Letter-box filtering circuit and method using the same

摘要

A letter-box filtering circuit and a method of using the same that includes a preprocessing filter circuit and a filtering circuit to reduce or correct the round-off errors generated when displaying an image of 16:9 on a screen of 4:3 in a digital image processing. The letter-box filtering circuit can display the down sampled image based on the 16:9 image without any distortion or reduced distortion.