Program: OPSODIS Demos

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  A women in white is wearing headphones and looking up. Text above her head says '2019 AES International Conference on Immersive and Interactive Audio. March 27-29, 2019. York, UK.




Takashi Takeuchi, Motoki Yairi and Keith Holland


The optimal source distribution (OPSODIS) is known to improve many of the problems arising with the binaural reproduction over loudspeakers. It retains the resolution and quality of the original contents, and robust to errors hence works even in a non-anechoic environment without on-site adjustments. The principle utilizes the idea of a pair of conceptual monopole transducers whose azimuthal location varies continuously as a function of frequency. It is also known that the OPSODIS can provide the same binaural signals for multiple listeners at the same time despite it is 2 channel (or 3 channel) crosstalk cancellation system. Detailed theoretical, analytical and experimental studies for synthesizing virtual auditory space to multiple listeners using 2 channel OPSODIS is presented in a paper at this conference and more follows in the near future. A practical prototype sound-bar based on discretized 3 channel OPSODIS principle which is capable of practical 3D audio reproduction to 5 directions at the same time was created and demonstrated here. Binaural audio contents, HD video with binaural audio, synthesized binaural audio converted from surround formats like dts, Dolby Atmos will be demonstrated to 5 listeners at a same time. Visitors can also play their own favorite films on Blu-ray which is decoded and 3D audio is reproduced to multiple listeners in real-time.

AES - Audio Engineering Society