Effects of Device Mismatch, Language Mismatch and Environmental Mismatch on Speaker Verification

Device, language and environmental mismatch adversely affect speaker verification (SV) performance. We investigate such effects empirically based on the M3 (multibiometric, multilingual and multi-device) corpus (H. Meng et al., 2006). Device mismatch (among 3G phone, PocketPC and a desktop PC plug-in microphone) brings relative performance degradation of 523%; language mismatch (between English and Cantonese) brings 284% and environmental mismatch (between office environment and recording studio) brings 109%. In particular, verification with wide-band models on narrow-band test data outperforms narrow-band models on wide-band test data. The 3G phone´s SV performance is generally low, but remains stable across environments. Additionally, durational variations within two-second utterances may cause a relative change of 633% in SV performance.