The Design And Implementation Of 2-D DCT Based SIMD Architecture

Discrete Cosine Transform and Inverse Discrete Cosine Transform are wildly used in coding and decoding of image processing. So far, it has adopted by many internationalstandards like JPEG,MPEG1,MPEG2, MPEG4 and H26x etc. Usually people make it a module with ASIC flow to satisfy the requirement for real-time owing to its heavy quantity of computing.The paper introduces principle and effect of DCT/IDCT in image processing at first, and analyzes and studies various fast algorithms of DCT, summarizing the working for DCT fast algorithms and its VLSI implementation which has done by previous researchers.Based on characteristics of image process, combining DCT fast algorithms, on the purpose of improving speed and decreasing area and power, the thesis presented a way of DCT/IDCT hardware implementation. The way turns 2-D DCT/IDCT into two 1-D DCT/IDCT based on characteristic of row-column decomposition. In the designing of 1-D DCT/IDCT, we arrange DCT calculation timing, and employ SIMD architecture.At last, synthesize and verification for design has been done using Synopsys's EDA tools. The result shown that the design could complete the function of 8×8 DCT/IDCT with 125M clock frequency. Synthesize report show that the area of whole design is about 1389515.38μm2 with a technology library 0.18um.