An American company promises to realise the dream of advertisers, greedy for information on the audience of broadcasters that would enable them not only to choose on which stations and at what time to air the commercial, but to understand who listened to it and whether they zapped. Television, with smart TVs and set-top boxes, has long offered the possibility of monitoring audience habits down to the last detail. For radio, on the other hand, listening surveys detect the age, socio-economic profile, and musical tastes of the listener but do not offer precise data on when one stops on a station or whether one ‘zaps’ when there are commercials.
The system integrates radio, streaming audio, and TV
Photographing in-car behaviour is now being attempted by Xperi, a giant that holds the patent for the equipment (transmitters and receivers) of digital HD Radio (used on medium wave and FM in the States). The company has launchedDTS AutoStage, an infotainment system that lifts the veil on how people behave in the car. This is important data since in many countries mobile listening accounts for 60% of the audience. The new infotainment system integrates radio, streaming audio and video, promises an immersive experience, and… records what the user does. Joe D’Angelo, senior vice president of broadcast and digital audio at Xperi is excited because the system will offer radio stations and advertisers ‘new revenue opportunities with brands and advertisers‘. Written by Fabrizio Carnevalini
Interference on the medium waves generated by battery-powered cars has prompted several manufacturers (Audi, BMW, Mini, Tesla, and Volkswagen) toeliminate the AM tuner in their battery-powered models (we’ve already discussed it here). But new radio disturbances are on the horizon on which it would be difficult to act. Raising the alarm is the ITU (International Telecommunication Union): induction charging systems generate harmonic frequencies between 500 and 700 kHzthat cannot be eliminated by shielding because they are picked up by the antenna. In theory, U.S. law prohibits interfering with licensed stations, so if electric cars disrupt broadcasters, it is up to manufacturers to comply. Technically, however, it is not easy, and since the electric market moves huge interest (by 2030 in the U.S., one out of every two new cars should be electric) the game is wide open.
Heavy interference, but there may be a solution
Induction charging is convenient because it avoids the use of a cable. But the high powers involved (10 kW for a car, 100 kW for a public service bus) produce “robust” phantom signals. There is also DWPT, based on the same technology, which is used to extend the range of cars (now limited to a few hundred kilometers). It relies on coils placed under the asphalt that transfer energy directly to vehicles that do not have to stop at designated charging stations. What to do then? According to Xperi, stations could transmit digitally with the HD Radio system (for which the company owns the patent) because signal processing and error correction provide greater immunity to noise. (Written by Fabrizio Carnevalini)