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首页> 外文期刊>Journal of visual communication & image representation >An error resilient coding scheme for JPEG image transmission based on data embedding and side-match vector quantization
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An error resilient coding scheme for JPEG image transmission based on data embedding and side-match vector quantization

机译：基于数据嵌入和边匹配矢量量化的JPEG图像传输抗错编码方案

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摘要

For an entropy-coded Joint Photographic Experts Group (JPEG) image, a transmission error in a codeword will not only affect the underlying codeword but also may affect subsequent codewords, resulting in a great degradation of the received image. In this study, an error resilient coding scheme for JPEG image transmission based on data embedding and side-match vector quantization (VQ) is proposed. To cope with the synchronization problem, the restart capability of JPEG images is enabled. The objective of the proposed scheme is to recover high-quality JPEG images from the corresponding corrupted images. At the encoder, the important data (the codebook index) for each Y (U or V) block in a JPEG image are extracted and embedded into another "masking" Y (U or V) block in the image by the odd-even data embedding scheme. At the decoder, after all the corrupted blocks within a JPEG image are detected and located, if the codebook index for a corrupted block can be correctly extracted from the corresponding "masking" block, the extracted codebook index will be used to conceal the corrupted block; otherwise, the side-match VQ technique is employed to conceal the corrupted block. Based on the simulation results obtained in this study, the performance of the proposed scheme is better than those of the five existing approaches for comparison. The proposed scheme can recover high-quality JPEG images from the corresponding corrupted images up to a block loss rate (BLR) of 30%.
机译：对于熵编码的联合图像专家组（JPEG）图像，码字中的传输错误不仅会影响基础码字，而且可能会影响后续码字，从而导致接收到的图像质量大大下降。在这项研究中，提出了一种基于数据嵌入和边匹配矢量量化（VQ）的JPEG图像传输的容错编码方案。为了解决同步问题，启用了JPEG图像的重新启动功能。提出的方案的目的是从相应的损坏图像中恢复高质量的JPEG图像。在编码器中，提取出JPEG图像中每个Y（U或V）块的重要数据（码本索引），并通过奇偶数据将其嵌入到图像中的另一个“蒙版” Y（U或V）块中。嵌入方案。在解码器处，在检测并定位了JPEG图像中的所有损坏块之后，如果可以从相应的“遮罩”块中正确提取出损坏块的​​代码簿索引，则提取的代码簿索引将用于隐藏损坏块;否则，采用边匹配VQ技术来隐藏损坏的块。根据本研究获得的仿真结果，提出的方案的性能优于现有的五种比较方法。所提出的方案可以从相应的损坏图像中恢复高质量的JPEG图像，直至块丢失率（BLR）达到30％。

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