Comparison of geometrical acoustic simulation methods. - In: AIA-DAGA 2013, ISBN 978-3-939296-05-8, (2013), S. 583-586
HRTF adaption under decreased immersive conditions. - In: AIA-DAGA 2013, ISBN 978-3-939296-05-8, (2013), S. 580-582
Synthesis of binaural room impulse responses. - In: AIA-DAGA 2013, ISBN 978-3-939296-05-8, (2013), S. 572-575
An algorithm is developed which synthesizes binaural room impulse responses (BRIRs) by interpolation between measured data sets. Emphasis is put on the interpolation between distances for different rooms. A linear interpolation in time domain and a time adjustment of the two BRIRs by dynamic time warping prior to interpolation to generate new data sets are used. BRIRs are measured in two rooms for different distances as raw data for the synthesis. For each room an interpolation between data sets of different distances is carried out. The results of the synthesis are evaluated in a listening test. On the basis of perceived distance and externalization the general applicability of the synthesized impulse responses for binaural reproduction is investigated. We can show that there is no significant difference in distance perception between synthesized and measured BRIRs. Furthermore, the test shows that perceived externalization benefits from the amount of reverberation and from congruence between the synthesized and listening room. The positive influence of the congruence between the rooms is minor if the synthesized signals are reverberant but it becomes more dominant if there is less reverberation.
Effects of the Direct-to-Reverberant-Ratio and divergence between synthesized and listening room on perception of virtual acoustic environment. - In: AIA-DAGA 2013, ISBN 978-3-939296-05-8, (2013), S. 566-568
Beyond the correct technical realization of binaural signals and synthesis, perceptional effects depending on congruence and divergence between the synthesized scene and listening situation have a not neglectable influence on perception and plausibility of synthesis. This contribution deals with the perceived externalization and plausibility of virtual acoustic environment at binaural headphone synthesis. Investigations of divergence and congruence between listening room and auralized room are conducted. The Direct-to-Reverberant-energy-Ratio (DRR) as an adjustable parameter of binaural room impulse responses is adapted to evaluate externalization and perceived congruence between the synthesized scene and the listening environment. A clear influence of the listening room on perception of externality is visible in the results of the listening tests.
Effects of shaping of binaural room impulse responses on localization. - In: 2013 Fifth International Workshop on Quality of Multimedia Experience (QoMEX), ISBN 978-1-4799-0738-0, (2013), S. 88-93
http://dx.doi.org/10.1109/QoMEX.2013.6603216
Perceptual coding of high-quality digital audio. - In: Proceedings of the IEEE, ISSN 1558-2256, Bd. 101 (2013), 9, S. 1905-1919
http://dx.doi.org/10.1109/JPROC.2013.2263371
Vertical sound source localization influenced by visual stimuli. - In: Signal Processing Research, ISSN 2327-171X, Bd. 2 (2013), 2, S. 29-38
It is well-known that the perception of the position of audio and video stimuli is not independent. In general, video dominates the position if the position offset between audio and video is small. Most previous work focused on natural listening conditions and position offsets between audio and video in the horizontal plane. There is little research concerning offsets in vertical direction and artificial, auralized sound environments. Among different approaches to auralization of spatial audio, the binaural reproduction is especially very interestingas it offers proper perception of direction, distance, and elevation of sound sources at moderate cost. This article addresses the question whether the thresholds of perceptual fusion of audio and video stimuli are the same in binaural reproduction systems and in natural listening conditions. To estimate the influence of audio-visual discrepancy on vertical sound source localization, two experiments have been designed. The test methods were optimized to improve usability and minimize rating errors. Both experiments resulted in psychometric functions of intersensory bias for competing audio and visual stimuli. For binaural reproduction, the obtained results showed an effect of similar magnitude for both the vertical and horizontal plane which is in good agreement with the results obtained from other studies in natural environments.
http://www.db-thueringen.de/servlets/DocumentServlet?id=22564
Evaluation of differences in quality of experience features for test stimuli of good-only and bad-only overall audiovisual quality. - In: Image quality and system performance X, ISBN 978-0-8194-9426-9, 2013, 86530B, insges. 10 S.
Evaluierung einer Wahrnehmungsschwelle von Kameratrackingfehlern beim Compositing realer und virtueller S3D-Videos. - In: 15. ITG-Fachtagung für Elektronische Medien (Fernsehseminar), (2013), insges. 6 S.
Dieses Paper präsentiert eine Studie zur Untersuchung der Akzeptanz von Kameratrackingfehlern in stereoskopischen Videosequenzen für den Einsatz in der Stereo-3D (S3D) Fernsehproduktion. Die klassische Betrachtungsweise von Fehlertoleranzen beim Kameratracking ist rein technisch motiviert. Im Zentrum dieser Studie wird deshalb aus zuschauer-zentrierter Sicht die Fragestellung untersucht, ab welcher Ausprägung Trackingfehler in den sechs Freiheitsgraden der extrinsischen Orientierung der Kamera wahrgenommen, beziehungsweise als störend eingeschätzt werden. Dies geschieht unter Anwendung einer Variation der Methode der eben merklichen Unterschiede (Method of Limits). Die Auswertung zeigt, dass Unterschiede zwischen den einzelnen Parametern existieren und dass das subjektive Empfinden von Trackingfehlern weitaus toleranter ist als die harten rechnerischen Grenzen.
https://eldorado.tu-dortmund.de/handle/2003/30049
Kurven gleicher Lautheit bei binauraler Kopfhörerwiedergabe. - In: Expertise in audio media, ISBN 978-3-9812830-3-7, (2013), S. 630-634