Prescription-based error concealment technique for video transmission on error-prone channels
Journal of Visual Communication and Image Representation
Power consumption optimization and delay minimization in MANET
Proceedings of the 6th International Conference on Advances in Mobile Computing and Multimedia
SIP '07 Proceedings of the Ninth IASTED International Conference on Signal and Image Processing
Improved algorithm of error-resilient entropy coding using state information
ACIVS'07 Proceedings of the 9th international conference on Advanced concepts for intelligent vision systems
An efficient video watermarking scheme with luminance differential DC coefficient modification
PCM'07 Proceedings of the multimedia 8th Pacific Rim conference on Advances in multimedia information processing
Video streaming application over WEAC protocol in MANET
Journal of Computer and System Sciences
An improved reversible data hiding-based approach for intra-frame error concealment in H.264/AVC
Journal of Visual Communication and Image Representation
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In this paper, error-resilient video coding schemes based on data-embedding techniques are proposed for the H.263+ codec. Data embedding, popularly applied to secret hiding and digital watermarking, is now used to convey error recovery information to the decoder via a covert channel, without causing significant increase in transmission bitrate. Our embedded information provides implicit macroblock (MB) delimiters for resynchronization in presence of channel errors. In this way, the decoder is capable of isolating erroneous MBs with the extracted information. A set of variational schemes is proposed, extensively analyzed, and compared to the competitive counterparts (e.g., the original H.263+ TMN8 and its synchronization-enhanced version) at the same bitrate. Experimental results show that our data embedding process decreases the average peak signal-to-noise ratio (PSNR) in error-free conditions by 0.3 dB (light data embedding) to 1.8 dB (heavy data embedding), but it is capable of achieving a significant PSNR improvement up to 2 and 9.5 dB when the bit error rate is 10-5 and 10-3, respectively. We also provide suggestions of how to adaptively apply the proposed schemes for different channel error conditions and different video contents.