It is the latest development within the set of DVB transmission standards. DVB-H technology adapts the successful DVB-T(Digital Video Broadcasting - Terrestrial) system for digital terrestrial television to the specific requirements of handheld, battery-powered receivers. DVB-H can offer a downstream channel at high data rates which can be used standalone or as an enhancement of mobile telecoms networks which many typical handheld terminals are able to access anyway

[Figure 1. The Concept of DVB-H]
Users can use DVB-H services through various kinds of handheld terminals such as mobile phones, laptop computers and in-car devices. And the main equipment is mobile phone
- Mobile phone 　

[Figure 2. Nokia 7700 Terminal]
[Figure 3. Nokia 7710 Terminal]
[Figure 4. Nokia N92 Terminal]




[Figure 5. System architecture for collaboration between mobile and broadcast operators.]


[Figure 6. DVB-H Block Diagram.]
DVB-H is a point to multipoint standard for viewing digital TV on mobile handhelds. This standard is derived from DVB-T which is the European standard for digital terrestrial TV. DVB-H requires speeds of approximately 128 kbps to 384 kbps, making it possible to send between 25 to 80channels over one multiplex (8 MHZ/MuX), compared to 4 to 6 channels on DVB-T (Digital Terrestrial Television)services. The strength of such a technology is its point to multipoint transmission, making it possible to reach many users with a single connection at low cost/ A drawback is that a return path via a different network is required to deliver interactive services. The technology is currently being designed to operate over the DVB-T spectrum, creating competition for this scarce resource (the technologies can share MuXes)

The key of DVB-H technology is below
> Time slicing technology is employed to reduce power consumption for small handheld terminals.
> IP datagrams are transmitted as data bursts in small time slots. Each burst may contain up to 2 Mbits of data (including parity bits).
> Adding 4K-mode to satisfy mobility and SFN(Single Frequency Network).
> MPE-FEC(Multi Protocol Encapsulator-Forward Error Correction) to Improve error correction capability to add additional code.
> Extended TPS(Transmission Parameter Signaling).


The characteristic of DVB-H is below
　> Backward compatibility of previous DVB-T Transmit Network.
　> Small power consumption of terminal : below 100mW.
　> The data transmission rate is about 15Mbps in 8MHz bandwidth.
　> DVB-H can realize the wide SFN(Serial Frequency Network).
　> Customer can receive service at high speed drive.
　> Hand-over between base stations.


1. Official Site for DVB-H : http://www.dvb-h.org
2. Official Site for DVB : http://www.dvb.org
3. ETSI(European Telecommunications Standards Institute) : http://www.etsi.org
4. Wikipedia : http://en.wikipedia.org/wiki/DVB-H