Optimal Interleaving for 3-D Zerotree Wavelet Video Packets Over Burst Lossy Channels
Yi Zhao, Stanley C. Ahalt, Jianyu Dong · 2006
Burst packet loss imposes significant quality degradation in wireless video streaming applications. This paper proposes a near-optimal packet interleaving method that maximizes the quality of 3D wavelet video streamed over burst lossy channels with error concealment. The proposed method consists of two steps: (1) spatial interleaving is conducted during packetization so that the damage of the packet loss is dispersed; and (2) temporal interleaving is applied to minimize the expected distortion of lost packets at the receiver under given delay constraints. To allow real-time implementation, an iterative exchange-based algorithm is developed to reduce the computational complexity to O(N/sup 2/). In addition, to simplify estimating the characteristics of time-varying channels, a novel measurement, "temporal neighbor packet distance", is proposed as an alternative optimization criterion of the expected distortion. Experimental results show that the proposed interleaving method can improve the effect of error concealment by up to 50%.