits for HDTV-High Definition TeleVision.



Reference to:
Reportlinker Adds DTV 2009: Declining Costs, Increasing Shipments, and Network Capability
11/20/2009

Research and Markets: Convergence in Multi-Play Networks Provides an Overview of the Current State of Multi-Play Convergent Services in Today's Environment
11/20/2009

'Ziggo negotiating still with SBS, RTL over HD'
11/19/2009

Silicon Laboratories Provides Mitsumi with Highly Integrated TV Tuner
11/18/2009

LG Innotek Adopts Fresco Microchip's Universal Demodulator
11/18/2009




Source:

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