This paper presents aspects of a study of different methods to mitigate the impact of packet loss in a wireless distribution network on the subjective quality of compressed high fidelity audio. The system was simulated in Matlab based on parameters of an 802.11a WLAN in multicast-mode and the Vorbis codec. To aid the selection of the most appropriate packet loss concealment strategy not only the additional bandwidth, the processing requirements or the latency need to be considered. One important differentiating factor is the perceived subjective audio quality. Therefore an accurate estimate of the subsequent audio quality is required. Several simulation based methods using psychoacoustic models of the human hearing system to quantify the subjective audio quality are compared.

Authors: Purat, Marcus; Ritter, Tom
Affiliation: Beuth Hochschule für Technik Berlin, Berlin, Germany
AES Convention: 127 (October 2009) Paper Number: 7943
Publication Date: October 1, 2009
Subject: Audio Networks

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