TV Headend Technologies
In a digital TV headend system services are received via satellite or terrestrially broadcast are received and prepared for cable-based distribution networks.
A headend system is composed of one to several headend units. Each head unit consists of a connector system, which can be equipped with cartridge modules for each different conversions. Each cartridge module can convert one up to two programs or services.
Possible digital conversions are:
- DVB-S to DVB-C (Satellite to Cable)
- DVB-S2 (HDTV) to DVB-C (Satellite-HDTV to Cable)
- DVB-T to DVB-C (Terrestric to Cable)
- an so on
The feeding of the programs are to be implemented centrally at the head end unit and will be implemented through multi-switch chips or plug-in wiring to the individual cartridges. Each cartridge has an output converter which converts the generated output signal to an adjustable output frequency for the cable distribution network.
The cartridges of a headend unit are usually interconnected via a backplane, and are configured by a common control unit. Several headend units can be networked together via external accessories.
The Fautronix GmbH has experiences in the real time signal processing of digital satellite signals (MPEG2) and conversion into the cable network signals.