A New Optimum-Word-Length-Assignment (OWLA) Multiplierless Integer DCT for Lossless/Lossy Image Coding and Its Performance Evaluation
A New Optimum-Word-Length-Assignment (OWLA) Multiplierless Integer DCT for Lossless/Lossy Image Coding and Its Performance Evaluation
复制标题
一种新的无损/有损图像编码的最佳字长分配(OWLA)无乘数整数DCT及其性能评估
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Iwahashi
中科院分区：
文献类型：
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作者：
S. Chokchaitam;M. Iwahashi
最近，我们提出了一种无乘法器的1D Int-DCT，通过将浮点乘法近似为移位和加法运算，对我们之前提出的Int-DCT进行了改进。无乘法器的1D Int-DCT可以很好地操作无损编码和有损编码。然而，我们的无乘法器的1D Int-DCT并没有集中在如何分配字长的浮点乘法器近似尽可能短，以减少硬件复杂度。在本文中，我们提出了一个新的最佳字长分配（OWLA）无乘法器的整数DCT。除了廉价的硬件复杂性，新的OWLA无乘法器的1D Int-DCT实现高编码性能的无损和有损编码。无损/有损编码标准被应用于评估所提出的Int-DCT的编码性能相比，其他Int-DCT。
Recently, we proposed a multiplierless 1D Int-DCT improved from our previous proposed Int-DCT by approximating floating multiplications to bit-shift and addition operations. The multiplierless 1D Int-DCT can be well operated both lossless coding and lossy coding. However, our multiplierless 1D Int-DCT is not focused on how to assign word-length for floating-multiplier approximation as short as possible for reduction of hardware complexity. In this paper, we propose a new Optimum-Word-Length-Assignment (OWLA) multiplierless Int-DCT. Apart from inexpensive hardware complexity, the new OWLA multiplierless 1D Int-DCT achieves high coding performance in both lossless and lossy coding. The lossless/lossy coding criterion is applied to evaluate coding performance of the proposed Int-DCT comparing to those of the others Int-DCT.
影响因子：
5.4
作者：
W. B. Pennebaker;Joan L. Mitchell
通讯作者：
W. B. Pennebaker;Joan L. Mitchell