"At each MWC Shanghai exhibition, there are enterprises that seem to have a low profile, but their products and technologies have penetrated into countless fields and changed the consumer experience again and again with behind the scenes forces: for example, Fraunhofer IIS, a famous research institution in the audio and media technology industry, at the just concluded MWC Shanghai Exhibition in 2018, Toni Fiedler, head of the China Office of the Research Institute, and his team have brought the latest multimedia technologies for mobile and home users, which have repeatedly attracted the admiration of experimenters, including: mpeg-h video and audio system for creating immersive and interactive sound effects in the field of radio, television and Ott; An immersive audio virtual device uphear that creates home theater level sound effects through a 3D strip speaker; Enhanced voice codec EVs technology that brings full HD voice call quality to mobile phone users; And xhe AAC technology, which brings excellent audio solutions to digital broadcasting and mobile streaming media applications.
Toni Fiedler, head of Fraunhofer IIS China Office
As Toni Fiedler said, in recent years, with the vigorous development of Ott industry, users' consumption habits of video content have changed continuously, from the original large screen (TV) to small screen (mobile phone), and then gradually return to ultra clear large screen (TV box, projection screen, etc.). At the same time, users' pursuit of shocking audio experience is also increasing year by year. They hope to experience cinema like audio-visual effects anytime and anywhere on any device. This demand also continues to stimulate the technological innovation of the audio industry.
Mpeg-h was selected into the draft of China Radio and television 3D acoustic transmission section standard, and the immersive experience was further improved
The media also had the honor to experience several of these new technologies. It is worth mentioning that mpeg-h technology has become the world's first successful commercial next-generation radio and television audio technology. In March this year, the Fraunhofer technology proposal based on mpeg-h technology was selected into the draft of China Radio and television three-dimensional sound transmission section standard. At present, professional radio and television equipment equipped with mpeg-h Technology (encoder, decoder and monitoring solutions) and consumer electronic products (home set-top box and TV) have come out successively.
In a closed room built on site, mpeg-h TV audio system enables media reporters to experience great immersive and interactive audio effects through a special speaker. Moreover, users can adjust the mixing effect according to their preferences and significantly improve the authenticity and appeal of the sound. In addition, Mpeg-h can also customize the best sound playback effect according to different devices and listening environment (for example, narrators in different languages can be selected in documentaries, and the voice size of narrator or film recording, etc.). It is reported that mobile devices and Ott applications supporting mpeg-h decoding in the future can also bring the same real auditory feast.
Moreover, according to Toni Fiedler, his team and CCTV have tested China's three-dimensional audio real-time signal in the early stage of the 2018 World Cup in Russia, verified the feasibility of the draft standard in the actual live broadcast process, and the standard is expected to be released soon.
EVs and xhe AAC technologies bring "Gospel" to mobile voice calls and digital broadcast streaming media applications“
The enhanced voice service (EVS) launched by Fraunhofer IIS is the next generation 3GPP volte codec, which can bring users full HD voice call quality and significantly improve the indoor signal coverage of buildings. At present, this technology has been adopted by many international operators, and more and more mobile phones have supported this new audio technology. Moreover, China Mobile has successfully upgraded its volte network to support EVs technology. Voice calls between 4G users based on LTE network can experience higher definition sound quality than before.
Another xhe AAC (extended he AAC) technology, which is also widely used in the world, can transmit all kinds of high-quality audio content at very low bit rate (mono as low as 6 kbit / s). In case of network congestion, streaming media applications and broadcast players supporting xhe AAC technology can adjust to very low bit rate streams on demand and achieve continuous playback effect. With this technology, streaming media service providers can significantly reduce CDN costs. At present, xhe AAC is natively supported in Android P developer preview 3. Without additional cost, users can enjoy xhe AAC technology included in AAC patent license.
Smart speaker is a very popular AI product at present. At this exhibition, the internal structure of a yandex Russian smart speaker integrated with Fraunhofer uphair voice quality enhancement technology in a transparent glass box also attracted many people. Its special feature is that there are 7 microphones built in different directions of the speaker, It can accurately recognize voice commands from any position in the room and weaken noises from other directions, so as to make intelligent response faster., Technology Zone
Fraunhofer IIS innovates audio technology to bring "happiness" to mobile phone and digital broadcast streaming media applications
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