Assessment of speaker recognition on lossy codecs used for transmission of speech

This paper deals with effect of lossy codecs used in telephony on text-independent speaker recognition. We investigate the influence for variety of codecs used in wired, cellular and IP telephony including the recently released SILK codec. The speaker recognition performance degradation is assessed with respect to the bandwidth usage, transmission packet loss and utilization of discontinuous transmission techniques. We show that there is only little loss in recognition performance for modern codecs operating at bitrates of about 15 kb/s. The best overall performance was observed for the SILK codec.