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Perceptually Biased Linear Prediction

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A perceptually biased linear prediction scheme is proposed for audio coding. Using only simple modifications of the coefficients defining the normal equations for a least-squares error, the spectral masking effects are mimicked in the prediction synthesis filter without using an explicit psychoacoustic model. The main advantage of such a scheme is reduced computational complexity. The proposed approach was implemented in a Laguerre-based linear prediction scheme, and its performance was evaluated in comparison with a Laguerrebased linear prediction approach controlled by the ISO MPEG-1 Layer I–II model, as well as with one of the latest spectral integration–based psychoacoustic models. Listening tests clearly demonstrate the viability of the proposed method.

JAES Volume 54 Issue 12 pp. 1179-1188; December 2006
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