An High Quality Image Scaling Engine for Large-scale LCD

In this paper, the architecture of the image scaling engine was introduced firstly. Then a new zooming algorithm named two-point cubic spline was proposed. Based on the proposed algorithm, an image scaling engine for large-scale LCD has been designed. The hardware implement of the proposed algorithm is simpler than that of bicubic. It is also faster than that of bicubic in computation time. But it can get an image quality closed to bicubic. So the proposed algorithm gets a high performance-to-price ratio. The interpolation filter and timing constraint conditions of the image scaling engine were also discussed in this paper. The image scaling engine was described in Verilog HDL and implemented in FPGA. The result of FPGA verification showed that the image scaling engine generated a good image quality both in static image and in dynamic video.