基于DA算法的二维DCT的FPGA实现

研究了一种采用现场可编程门阵列(FPGA)实现超高性能二维离散余弦变换(DCT)的方法。在DCT算法结构上利用了变换的可分离性和行列的可分解性采用行列分解的方法将二维DCT转换为2个串行的一维DCT实现,同时采用了基于分布算法(Distributed Arithmetic)的乘法累加结构,从而极大地减少了硬件资源需求,提高了运算速度,使图像处理的实时性得到了大幅提高。最后还给出了FPGA的实现和仿真结果。

FPGA Implementation of 2-D DCT-based Distributed Arithmetic

This paper presents a very highperformance 2D Discrete Cosine Transform(DCT) processor using the Field Programmable Gate Array(FPGA) for realtime applications.The architecture exploits the transform separability and uses a rowcolumn decomposition to implement a 2D DCT using two 1D DCT in series.The row and column processors are realized using multiplieraccumulator based on the Distributed Algorithm(DA) techniques,which has been contributed to reduce hardware requirement and achieve high speed operation.At the end of this paper,the FPGA implementation and simulation results are provided.