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2D-Bert: Two dimensional burst error recovery technique
, Article 2007 15th International Conference on Software, Telecommunications and Computer Networks, SoftCOM 2007, Split - Dubrovnik, 27 September 2007 through 29 September 2007 ; 2007 , Pages 411-415 ; 9789536114931 (ISBN) ; Kialashaki, H ; Lakdashti, A ; Sharif University of Technology
2007
Abstract
Compressed images such as JPEG when transmitted over communication channels are susceptible to channel noise and/or erasure, which causes losses of blocks of pixels or macroblocks. Recovery of a large block in an image is a difficult task. In this paper we propose a novel method that addresses this problem and can exactly recover a lost block. Moreover, the proposed algorithm is fast enough to be implemented in real time. Simulation results show that our method is faster than previous methods proposed in the literature with less distortion
A fast and adaptive boundary matching algorithm for video error concealment
, Article 4th International Conference on Signal Processing and Communication Systems, ICSPCS'2010, Gold Coast, QLD, 13 December 2010 through 15 December 2010 ; 2010 ; 9781424479078 (ISBN) ; Mohammadiha, N ; Kasaei, S ; Sharif University of Technology
2010
Abstract
Low-complexity error concealment techniques for missing macroblock (MB) recovery based on the boundary matching principle are extensively studied and evaluated. In this paper, an improved boundary matching algorithm (BMA) using adaptive search is presented to conceal channel errors in inter-frames of video images. The proposed scheme adaptively selects proper candidate regions to conceal the artifact of a lost block. The candidate regions are examined based on analyzing motion activity of the neighboring MBs. Simulations show that the proposed scheme outperforms both on PSNR and visual quality obviously of about 1-4dB compared to existing methods