| 摘要 |
<p>PURPOSE:To perform the most suitable TV signal processing using motion information by obtaining a signal corresponding to the amplitude like the absolute value of an inter-frame or inter-field operation signal of a chrominance signal component and taking out its low frequency component and using it as motion information. CONSTITUTION:A composite color TV signal inputted to an input terminal 1 is delayed by a memory 7 having a 2-frame synchronous capacity, and the difference signal between two frames is calculated by a subtracting circuit 8. The polarity of this chrominance signal is inverted in every 1H and is equal to that of the signal delayed synchronously by two frames; and when the difference is operated, the signal is zero in still pictures but a significant signal appears in animation parts, and a signal including motion information of color signals is obtained as the output of a BPF 9 if the component with a subcarrier frequency fac as the center is extracted by the BPF 9. Consequently, the absolute value of the output of the BPF 9 is operated by an absolute value circuit 10 in a motion coefficient converting circuit 4 and its low frequency component is extracted by an LPF 5.</p> |
