A digital frequency synthesizer without ROM look up table is presented, a piecewise linear interpolation scheme is used to approximate a sinusoid function.
该方法使用具有分段连续的线性分段来近似正弦函数曲线的第一象限部分，根据正弦曲线的对称性，构成完整的正弦曲线。
Take the basic theory of IIR filters, a scheme of High- speed IIR Digital Filters hardware implementation is worked out using with look up table.
本文在基本的像素处理算法的基础上，提出了一种基于查找表的快速平滑插值算法。
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