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VoIP - IP Telephony White Papers

Adaptive Coding and Packet Rates for TCP-Friendly VoIP Flows

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voip - ip telephony

Overview If low-rate VoIP is transmitted over congested links, both the coding and the packet rate need to be adapted to achieve the best conversational quality: On an Ethernet network it is better to jointly change packet rate and speech coding rate; in WLAN networks it is sufficient to change the packet rate. The paper also studies whether TCP-friendly rate control algorithms are suitable for dynamically adapting packet and coding rate of a VoIP flow. The results show that cannot be used for VoIP applications as they only control the packet rate do not consider packet sizes. Also, they do not transmit small (speech) packets fairly.

Further White Paper Details
Publisher	Technical University of Berlin	File Format	PDF
Date Published	September 2005
Format	White Papers
Topics	VoIP - IP Telephony, TCP - IP, Software Engineering

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