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Comments on: Novel full-search schemes for speeding up image coding using vector quantization

机译:评论:用于使用矢量量化加快图像编码的新颖的全搜索方案

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Vector quantization (VQ) is a well-known signal compression method. In the framework of VQ, fast search method is one of the key issues because it is the time bottleneck for practical VQ applications. Based on the law-of-cosines and the triangle inequality, the previous work [C.C. Chang, I.C. Lin, Novel full-search schemes for speeding up image coding using vector quantization, Real-Time Imaging 10 (2004) 95-102] has proposed a very efficient fast search method for VQ encoding. However, there still exist a large computational redundancy in its Scheme 1 and some incorrect expressions in its Scheme 2. This paper aims at improving these two issues further by (1) proposing a more efficient implementation method for the Scheme 1 and (2) rewiring the Scheme 2 for correctness. Meanwhile, a mathematical analysis on computational complexity and the experimental results are given to show the effectiveness of the proposed implementation method of the Scheme 1 in this paper.
机译:矢量量化(VQ)是一种众所周知的信号压缩方法。在VQ框架中,快速搜索方法是关键问题之一,因为它是实际VQ应用程序的时间瓶颈。基于余弦定律和三角形不等式,以前的工作[C.C.张,IC Lin,Real-Time Imaging 10(2004)95-102]提出了一种使用矢量量化来加快图像编码速度的新颖的全搜索方案,已提出了一种非常有效的VQ编码快速搜索方法。但是,方案1中仍然存在大量的计算冗余,方案2中存在一些不正确的表达式。本文旨在通过(1)为方案1建议一种更有效的实现方法,以及(2)重新布线来进一步改善这两个问题。方案2的正确性。同时,对计算复杂度进行了数学分析,并给出了实验结果,证明了所提出的方案1的实现方法的有效性。

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