| 摘要 |
<p>PURPOSE:To eliminate missing in detecting the move in a receiver, and to improve the quality of a reproduced picture by detecting a moving component not detectable on the reception side preliminarily on the transmission side, and adding an additional signal that uses a color signal with which a moving can be detected on the reception side, then transmitting the component. CONSTITUTION:Signals R, G, B which are the image signals obtained by scanning by a sequential scanning camera 1 at a frame period of 1/60sec., are converted to a luminance signal Y and color difference signals I, Q in a conversion circuit 2, and inputted to a scanning conversion circuit 5. A moving detection circuit 4, upon detecting the time frequency 30Hz-component of the Y-signal, closes a switch 6 so that the additional signal Q' from a signal generator 3 is transmitted to an adder 7. In the adder 7, a Q-signal from the circuit 5 and the additional signal Q' are added with each other, and thus obtained color signal Q' is inputted to an encoder 8 together with a luminance signal Y' and another color signal I'. The color signals I', Q' are modulated in the encoder 8 by using a color subcarrier wave fsc, and multiplexed with the luminance signal, then transmitted. The additional signal added to the Q-signal is made such a signal as detectable in a moving detection (difference between two frames) on the reception side.</p> |
