Voice Biometrics – Text-Dependent vs. Text-Independent

Voice biometrics systems come in two flavors: text-dependent and text-independent.

Let’s explore the difference…

Text-dependent systems require a person to speak the same pass phrase(s) during enrollment and identity verification. The system compares the base voiceprint from enrollment with the sample voiceprint from verification. The majority of voice biometrics systems are text dependent.

Text–independent systems do not require a person to speak a specific pass phrase during enrollment and verification. The base voiceprint and sample voiceprint can be obtained in the background – even without the person’s knowledge (ideal for forensic applications). Text-independent systems usually require a longer enrollment process to ensure verification accuracy.