An algorithm for source coding
IEEE Transactions on Information Theory
An efficient error concealment implementation for MPEG-4 video streams
IEEE Transactions on Consumer Electronics
Rayleigh fading channels in mobile digital communication systems .I. Characterization
IEEE Communications Magazine
Error-resilient video coding in the ISO MPEG-4 standard
IEEE Communications Magazine
IEEE Transactions on Image Processing
Detection and concealment of transmission errors in H.261 images
IEEE Transactions on Circuits and Systems for Video Technology
Second-order derivative-based smoothness measure for error concealment in DCT-based codecs
IEEE Transactions on Circuits and Systems for Video Technology
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In this paper, we present a low-complexity 'reversible variable length code' (RVLC) decoding scheme for MPEG-4 video that recovers more blocks and sometimes more macroblocks (MBs) from error propagation region of corrupted video packets, as compared to the MPEG-4 scheme. The remaining blocks and MBs are concealed. Simulation studies have been carried out to show that the proposed scheme achieves better data recovery, both in terms of peak-signal-to-noise ratio (PSNR) and perceptual quality. In addition, we present more conditions for error detection than those suggested in MPEG-4, discuss properties of error propagation in corrupted video packets, and provide the RVLC codeword structure. The use of RVLC code structure will enable the decoding in both directions by using only one code table, instead of separate tables used for forward and backward decoding. Since the scheme is purely decoder based, the compliance with the standard is fully maintained. It is very simple for the decoder to keep track of the additional blocks/MBs recovered by the proposed scheme. Therefore, the data recovery scheme suggested in MPEG-4 can still be used as default scheme.