JPEG中不需要乘法的DCT逼近

Proceedings of Third International Conference on Electronics, Circuits, and Systems Pub Date : 1996-10-13 DOI:10.1109/ICECS.1996.584459

G. Rozinaj, A. Marcek

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引用次数: 3

摘要

提出了一种不需要乘法的离散余弦变换(DCT)逼近算法。该方法基于离散谐波信号的递归发生器。“速度/精度”比率可以根据输入规格进行调整。实际的精度和误差分析取决于DCT的长度。分析了在JPEG图像压缩中应用该算法的可能性。然而，近似方法在所有使用DCT的问题中都是可行的。我们对DCT近似的新方法适用于其他变换，如DFT。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Approximation of DCT without multiplication in JPEG

An original algorithm for the approximation of the discrete cosine transform (DCT) without multiplication is presented. The method is based on a recursive generator of discrete harmonic signals. The "speed/accuracy" ratio can be tuned due to input specifications. The actual accuracy and error analysis depend on the length of the DCT. We analyse the possibility of using our algorithm in JPEG image compression. However, application of the approximation method is possible in all problems using DCT. Our new approach to the DCT approximation is applicable to other transforms such as the DFT.

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Proceedings of Third International Conference on Electronics, Circuits, and Systems

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