包交换系统中的一种DSI算法

A DIGITAL SPEECH INTERPOLATION ALGORITHM FOR THE PACKET SWITCHING SYSTEM

该文将数字语音插空(DSI)技术应用于包交换系统中,给出了一种高效传输话音信号的实现方案。在话音信道中采用DSI技术可获得不少于两倍的插空增益,而各种包交换系统对信源速率变化的适应性又使得DSI的实现非常容易。多路话音信号经DAI处理后送入包交换系统传输可显著提高通信线路的利用率。理论分析和计算机模拟结果验证了该方案的良好性能。

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.