In this paper we present the Netlab Quality Management Framework (NQMF), a set of tools especially designed to support controlled experimental analysis of voice-over IP (Internet Protocol) implementations. NQMF implements an integrated methodology to generate, in a controlled way, packet loss and delay sequences which effectively reproduce the fluctuating conditions of the Internet, and especially the high-frequency phenomena that mainly influence speech intelligibility. Our generator is based on a large set of measured sample traces, recorded in a variety of conditions over the network, and takes into special account the so-called 'coffee break' peaks. We also discuss a validation procedure that we carried out to account for the improvement that our generator has over simpler ones already proposed in the literature.
Methods and tools for the objective evaluation of voice over IP communications
Carlo Gaibisso;Roberto Puccinelli;
2001
Abstract
In this paper we present the Netlab Quality Management Framework (NQMF), a set of tools especially designed to support controlled experimental analysis of voice-over IP (Internet Protocol) implementations. NQMF implements an integrated methodology to generate, in a controlled way, packet loss and delay sequences which effectively reproduce the fluctuating conditions of the Internet, and especially the high-frequency phenomena that mainly influence speech intelligibility. Our generator is based on a large set of measured sample traces, recorded in a variety of conditions over the network, and takes into special account the so-called 'coffee break' peaks. We also discuss a validation procedure that we carried out to account for the improvement that our generator has over simpler ones already proposed in the literature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
