Evaluating perceived voice quality on packet networks using different random neural network architectures

Kapilan Radhakrishnan, Hadi Larijani

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)


    Voice over Internet Protocol (VoIP) is one of the fastest growing technologies in the world. In VoIP speech signals are transmitted over the same network used for data communications. The internet is not a robust network and is subjected to delay, jitter, and packet loss. It is very important to measure and monitor the quality of service (QoS) the users experience in VoIP networks; this is not an easy task and usually requires subjective tests. In this paper we have analyzed three non-intrusive models to measure and monitor voice quality using Random Neural Networks (RNN). A RNN is an open queuing network with positive and negative signals. We have assessed the voice quality based on various parameters i.e. delay, jitter, packet loss, and codec. In our approach we have used the Mean Opinion Score (MOS) calculated using a Perceptual Evaluation of Speech Quality (PESQ) algorithm to generate data for training the RNN model. We have studied two feed-forward models and a recurrent architecture. We have found that the simple feed-forward architecture has produced the most accurate results compared to the other two architectures.

    Original languageEnglish
    Pages (from-to)347-360
    Number of pages14
    JournalPerformance Evaluation
    Issue number4
    Publication statusPublished - 1 Apr 2011


    • voice quality
    • voice over internet protocol
    • random neural networks


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