Investigation of the compatibilty of convetional stereophonic and model-based sound reproduction techniques

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Dr. Fiala Péter
Department of Networked Systems and Services

As the number of speakers gradually rised over time, so could the stereophone based wavefield reproduction methods achieve a more realistic surround sound. All of these method’s surround sound is calculated from the channels’ difference in their integrity and phase. The technique guarantees the best surrounding sound in its so called sweet spot.

The model based wavefield reproduction’s goal is different. It is able to physically restore a full wavefield, produced by a virtual source of sound, using an array of speakers. This, hypothetically ensures perfect surround in any arbitrary point of the space.

The main difference between these techniques is, that in case of seterophonic systems the speaker signals are individually stored, thus providing direct playback, meanwhile in case of the model based systems, the virtual source of sound’s signal, and the space’s attributes are used to render the signals of the array of speakers in real time.

In my thesis I researched the basics of these approaches, and the options to transfer between these approaches, from a stereophone mixed sound sample, with the extracted time domain signals of the space’s and the virtual source of sound’s. Furthermore, I propose a virtual model based simulation, using of which, enables an evaluation of the stereo mixed signal and its parameters.


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