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文中提出了一种快速离散余弦变换（ＦＣＴ）电路的并发错误检测（ＣＥＤ）结构．为了达到１００％ 的故障覆盖率，ＦＣＴ采用基于第３类离散余弦变换的Ｂ．Ｇ．Ｌｅｅ 算法蝶型结构实现．检测采用的方法是基于算法的并发错误检测容错方法，因为基于算法的容错（ＡＢＦＴ）技术的硬件冗余量较少．对所提出的结构，文中证明了其１００％ 的故障检测能力．但在实际应用中，由于有限字长效应会带来误差，因此文中分析了有限字长效应对系统的吞吐量及故障覆盖率的影响，并给出了结论
This paper presents a fast discrete cosine transform (FCT) circuit concurrency error detection (CED) structure. In order to achieve 100% fault coverage, FCT uses B based on the third type discrete cosine transform. G. Lee algorithm butterfly structure to achieve. The method used for detection is based on algorithmic concurrency fault detection fault tolerance, because algorithmic based fault tolerance (ABFT) has less hardware redundancy. For the proposed structure, the paper proves its 100% fault detection capability. However, in practice, due to the finite word length effect will bring error, so the paper analyzes the finite word length effect on system throughput and fault coverage, and gives the conclusion