| 摘要 |
PURPOSE:To attain stable discrimination with respect to the motion detection circuit which obtains a signal used to discriminate a still picture area and a moving picture area in a digital television receiver from a video signal. CONSTITUTION:An output of a frame correlation detection circuit 2 is inputted to one input of a comparator circuit 3 and a threshold level is inputted to the other input of the comparator circuit 3. When an output of the comparator circuit 3 indicates 'motion' ('1'), a signal via delay circuits 5,6 and an OR circuit 7 controls a changeover circuit 8 to decrease a threshold level for the discrimination of a picture element at the left side and a picture element at the lower picture element of the relevant picture element thereby easily discriminating 'the motion', and then stable motion detection is implemented. |
