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Article Dans Une Revue Speech Communication Année : 2009

Stabilised Weighted Linear Prediction

Carlo Magi
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Jouni Pohjalainen
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Tom Bäckström
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Paavo Alku
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Résumé

Weighted linear prediction (WLP) is a method to compute all-pole models of speech by applying temporal weighting of the square of the residual signal. By using short-time energy (STE) as a weighting function, this algorithm was originally proposed as an improved linear predictive (LP) method based on emphasising those samples that fit the underlying speech production model well. The original formulation of WLP, however, did not guarantee stability of all-pole models. Therefore, the current work revisits the concept of WLP by introducing a modified short-time energy function leading always to stable all-pole models. This new method, stabilised weighted linear prediction (SWLP), is shown to yield all-pole models whose general performance can be adjusted by properly choosing the length of the STE window, a parameter denoted by .
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Dates et versions

hal-00516740 , version 1 (11-09-2010)

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Carlo Magi, Jouni Pohjalainen, Tom Bäckström, Paavo Alku. Stabilised Weighted Linear Prediction. Speech Communication, 2009, 51 (5), pp.401. ⟨10.1016/j.specom.2008.12.005⟩. ⟨hal-00516740⟩

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