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The discrete cosine transform (DCT) and its inverse (IDCT) are widely used in image and video compression standards. In this paper, we propose a novel unified architecture for DCT and IDCT based on adaptive recoding coordinate rotation digital computer (ARC). The proposed architecture requires two types of ARC rotators. In addition, an efficient adder and shifter-based scale factor approximation is...
Direct Digital Frequency Synthesizer (DDS) plays an important role in communication systems. In this paper, we propose a novel DDS architecture. Compared with the conventional lookup table (LUT) based DDS, the proposed one adopts the coordinate rotation digital computer (CORDIC) algorithm to accomplish phase-to-amplitude conversion. Due to the poor accuracy of the conventional CORDIC, an adaptive...
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