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A compressed video bitstream is sensitive to errors that may severely degrade the reconstructed images even when the bit error rate is small. One approach to combat the impact of such errors is the use of error concealment at the decoder without increasing the bit rate or changing the encoder. For spatial-error concealment, we propose a method featuring edge continuity and texture preservation as well as low computation to reconstruct more visually acceptable images. Aiming at temporal error concealment, we propose a two-step algorithm based on block matching principles in which the assumption of smooth and uniform motion for some adjacent blocks is adopted. As simulation results show, the proposed spatial and temporal methods provide better reconstruction quality for damaged images than other methods.

참고문헌 (18)

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  2. Temporal Error Concealment Using Two-Step Block Matching Principle , Chen, M.J.;Lo, S.Y. , Proc. of IEEE Int’l Conf. on Consumer Electronics / v.,pp.172-173, 2001
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  7. Best Neighborhood Matching: An Information Loss Restoration Technique for Block-Based Image Coding Systems , Wang, Zhou;Yu, Y.;Zhang, David , IEEE Trans. on Image Processing / v.7,pp.1056-1061, 1998
  8. Recovery of Lost or Erroneously Received Motion Vectors , Lam, W.M.;Reibman, A.R.;Liu, B. , Proc. of IEEE Int’l Conf. on Acoustics, Speech and Signal Processing’93 / v.,pp.V417-V420, 1993
  9. Error Concealment for Low Bit Rate Video over Burst-Packet-Loss Network , Pyun, J.Y.;Kim, H.S.;Jeong, J.W.;Lee, J.S.;Ko, S.J. , Int’l Technical Conf. on Circuits Systems, Computers and Comm. / v.1,pp.746-749, 2003
  10. A Hybrid Error Concealment Scheme for MPEG-2 Video Transmission Based on Best Neighborhood Matching Algorithm , Kang, L.W.;Leou, J.J. , IEEE Int’l Conf. on Multimedia and Expo / v.,pp., 2004
  11. Feedback-Based Error Control for Mobile Video Transmission , Girod, B.;Farber, N. , Proc. of IEEE / v.87,pp.1707-1723, 1999
  12. Standard Compatible Extension of H.263 for Robust Video Transmission in Mobile Environments , Steinbach, E.;Farber, N.;Girod, B. , IEEE Trans. on Circuits and Systems for Video Technology / v.7,pp.872-881, 1997
  13. Error Resilient Modified Inter-Frame Coding System for Limited Reference Picture Memories , Tomita, Y.;Kimura, T.;Ichikawa, T. , Int’l Picture Coding Symp. (PCS) / v.,pp.743-748, 1997
  14. A Class of Reversible Variable Length Codes for Robust Image and Video Coding , Wen, J.;Villasenor, J. , IEEE Int'l Conf. on Image Processing / v.,pp.II-65-II-68, 1997
  15. Reversible Variable Length Codes for Robust Image and Video Transmission , Wen, J.;Villasenor, J. , Conf. Record of the Thirty-First Asilomar Conf. on Signals, Systems & Computers / v.2,pp.973-979, 1997
  16. The EREC: An Error Resilient Technique for Coding Variable-Length Blocks of Data , Redmill, D.W.;Kingsbury, N.G. , IEEE Trans. on Image Processing / v.5,pp.565-574, 1996
  17. Compressed Video over Networks , Zhu, Q.;Wang, Y.;Reibman, A.R.(ed.);Sun, M.T.(ed.) , / v.,pp., 2000
  18. Spatio-Temporal Video Error Concealment with Perceptual Optimized Mode Selection , Belfiore, S.;Grangetto, M.;Magli, E.;Olmo, G. , IEEE Int’l Conf. on Acoustics, Speech and Signal Processing 2003 / v.5,pp.748-751, 2003

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