Validation of the revised STI-r method
article
The revised model for the speech transmission index (STIr, Speech Communication 28 (1999) 109), was validated with an independent set of 68 test conditions. For a subset of 18 conditions, including only additive noise and band-pass limiting, it was veri.ed that the STIr provides a good prediction of the CVC-word score. The additional 50conditions included non-linear distortion, echoes, automatic gain control, and waveform coding. For conditions with these types of distortion speci.c parameters of the test signal are of interest. The parameters of the STI model were tuned in an earlier study for an optimal .t between the traditional STI and the CVC score, for a similar set of transmission conditions [J. Acoust. Soc. Amer. 67 (1980) 318]. It was found that the parameter settings also apply to the present revised model. The prediction accuracy for both male and female speech is 4-6% when expressed in CVC-word scores. This corresponds to a signal-to-noise ratio of about 1-2 dB.
Topics
TNO Identifier
11514
Source
Speech communication, 38(3-4), pp. 413 - 425.
Pages
413 - 425
Files
To receive the publication files, please send an e-mail request to TNO Repository.