Improving upon toll quality speech for VOIP

It is well known that wider bandwidth speech is preferred both for quality and intelligibility. In this paper we describe a new, low complexity method for creating wider bandwidth speech from clean telephone bandwidth speech. In addition, we describe a packet loss concealment technique that has been standardized for ITU-T Rec. G.711 64 kb/s PCM and is applicable to wider bandwidth speech as well. Together, these two techniques address two of the primary issues with Voice over IP-how to provide greater fidelity to customers and how to overcome packet losses when they do occur.