本文提出离散余弦变换(DCT)的一种新的快速算法，其特点是变换长度任意，而且采用蝶形结构。

In this paper, a new fast algorithm to calculate discrete cosine transform (DCT) with arbitrary length by means of the butterfly structure is presented.

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表 5 提供了所有字符变换测评的计时结果，使用了 480 项计划长度。

Table 5 provides the timing results for all mutation benchmarks, using 480-item plan lengths.

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图案的变换说明直角臂的相对长度发生了变化。

Any shift in the position of those regions tells you that the relative lengths of the arms has changed.

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