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Investigation on Audio Algorithms Architecture for Stereo Portable Devices

Due to the size constraints of portable stereo listening devices, their small and closely spaced loudspeakers lead to a poor spatial sound image. An audio algorithms architecture is proposed to compensate for the weak sound image. The system is composed of a spatializer based on an improved version of the recursive ambiophonics crosstalk elimination algorithm, integrated with a combined quasi-anechoic equalization approach, and a virtual bass algorithm capable of enhancing the loudspeakers performance. The proposed solution has been successfully implemented on both Android and iOS operating systems. Listening tests show positive results. Although the spatializer is capable of enhancing the spatial impression, the main audio quality suffers, which therefore requires a compensating equalizer and virtual bass algorithm.


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