Abstract
Abstract Intra macroblock refreshment is an effective approach for error-resilient video coding. In this paper, in addition to intra coding, we propose to add two macroblock coding modes to enhance the transmission robustness of the coded bitstream, which are inter coding with redundant macroblock and intra coding with redundant macroblock. The selection of coding modes and the parameters for coding the redundant version of the macroblock are determined by the rate-distortion optimization. It is worth mentioning that the end-to-end distortion is employed in the optimization procedure, which considers the channel conditions. Extensive simulation results show that the proposed approach outperforms other error-resilient approaches significantly; for some video sequences, the average PSNR can be up to 4 dB higher than that of the Optimal Intra Refreshment approach.
Highlights
The H.264/AVC [1] video coding standard provides higher coding efficiency and stronger network adaptation capability in comparison with all the previously developed video coding standards
When the hybrid-coded video bit-stream is transmitted over packet loss networks, it suffers from error propagations and this leads to the well-known drifting phenomenon [2,3]
The redundant quantization parameter (QP) value is v, pixel i is predicted from pixel i + mv(v) in the previous frame, the prediction residual ein is quantized to ein,v
Summary
The H.264/AVC [1] video coding standard provides higher coding efficiency and stronger network adaptation capability in comparison with all the previously developed video coding standards. Loss-aware end-to-end rate-distortion optimized intra macroblock refreshment algorithm, which is currently the best known way for determining both the correct number and placement of intra macroblocks for error resilience Redundant coding is another effective tool for robust video communication over lossy network. The parts of foreground, which is the Foreman face area in this frame, are strongly protected with intra coding and/or redundant coding Note both the macroblock type and QP value are optimized in the RD optimization process, which are presented . The redundant QP value is v, pixel i is predicted from pixel i + mv(v) in the previous frame, the prediction residual ein is quantized to ein,v For those intra and inter macroblocks with redundant coding, the probability of receiving the primary macroblock is 1 - p. In order to have fair comparison with the Optimal Intra approach
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