Publications in the field

Below you will find an automated compilation of the publications of the group. For publications of the individual members of staff, please refer to their personal pages.

List of publications

Anzahl der Treffer: 283
Erstellt: Thu, 28 Mar 2024 23:02:46 +0100 in 0.0573 sec


Grollmisch, Sascha; Johnson, David; Krüger, Tobias; Liebetrau, Judith
Plastic material classification using neural network based audio signal analysis. - In: SMSI 2020, (2020), S. 337-338

Werner, Stephan; Klein, Florian; Müller, Clemens
Evaluation of spatial audio quality of the synthesis of binaural room impulse responses for new object positions. - In: 147th Audio Engineering Society Convention 2019, (2020), S. 972-981

The aim of auditory augmented reality is to create an auditory illusion combining virtual audio objects and scenarios with the perceived real acoustic surrounding. A suitable system like position-dynamic binaural synthesis is needed to minimize perceptual conflicts with the perceived real world. The needed binaural room impulse responses (BRIRs) have to fit the acoustics of the listening room. One approach to minimize the large number of BRIRs for all source-receiver relations is the synthesis of BRIRs using only one measurement in the listening room. The focus of the paper is the evaluation of the spatial audio quality. In most conditions differences in direct-to-reverberant-energy ratio between a reference and the synthesis is below the just noticeable difference. Furthermore, small differences are found for perceived overall difference, distance, and direction perception. Perceived externalization is comparable to the usage of measured BRIRs. Challenges are detected to synthesize more further away sources from a source position that is more close to the listening positions.



Sloma, Ulrike; Klein, Florian; Werner, Stephan; Pappachan Kannookadan, Tyson
Synthesis of binaural room impulse responses for different listening positions considering the source directivity. - In: 147th Audio Engineering Society Convention 2019, (2020), S. 377-385

Lenzen, Lucien; Hedtke, Rolf; Christmann, Mike
HDR in consideration of the abilities of the human visual system. - In: SMPTE motion imaging journal, ISSN 2160-2492, Bd. 128 (2019), 5, S. 40-45

In recent years, high dynamic range (HDR) has been improved enormously. The capability of cameras and displays to reproduce small differences in luminance levels is constantly growing. However, we are still dealing with a limitation of the human visual system (HVS) known as the simultaneous contrast range (SCR). Compared to earlier studies, this paper focuses on real-world scenarios for evaluating the SCR. In natural images, bright highlights, especially in HDR, can limit the eyes' sensitivity to small differences in surrounding dark areas. This paper describes a test-image set developed as part of current research activities by the authors to measure the relation between the perceived SCR and the following four significant parameters: the distance, or rather, the viewing angle; the size of the bright highlight; the luminance of the highlight; and the ambient light. As a result, a mathematical formula is given that can help to evaluate and improve HDR viewing experiences as well as standard dynamic range downconversions.



https://doi.org/10.5594/JMI.2019.2907350
Nowak, Johannes; Fischer, Georg
Modeling the perception of system errors in spherical microphone array auralizations. - In: Journal of the Audio Engineering Society, ISSN 0004-7554, Bd. 67 (2019), 12, S. 994-1002

https://doi.org/10.17743/jaes.2019.0051
Neidhardt, Annika; Schneiderwind, Christian
Physical and perceptual differences of selected approaches to realize an echolocation scenario in room acoustical auralizations. - In: Proceedings of the International Symposium on Room Acoustics, (2019), S. 237

http://doi.org/10.18154/RWTH-CONV-240146
Schneiderwind, Christian; Neidhardt, Annika
Perceptual differences of position dependent room acoustics in a small conference room. - In: Proceedings of the International Symposium on Room Acoustics, (2019), S. 499-506

http://doi.org/10.18154/RWTH-CONV-240138
Remaggi, Luca; Kim, Hansung; Neidhardt, Annika; Hilton, Adrian; Jackson, Philip J. B.
Perceived quality and spatial impression of room reverberation in VR reproduction from measured images and acoustics. - In: Proceedings of the 23rd International Congress on Acoustics, (2019), S. 3361-3368

https://edocs.tib.eu/files/e01mr19/1677542403.pdf
Brandenburg, Karlheinz; Fiedler, Bernhard; Fischer, Georg; Klein, Florian; Neidhardt, Annika; Schneiderwind, Christian; Sloma, Ulrike; Stirnat, Claudia; Werner, Stephan
Perceptual aspects in spatial audio processing. - In: Proceedings of the 23rd International Congress on Acoustics, (2019), S. 3354-3360

Spatial audio processing includes recording, modification and rendering of multichannel audio. In all these fields there is the choice of either a physical representation or of perceptual approaches trying to achieve a target perceived audio quality. Classical microphone techniques on one hand and wave field synthesis, higher order ambisonics or certain methods of binaural rendering for headphone reproduction on the other hand target a good physical representation of sound. As it is known today, especially in the case of sound reproduction a faithful physical recreation of the sound wave forms ("correct signal at the ear drums") is neither necessary nor does it allow a fully authentic or even plausible reproduction of sound. 20 years ago, MPEG-4 standardized different modes for perception based versus physics based reproduction (called "Perceptual approach to modify natural source" and "Acoustic properties for physical based audio rendering"). In spatial rendering today, more and more the perceptual approach is used in state of the art systems. We give some examples of such rendering. The same distinction of physics based versus psychoacoustics (including cognitive effects) based rendering is used today for room simulation or artificial reverb systems. Perceptual aspects are at the heart of audio signal processing today.



https://edocs.tib.eu/files/e01mr19/1677542403.pdf
Neidhardt, Annika;
Data set: BRIRs for position-dynamic binaural synthesis measured in two rooms. - In: Audio for virtual, augmented and mixed realities, (2019), S. 165-169

Binaural room impulse responses were measured with a KEMAR 45BA head-and-torso-simulator. For the first data set, it was placed at different positions located on a line with a length of 2 m in a 25 cm positional resolution and an azimuth resolution of 4˚. Two source positions were considered in the setup, one in front of the line, one at the side. The same arrangement of source and receiver positions was realized in two different rooms, a quite dry listening laboratory and a quite reverberant seminar room. For the second data set, BRIRs and omni-directional RIRs were measured for a translation line with a length of 7.5 m through the given seminar room. The data sets are valuable for realizing, testing and studying dynamic binaural walk-through scenarios in the two different rooms.



https://doi.org/10.22032/dbt.39972