Method and system for eliminating edge effects at the beginning of frame in video signals

摘要

Described are a method and an apparatus for processing video signals to be displayed on a digital display device without edge effects or artifacts at the end of line intervals. Specifically, video signals consist of a plurality of pixel frames, with each of the pixel frames further consisting of a plurality of pixel lines. A typical video signal processing system includes a horizontal format converter (HFC) (404 and 405) for converting signal formats in horizontal direction. A typical HFC includes a filter having a plurality of pixel taps (910 and 917) for storing pixels that can be used to create a current pixel to be displayed on a digital display device. However, at the end of a pixel line, there are no pixels available for all pixel taps. This causes edge effects/artifacts on the digital display device along the horizontal direction at the end of line intervals. The edge effect and artifact problem is solved by repeating (902 and 906) at least one pixel that is located on or preceding to the end position in each of pixel lines.