SYSTEM AND METHOD TO IMPROVE THE QUALITY OF REPRODUCED IMAGES ON A FILM TO VIDEO TRANSFER DEVICE

摘要

A system and method to improve the quality of reproduced images on a film to video transfer device (12) by scanning extra lines to reduce vertical aliasing and performing vertical sample rate reduction (61) to produce the correct number of video output lines. This invention also has the effet of reducing high frequency noise as a result of the vertical sample rate reduction which produces a line filtering. In the present invention, more lines are scanned than normal and the distance between lines is reduced so that the larger number of lines covers the original film image area. This has the effect of increasing the sampling frequency in the vertical direction and therefore reducing aliasing. To provide the correct number of lines in the output of the film to video sample, rate reduction is performed. Sample rate reduction is performed by filtering multiple adjacent lines to remove any high frequency content that would be aliased at the lower rate. Lines are discarded in a predefined sequence that is a function of the fractional reduction rate.