| 摘要 |
In, for example, a motion compensated video standards converter (Figure 1) wherein blocks in a first field or frame of a video signal are each compared with a plurality of blocks in the following field or frame of the video signal for deriving a plurality of motion vectors representing the motion of the content of respective blocks between the first field or frame and the following field or frame, a respective motion vector is derived, from the plurality of motion vectors for each pixel in each block of each input field or frame by luminance matching each pixel in an input field or frame with the pixels, in the previous and following input fields or frames, pointed to by said plurality of motion vectors, and the respective luminance matches are checked against a threshold value determined (37, 38 in Figure 38; Figure 41) in dependence on the local frequency content of the picture corresponding to the video signal. |
