| 主权项 |
1. A video decoder comprising:
an adaptive comb configured to generate a combed video image from an image signal; and an adaptive comb controller comprising:
at least one of a vertical image correlator and a spatio-temporal image correlator configured to generate an output signal representing at least one of a vertical image correlation value of the image signal and a spatio-temporal image correlation value of the image signal,a field motion detector configured to determine a field motion value as a function of field motion between adjacent fields of the combed video image and to, based thereupon, generate the output signal representing the field motion value; andcontroller logic configured to generate a control signal to cause the adaptive comb to selectively comb using 2D combing, frame combing, or field combing based upon the output signal; wherein the adaptive comb comprises at least one blender configured to receive signals from a frame comb and a field comb; wherein the at least one blender is configured to selectively combine the received signals dependent on the control signal; wherein the control signal causes the frame comb to process a region dependent on the spatio-temporal image correlator determining the field motion value to be less than a first motion threshold value; and wherein the control signal causes the field comb to process the region dependent on the spatio-temporal image correlator determining the field motion value to be indicative of motion, to be greater than the first motion threshold value, and to be less than a second motion threshold value. |
