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Robust transmission of packet video through dispersive packetization and error concealment

In this paper we present a new coding and packetization approach for intraframe coded video transmission, based on space-frequency dispersion. Subband-decomposed video data is packetized so that data appearing in any one packet is highly dispersed in both space and frequency. Each packet is a description of the frame at various points in space and frequency. Any errors arising from packet loss are spread across the frame and this allows easy error concealment. We compare our method to the more conventional block-based packetization scheme and illustrate its advantages in both PSNR and subjective visual quality.