• Most of all Satellite TV Channels are Digital QPSK (Quadrature Phase Shift Keying) format, where many programmes are compressed and packed into single transponder/frequency. This way we have hundreds of programmes from any particular Satellite.
  • There is yet another development in television communication front. COFDM (Coded Orthogonal Frequency-Division Multiplexing) is one of the latest Digital compression technologies used by TV stations to provide multiple programmes to their viewers over a single frequency in High Quality.
  • In conventional Off-air TV system, the (RF) channels broadcasted by a TV station are in Analogue format giving one programme per channel.
  • With Digital switchover across the globe, these analogue channels are converted into Digital using COFDM modulation before telecast and thus TV studios can send many more programmes with high quality Digital terrestrial transmission (also known as DTT) over a few frequencies only. The signals are widely known as DVB-T as well.