Despite its many prima facie attractive properties for Forensic Speaker Recognition, F0 is regarded as having limited forensic value due to its large within-speaker variability. However, its forensic use to date has been limited mostly to its long-term mean and standard deviation. This paper examines the discriminatory potential, within a Likelihood Ratio-based approach, of additional parametric features from the distribution of long-term F0: its skew, kurtosis, modal F0 and modal density. Motivated by the observation that the overall long-term F0 distribution shows less within-speaker occasion-to-occasion difference, we report a forensic discrimination experiment with noncontemporaneous speech samples from 201 male Japanese speakers. Using a multivariate LR as discriminant distance with the six LTF0 distribution parameters, an EER of 10.7% is obtained from 201 target and 80400 non-target trials. We also investigate how the EER degrades as a function of amount of voiced speech.
|Title of host publication||Odyssey 2008: The Speaker and Language Recognition Workshop|
|Place of Publication||Stellenbosch, South Africa|
|Publisher||International Speech Communication Association|
|Number of pages||8|
|Publication status||Published - 2008|
|Event||Odyssey 2008, The Speaker and Language Recognition Workshop - Stellenbosch, Stellenbosch, South Africa|
Duration: 21 Jan 2008 → 24 Jan 2008
|Conference||Odyssey 2008, The Speaker and Language Recognition Workshop|
|Period||21/01/08 → 24/01/08|
Kinoshita, Y., Ishihara, S., & Rose, P. (2008). Beyond the long-term Mean: Exploring the Potential of F0 Distribution Parameters in Forensic Speaker Recognition. In N. Brummer (Ed.), Odyssey 2008: The Speaker and Language Recognition Workshop (Vol. 1, pp. 1-8). Stellenbosch, South Africa: International Speech Communication Association.