Thomson Broadcast & Multimedia supplied the transmission technology for a recent Digital Radio Mondiale (DRM) demonstration in Delhi, India.
The full-bandwidth 18 kHz DRM medium-wave trial took place as part of a DRM simulcast technology showcase sponsored by public-service broadcaster All India Radio, the Asia-Pacific Broadcasting Union and the DRM consortium.
“This is quite a significant event,” said Sharad Sadhu, head of transmission technology and spectrum at the ABU. “Radio broadcasters in the Asia-Pacific uniquely use 18 kHz-wide channels in the medium wave, and using DRM in the full channel will enable them to provide a very high quality stereo service to listeners.”
The trials demonstrated DRM digital radio transmissions in the medium wave band using Single Channel Simulcast (SCS) and Multi-Channel Simulcast (MCS) technologies. It also demonstrated local DRM radio transmissions in the 26 MHz band, Near Vertical Incidence transmissions and DRM shortwave radio transmissions.
For the trials, Thomson provided a DRM-ready 100 kW TMW 2100D medium-wave transmitter and a digital front-end including the Thomson Stratus DRM modulator and the Cirrus DRM multiplexer. Thomson is a founding member of the DRM consortium.