REPORT motlicek:rr07-66/IDIAP LP-TRAPs in all senses Motlicek, Petr EXTERNAL http://publications.idiap.ch/attachments/reports/2007/motlicek-idiap-rr-07-66.pdf PUBLIC Idiap-RR-66-2007 2007 IDIAP This report describes additional experiments with LP-TRAPs -- speech features derived from autoregressive model applied to approximate temporal evolution of speech spectra in critical band-sized frequency sub-bands. The importance of free parameters, such as order model, length of the approximated temporal pattern, compression factor, or number of resulting cepstral coefficients, is investigated and evaluated using TANDEM-ASR approach.