not matter, and focused on the average packet loss rate as the most Video communication is often afflicted by various forms of losses, such as packet loss over the Internet. This paper examines the question of whether the packet loss pattern, and in particular the burst length, is important for accurately estimating the expected mean-squared ermr distortion. Specifically, we (1) verify that the loss pattern does have a significant effect on the resulting distortion, (2) explain why a loss pattern, for example a burst loss, generally produces a larger distortion than an equal number of isolated losses, and (3) propose a model that accurately estimates the expected distortion by explicitly accounting for the loss pattern, inter-frame error propagation, and the correlation between error frames. The accuracy of the proposed model is validated with JVTH.26L coded video and previous frame concealment, where for most sequences the total distortion is predicted to within f0.3 dB for burst loss of length two packets, as compared to prior models which underestimate the distortion by about 1.5 dB. Furthermore, as the burst length increases, our prediction is within *0.7 dB, while prior models degrade and underestimate the dis- . . " Iimportant attribute to consider. Recently, c5.61 identified that burst length is important and should he explicitly considered. In this paper, we (1) verify that the packet loss pattern does have a significant effect on the resulting distortion, (2) explain why a loss pattern, for example a burst loss, generally produces a larger distortion than an equal number of isolated losses, and (3) propose a model that accurately estimates the expected distortion by explicitly accounting for the loss pattern. To estimate the distortion the proposed model explicitly considers the effect of different loss patterns, including burst losses and separated (non-consecutive) losses spaced apart by a lag, and accounts for inter-frame error propagation and the correlation between error frames. The proposed model provides a significantly more accurate estimate of the distortion resulting from different loss events, compared to prior models. Tne accuracy is validated for four video test sequences coded with the emerging IVT/H.Z6L standard. This paper continues in Section 2 by reviewing prior models for estimating the distortion produced by packet loss. Section 3 presents the proposed model, and specifically focuses on the cases of burst losses and separated (non-consecutive) losses spaced apart tonion OY over 3 atl.
Liang et al. REF extended this work to incorporate the effect of different loss patterns.
Analysis of packet loss for compressed video: does burst-length matter?
2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03).
2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03).
Computer Science