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ESTIMATION OF EDGE DIRECTION FOR BLOCK ERROR CONCEALMENT USING HYPOTHESIS TESTING PROBLEM

机译:利用假设检验问题估计块错误掩盖的边缘方向

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In this paper, we present an error concealment technique that estimates the edge directions of lost block. We propose an adaptive block pair selection algorithm to estimate the edge direction of lost block in wavelet domain. For this estimation to be made, a hypothesis-testing problem is applied to the variance of wavelet coefficients. Here, we use an F-distribution. The strong edge has large amounts of variance because of its large coefficients. Therefore, our method decides the edge directions of the lost block from hypothesis-testing problem using the variance of the wavelet coefficients of the neighbouring blocks. The proposed method outperforms the previous methods that only used a predefined set of neighbouring blocks.
机译:在本文中,我们提出了一种错误隐藏技术,用于估计丢失块的边缘方向。我们提出了一种自适应块对选择算法来估计小波域中丢失块的边缘方向。为了进行这种估计,将假设检验问题应用于小波系数的方差。在这里,我们使用F分布。强边缘由于系数大而具有很大的方差。因此,我们的方法利用相邻块的小波系数的方差从假设检验问题中确定丢失块的边缘方向。所提出的方法优于仅使用预定义的一组相邻块的先前方法。

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