AES Europe 2025
Keynote & Richard Heyser Memorial Lecture

May 2025

Dr. Hyunkook Lee

Keynote
Dimensions of Immersive Audio Experiences

Immersive audio is rapidly becoming a standard across sectors such as music, film, gaming, and XR. Increasingly, the term “immersive” is used as an umbrella term for spatial and 3D audio. However, there remains a lack of clarity around what “immersive” truly means, leading to confusion, and often disappointment when audiences encounter audio content labelled as immersive but do not perceive it as such. This disconnect highlights a critical issue: the intended immersive experience is not always interpreted as immersive by the listener. To make spatial or 3D audio genuinely immersive, we need a clear and shared understanding of the concept and, more importantly, its core dimensions. This is essential not only for practitioners and developers, who must ensure that their content and systems are perceived as immersive, but also for researchers aiming to measure immersive audio experiences more consistently and build a coherent body of knowledge. This keynote will present a unified conceptual model of immersive experience and explore the technical and human factors that contribute to delivering truly immersive audio.
Dr. Jürgen Herre

Richard Heyser Memorial Lecture
It's All About Perception - A Personal Research Journey

Embarking on my professional journey as a young DSP engineer at Fraunhofer IIS in Erlangen, Germany, in 1989, I quickly encountered a profound insight that would shape my entire career in audio: audio is not merely data like any other set of numbers; its significance lies in how it sounds to us as human listeners. The sonic quality of audio signals cannot be captured by simple metrics like ‘signal-to-noise ratio.’ Instead, the true goal of any skilled audio engineer should be to enhance quality in ways that are genuinely perceptible through listening, rather than relying solely on mathematical diagnostics.

 

This foundational concept has been a catalyst for innovation throughout my career, from pioneering popular perceptual audio codecs like MP3 and AAC to exploring audio for VR/AR and AI-driven audio coding.

 

Join me in this lecture as I share my personal 36-year research journey, that led me to believe that in the world of media, it’s all about perception!

Curriculum vitae

After studying electrical engineering at University of Erlangen-Nürnberg, Germany, Jürgen Herre joined the Fraunhofer Institute for Integrated Circuits (IIS) in Erlangen, Germany, in 1989. Since then he has been involved in the development of perceptual coding algorithms for high quality audio, including the well-known ISO/MPEG-Audio Layer III coder (aka “MP3”). In 1995, Dr. Herre joined Bell Laboratories in New Jersey, USA, for a Post-Doctoral term working on the development of MPEG-2 Advanced Audio Coding (AAC). By the end of ‘96 he went back to Fraunhofer IIS to work on the development of more advanced multimedia technology including MPEG-4, MPEG-7, MPEG-D, MPEG-H and MPEG-I, currently as the Chief Executive Scientist for the Audio and Media Technologies division at Fraunhofer IIS, Erlangen. In September 2010, Dr. Herre was appointed professor at the University of Erlangen-Nürnberg, Germany, and the International Audio Laboratories Erlangen.

 

Dr. Herre is a fellow of the Audio Engineering Society and chair of the AES Technical Committee on Coding of Audio Signals. He has been a vice chair and chair of the AES Technical Council for 25 years. He is also a senior member of the IEEE and served as a member of the IEEE Technical Committee on Audio and Acoustic Signal Processing and as an associate editor of the IEEE Transactions on Speech and Audio Processing and was a long-time active member of the MPEG audio standardization group.

 

Dr. Herre was a recipient of two Fraunhofer Awards in 1992 and 2004, respectively, of the Eduard-Rhein Award in 2015, and the IEEE Industrial Innovation Award in 2020. He is inventor and co-inventor of more than 160 patents in the field of audio signal processing.