London - Aug 7, 2013 - A three-month experiment carried out by the UK's OFCOM Broadcast Specialist Rashid Mustapha has proved that DAB transmission can be done easily and inexpensively, according to The Register. Mustapha conducted the tests on his own time.
The experiment, done under a Non-Operational Test and Development license issued by OFCOM, made use of a 2GHz Pentium to run the software. Subsequent testing showed that a Raspberry PI, a credit card-sized computer, could have worked as well.
The computer received the program data over an IP stream, converted it to an MP2 (the codec used with DAB) and then fed that into an open-source CRC-DABMUX -- a software DAB multiplexer developed by the Communications Research Center, which is funded by the Canadian Government. RF amplifiers used were run well below their operating limits to meet the operating masks required by the ITU for DAB transmission.
The last patent restrictions for DAB recently expired, and so software-based radios can be used to generate DAB without restrictions or fears of litigation.