| 摘要 |
When processing a time varying effect that positions an input image into an interlaced output image, the input image is filtered first. The filtered input image then is positioned in the output image by mapping one line in the output image to one line in the input image space. The input image may be filtered once and the filtered image may be used to create all output fields for the effect. Thus, the overhead per output field used to create the output field from the input image is reduced in comparison to filtered subpixel positioning. In addition, equipment that is capable of performing only unfiltered subpixel positioning may use the filtered input image to reduce interlaced artifacts. |
