Published Paper Details:

: Discrete cosine transform (DCT) is a widely used tool in image and video compression applications. Recently, the high-throughput DCT designs have been adopted to fit the requirements of real-time application. Operating the shifting and addition in parallel, an optimized adder tree (OAT) is proposed to deal with the truncation errors and to achieve low-error and high-speed discrete cosine transform (DCT) design. Instead of the 12 bits used in previous works, 9-bit Distributed Arithmetic was proposed. DA-based DCT design with an optimized adder tree (OAT) is the proposed architecture in which, OAT operates shifting and addition in parallel by unrolling all the words required to be computed. Furthermore, the Error-Compensated Circuit alleviates the truncation error for high accuracy design. Based on low-error OAT, the DA-precision in this work is chosen to be 9 bits instead of the traditional 12 bits. Therefore, the hardware size and cost is reduced, and the speed is improved using the proposed OAT.