Date Added: Dec 2009
Voice transmission on net has increased significantly in last three years. Voice quality can be degraded due to number of reason such as unpredictable short term loads, lack of guarantees on network performance, lack of control over the end systems. Enormous advances have been made in computer technology to send packet voice data. This paper reviews the concerns and technological advancement in this area. The quality of packet audio is largely determined by the mouth-to-ear delay and the packet loss. The contribution of this paper is to study and provide techniques to improve the packet audio quality.