EUROSPEECH 2003  INTERSPEECH 2003

An allpole modeling technique, Linear Prediction with Lowfrequency Emphasis (LPLE), which emphasizes the lower frequency range of speech, is presented. The method is based on first interpreting conventional linear predictive (LP) analyses of successive prediction orders with parallel structures using the concept of symmetric linear prediction. In these implementations, symmetric linear prediction is preceded by simple prefilters, which are of either low or high frequency characteristics. Combining those symmetric linear predictors that are not preceded by highfrequency prefilters yields the LPLE predictor. It is proved that the allpole filters computed by LPLE are always stable. The results show that the method is wellsuited when loworder allpole models with improved modeling of the lowest formants are needed.
Bibliographic reference. Alku, Paavo / Backstrom, Tom (2003): "Linear predictive method with lowfrequency emphasis", In EUROSPEECH2003, 433436.