| 摘要 |
<p>In video processing there is a need to preserve image quality when de-interlacing, e.g. as may be required for conversion of a video signal from an interlaced video format to a progressive scan format. Such imperfections as combing artifacts, degradation of diagonal edges and "ghosts" are a problem in current video processing. Typically, a system for video processing has a tuner (102) and a de-interlacing circuit (106) which is coupled to the tuner. The de-interlacing circuit is configured to: store (602) at least a portion of a current field of a digital video signal, the current field including a current line, the current line including a current pixel to be interpolated; store (602) at least a portion of a preceding field that immediately precedes the current field in the digital video signal; store (602) at least a portion of a succeeding field that immediately succeeds the current field in the digital video signal; examine (604) the preceding and succeeding fields for motion at a location of the current pixel to be interpolated; and determine (606) whether or not any motion at the location is less than a threshold. In the modified system described herein, the de-interlacing circuit (106) is configured to: select (608), from the current field, a set of nearest neighbor pixel values to the current pixel to be interpolated, when it is determined that the motion at the location is equal to or greater than the threshold; and provide (610) the set of nearest neighbor pixel values as input to a median function to determine an interpolated pixel value for the current pixel value to be interpolated. A machine implemented method of video processing, and a storage medium storing instructions for implementing this method are also disclosed.</p> |
