DCDi by Faroudja (Directional Correlation Deinterlacing) is a digital enhancement method developed by Faroudja in 1996.
DCDi technology is primarily used for improving the image quality of low resolution images. The DCDi algorithm starts by deinterlacing images, using a number of techniques, including "Bad Edit Detection", which detects 24 frame/s film sources in 30 frame/s video streams, converting the stream back to 24 frame/s. The DCDi algorithm also employs edge detection to find the moving edges in a scene and adjust the angle of interpolation at each pixel so that the interpolation always follows the edge instead of crossing it. This eliminates staircasing and/or jagged edge artifacts.
These techniques won an Emmy Award from National Academy of Television Arts and Sciences in 2001.
The DCDi technique is often licensed and used in LCD and plasma television sets, as well as DVD and Blu-ray players.