Receiver based packet loss replacement technique for high quality VoIP streams

Voice over Internet Protocol is a growing technology that enables voice communication through the Internet. The transmission of audio data over packet switched networks faces lot of difficulties by a variety of network impairments. Such networks are not designed to support real time voice communication because of their variable characteristics. The conversational quality of a VoIP communication is dependent on several factors such as networking conditions, coding process used, speech content, type of error correction, flowid. The factors which affects the Quality of Service (QoS) is due to delay, delay variation, packet loss, repeat - request, loss rate, QoS control, throughput, network security, network reliability, providing bandwidth, voice compression, echo suppression and jitter on the perceived conversational quality. Packet loss is a serious and critical issue for voice over internet protocol applications. It degrades the performance of VoIP. This paper focuses on packet loss which is a crucial problem to be addressed. This paper provides Packet loss replacement mechanisms and discusses their suitability for use in IP-based networks by using a receiver based repetition technique. It performs better quality monitoring of VoIP service at the receiver side. The obtained results suggest that the overall quality of voice can be quite beneficial for real time applications.