This paper introduces a sound stage width extension method for internal loudspeakers. Ambidio is a real-time application that enhances a stereo sound file playing on a laptop in order to provide a more immersive experience over built-in laptop loudspeakers. The method, based on Ambiophonics principles, is relatively robust to a listener's head position and requires no measured/synthesized HRTFs. The key novelty of the approach is the pre/post-processing algorithm that dynamically tracks the image spread and modifies it to fit the hardware setting in real-time. Two detailed evaluations are provided to assess the robustness of the proposed method. Experimental results show that the average perceived stage width of Ambidio is 176° using internal speakers, while keeping a relatively flat frequency response and a higher user preference rating.

Authors: Wu, Tsai-Yi; Roginska, Agnieszka; Glasgal, Ralph
Affiliations: New York University, New York, NY, USA; Ambiophonics Institute, Rockleigh, NJ, USA(See document for exact affiliation information.)
AES Convention: 136 (April 2014) Paper Number: 9077
Publication Date: April 25, 2014
Subject: Spatial Audio

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