Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Initiating the Surround Sound Era for Digital Radio

06.10.2004


Telos/Omnia and Fraunhofer IIS announce the first public demonstration of their new surround system for HD Radio™ at the NAB Radio Show in San Diego, October 6-8, booth 907.



At NAB Radio Show, Telos/Omnia and Fraunhofer IIS present a novel surround system for HD Radio™ delivering impressive full surround audio without compromising the stereo signal in any way. This way, both users equipped with conventional stereo receivers and those owning surround receivers will get the maximum audio pleasure while listening to the same radio program.

HD Radio, the new digital radio broadcast standard for the USA, works in the traditional FM and AM channels to deliver high quality digital audio to listeners. About 100 radio stations are already on-air using HD Radio technology, with many more planning to begin HD Radio broadcast. Several digital receivers capable of HD Radio reception are available to consumers. Omnia’s President, Frank Foti says, "Surround using this approach and transmitted digitally over HD Radio is a true gain in audio excellence."


The key to the system is that all the pieces of audio that go to the surround channels are present in the two stereo channels. Additionally, there is an ancillary data channel used for transmitting spatial information. The surround decoder, if present in the receiver, uses this information to move the pieces of audio to their respective positions, recreating the original multi-channel sound. In the system presented, 80 kbit/s are used for the stereo channels and 16 kbit/s for the surround information.

The system is based on work by Fraunhofer IIS and Agere Systems in the area of "binaural cue coding". Three essential factors are required for the perception of a spatial audio image: level difference, time difference and coherence between channels. These values are represented as a function of frequency and time with very compact coding and allow for a huge data saving compared to transmitting all audio channels individually.

Harald Popp, head of the Fraunhofer IIS Multimedia Realtime Systems Department notes, "Having invented MP3 we see surround as the next major audio enhancement. The sound is exquisite in the lab and will be as striking on air."

Telos CEO Steve Church comments, "Radio station owners paid for an old-fashioned FM stereo license, but with this technology they could have a state-of-the-art digital surround license for no additional cost."

The surround technology can work with any core stereo codec. Fraunhofer IIS has already presented it as an enhancement to MP3 and MPEG-4 HE-AAC, and work is underway to marry it with other codecs.

Stefan Geyersberger | alfa
Further information:
http://www.iis.fraunhofer.de/amm

More articles from Communications Media:

nachricht On patrol in social networks
25.01.2017 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO

nachricht Tile Based DASH Streaming for Virtual Reality with HEVC from Fraunhofer HHI
03.01.2017 | Fraunhofer-Institut für Nachrichtentechnik Heinrich-Hertz-Institut

All articles from Communications Media >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>