How to Improve the Voice Quality of VoIP

【摘要】：正VoIP(voice over internet protocol ) has made great progress in Communication area in recent years.But a biggest pity is that the voice quality of VOIP can' t satisfy users as traditional phone via PSTN does.In this paper, the author analysis the reason and bring out some methods to improve the voice quality of VOIP that are utilizing the bandwidth effectively to reduce delay;minishing the jitter to reduce packet lose and bit error;eliminating the echo.As the emphases,the author pointed out the specialty of echo on the internet voice communication and the ways how to eliminate the acoustic echo.