INSTITUTE OF INFORMATION TECHNOLOGIES - BAS

Cybernetics and Information Technologies
Volume 1, No 2. Sofia, 2001, Bulgarian Academy of Sciences


Clipped LPC Cepstrum and Its Application to Text-Independent Speaker Identification

Atanas Ouzounov
Institute of Information Technologies, 1113 Sofia

Abstract: A new modification of the LPC cepstrum of speech signal called clipped LPC (CLPC) cepstrum is proposed. In the CLPC cepstrum is reduced the influence of the low level LPC spectrum's regions. Three LPC cepstrums as features in a text-independent speaker identification task were evaluated using reading text in Bulgarian language collected over noisy telephone lines. These cepstrums are: standard LPC cepstrum, CLPC cepstrum and OSALPC cepstrum. As experimental results shown the proposed cepstrum achieves better results than both LPC and OSALPC cepstrums in this task.