Abstract:This paper presents an efficient algorithm for voice over packet switching system using the digital speech interpolation (DSI) technique. More than twice of the interpolation gain (IG) can be obtained by applying DSI to the voice channel. The adaptability of the packet switching networks to the source rate makes it easy for DSI to be realized. The combination of DSI and the packet switching system can significantly save the transmission bandwidth of the multiple voice channels. Theoretical and simulation results show the good performances of the algorithm.