DAB Surround® will lend a whole new quality to digital radio thanks to developments by the Fraunhofer Institute for Integrated Circuits IIS in Erlangen. Researchers there have devised the necessary techniques for processing and compressing the audio data.
“When you listen to music on the radio, it will sound like you’re sitting in a concert hall and not at your own breakfast table,” says Matthias Rose of the IIS. The special feature of DAB Surround is that it doesn’t require a higher data rate than stereo DAB to achieve this noticeably better sound experience. This is because the new MPEG Surround standard, developed largely by Fraunhofer engineers, compresses the six channels of a surround music track to the extent that they require no more memory than a compressed stereo signal.
Another advantage is that radio broadcasters will be spared the expensive business of transmitting simultaneously in stereo and surround, as compression of the original 5.1 data automatically produces a stereo mix and sets parameters describing the surround sound. These parameters require only a few kilobits per second, and are aired by the broadcasters together with the stereo signal. While conventional receivers will ignore these extra data and play back the stereo signal as usual, future DAB Surround receivers will reproduce the original 5.1 sound – in perfect quality.
For broadcasters and programs that do not yet have any 5.1 content or would like to mix 5.1 and stereo source material, the IIS is offering another solution: the SX Pro® technique. This processes the stereo content in real time at the broadcasting station so that it can be smoothly incorporated in a 5.1 transmission. To do so, SX Pro® analyzes the sound characteristics of the stereo music signal and integrates the center and rear channels of a 5.1 system.
This enlarges the optimal listening area and stabilizes the sound. As a result, even oldies from the 1970s and stereo concert recordings of well-known classical works can sail effortlessly over the airwaves in 5.1 Surround from now on. “Our mp3 Surround format also enables surround sound to be heard over the Internet – a chance for thousands of mp3 Web radio broadcasters to offer their listeners an extra bonus,” says Rose. What is special about it is that the required bandwidth stays the same, thus avoiding higher broadcasting costs.
ANTENNE BAYERN and ROCK ANTENNE are leading the way: Online, users can find links to the two broadcasters’ Surround Web radio stations, and can listen to them using the mp3 Surround Player freeware or the latest version of WinAmp.
Matthias Rose | alfa
New Technologies for A/V Analysis and Search
13.04.2017 | Fraunhofer-Institut für Digitale Medientechnologie IDMT
On patrol in social networks
25.01.2017 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
28.04.2017 | Event News
20.04.2017 | Event News
18.04.2017 | Event News
28.04.2017 | Medical Engineering
28.04.2017 | Earth Sciences
28.04.2017 | Life Sciences