Intelligibility in Telephone Conversations with Packet Loss

Authors: Thilo Michael


With the rise of mobile Voice over IP networks, packet loss becomes one of the most prominent degradations experienced by the users of those services. Depending on the probability and burst rate of the packet loss, portions of the speech become unintelligible as more and more information is lost during transmission. In real-world conversations, the intelligibility is not only dependent on the amount of lost signal but also influenced by the amount of contextual information present in the conversation and the importance of the lost part of speech. Additionally, misunderstanding due to lost packets may lead to changes in the conversation’s flow and contents. This paper analyzes the intelligibility and misunderstandings in about 200 conversations of two distinct scenarios with three levels of bursty packet loss. We examine how packet-loss changes a conversation’s structure in terms of parameters obtained by a parametric conversation analysis. We also discuss how the conversation’s content differs between the two types of conversation.

Year: 2021
In session: Sprachsignalverarbeitung und Evaluation
Pages: 311 to 318