| 摘要 |
<p>PURPOSE:To prevent the content of a former display area from remaining in a new display area, by attenuating the data of the former display area. CONSTITUTION:The information signal sent out from a radar apparatus is supplied to an address calculating part 12 and an A/D converting part 13 through an interface part 11. The radar video signal in the information signal is digitalized by the converting part 13 while the digitalized signal is written in an image memory part 16 through a computor 15. This writing operation is performed by successively calculating the address to be written of a memory part based on the information signal and a display area indicating data by a writing address calculating part 12 to supply the same to the memory part 16. On the other hand, an attenuation processing control part 26 indicates the same address as the address of written address to the memory part 16. At this time, the memory part 16 outputs the address data from the control part 26 to an attenuation operating part 27. This operating part 27 repeats operation so as to attenuate data while receives control and renews all image data.</p> |
