Error Concealment Techniques for Encoded Video Streams
This work
in the
Video and Image Processing Laboratory (VIPER)
involves techniques to recover errors in MPEG
encoded video streams transmitted over ATM networks.
The approach aims at reconstructing each lost pixel by
spatial interpolation from the nearest undamaged pixels
and/or interpolation of the motion vectors. Moreover, a new
technique for packing ATM cells with compressed data is also described. The
idea is to pack high priority cells with group of pictures(GOP), Picture and
Slice header information and pack integral numbers of macroblocks into single
cells. Figure 1 is a frame from the Jane sequence that has lost ten
percent of its macroblocks due to dropped ATM cells.
Figure 2 depicts the reconstructed version using
spatial and temporal interpolation. Figure 3 is a block diagram showing our approach to
video packetization using ATM.
Figure 1
Figure 2
![[ATM Cell Packing Scheme]](atm_figure3.gif)
Figure 3
Publications
Our recent publications in
Image and Video Compression.
A complete set of our recent publications are available
here.
Address all comments and questions to
Professor
Edward J. Delp.
Professor Edward J. Delp