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    Dynamic adjustment of weighting and safety factors in playout buffers for enhancing VoIP quality

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    Authors
    Syed, Tazeen Shabana
    Epiphaniou, Gregory
    Safdar, Ghazanfar Ali
    Affiliation
    University of Bedfordshire
    Issue Date
    2014-10
    Subjects
    E-Model
    playout buffer
    safety
    VoIP
    
    Metadata
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    Abstract
    The quality of Voice over Internet Protocol (VoIP) calls is highly influenced by transmission impairments such as delay, packet loss and jitter, with jitter being manifested as one of the deleterious effects affecting its quality. A jitter buffer is usually employed at the receiver side to mitigate its effects by adapting its parameters in a trade-off between delay and packet loss. This paper proposes a novel de-jitter algorithm that adaptively changes the size of the playout buffer depending on the network states, in order to effectively handle the packet loss and delay, whereas E-model is used to quantify speech quality. Based on the statistics of the received packets, the adaptive playout buffer algorithm dynamically adjusts the weighting factor (α) and the safety factor (β) for regulating the delay and trade-off loss, thus maximizing the quality for VoIP.
    Citation
    Syed, T.S., Epiphaniou, G., Safdar, G.A. (2014) 'Dynamic adjustment of weighting and safety factors in playout buffers for enhancing VoIP quality', Science and Information Conference (SAI), 7-9 Oct. 2013, pp.810-815
    Publisher
    IEEE
    URI
    http://hdl.handle.net/10547/336094
    Additional Links
    http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6661834&queryText%3DDynamic+adjustment+of+weighting+and+safety+factors+in+playout+buffers+for+enhancing+VoIP+quality
    Type
    Conference papers, meetings and proceedings
    Language
    en
    Collections
    Centre for Wireless Research (CWR)

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