1. A Cell-Loss Concealment Technique for MPEG-2 Coded Video Jian Zhang, John F. Arnold, and Michael R. Frater IEEE Transaction on Circuit and System for video Technology June 2000

2. Error Resilience Techniques Error detection Resynchronization Data recovery Concealment … MB header slice header Resync. marker

3. Boundary Matching Alg.(BMA) Lost MB Lost MV Prev. FrameCurrent Frame if pixel values weighted sum compared to the boundary is the minimum, this is the lost block.

4. Decoder Motion-Vector Estimation Algorithm (DMVE) Lost MB Lost MV Prev. FrameCurrent Frame Full search or fast search in prev. (or Ref.) Frame found

5. Experimental Results Original error-free PSNR:28.38db bus:30.71dB

7. DMVE with Resynchronisation DMVE has better quality when each slice has more macroblocks.

8. using the MV from the macroblock above DMVE Flower Garden

9. Bus using the MV from the macroblock above DMVE

10. Conclusion DMVE algorithm can significantly increase decoded video quality even at high cell-loss rates(1% or more) Developed a number of different implementations of DMVE algorithm which allowed a trade-off to be mode between extra computational complexity