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Low Complexity Virtual Bass Enhancement Algorithm For Portable Multimedia Device

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Earbuds have gained immense popularity with mobile multimedia systems recently owing to their convenience and easy low cost design. Unfortunately their design is subject to severe constraints especially affecting their low frequency signal performance. Bass signal performance contributes significantly to the user perceived sound quality and a good bass signal reproduction is essential. Increasing the sound energy in the bass signal range is an unviable solution since the gain required are exceedingly high and signal distortion occurs because of speaker overload. Recently methods are being proposed to invoke low frequency illusion using psychoacoustic phenomena of the missing fundamental. This paper proposes a simple and effective signal processing method to create bass signal illusion using the missing fundamental effect, at a complexity of 12 MIPS on Motorola 56371 audio DSP ideal for portable device implementation.

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AES - Audio Engineering Society