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对二维信号实时处理涉及大量的复数运算且对运算速度要求很高,因此二维有限长单位脉冲响应滤波器(2D-FIR)的结构比一维滤波器要复杂得多。通过对二维滤波器重要运算单元复数乘法的分析、优化减小了其所需实数乘法器的个数。采用QuartusⅡ软件综合可以得到算法优化后的二维滤波器占用逻辑资源减少了16,工作速度提高了13%。
Therefore, the structure of two-dimensional finite-length unit impulse response filter (2D-FIR) is much more complex than that of one-dimensional filter. Because real-time processing of two-dimensional signals involves a large number of complex operations and requires high computational speed. Through the analysis of the complex multiplication of the important operation unit of the two-dimensional filter, the number of real multipliers needed by the optimization is reduced. Using Quartus Ⅱ software synthesis algorithm can be optimized by two-dimensional filter occupancy logic resources reduced by 16, the working speed increased by 13%.