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Evaluation of Packet Loss Distortion in Audio Signals

Audio streamed over best effort packet switched networks under real-time requirements may be distorted by lost or delayed packets. In this work triple stimulus hidden reference subjective tests are used to evaluate the perceptual quality of audio signals exposed to packet loss. The effects of packet loss combined with both very simple and very complex error concealment schemes are evaluated, together with four di®erent packet loss rates and five audio clips. Results show statistically significant differences between different packet loss rates, error concealment schemes and audio clips. Results are also compared with output from an objective audio quality evaluation tool (PEAQ).

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