本文提出了一种离散余弦变换 (DCT)电路的并发故障检测结构。DCT采用 B.G.L ee算法蝶型结构实现 ,检测采用的方法是基于算法的并发故障检测容错方法。与其它并发故障检测容错结构相比 ,本文提出的并发故障检测 DCT结构在硬件及时间冗余度上均优越 This paper presents a Discrete Cosine Transform (DCT) circuit of the concurrent fault detection structure. DCT adopts butterfly structure of B.G.Lee algorithm, and the method used in detection is algorithm-based concurrent fault detection and fault tolerance. Compared with other concurrency fault detection fault-tolerant structures, the proposed DCT structure with concurrent fault detection is superior in both hardware and time redundancy