| 摘要 |
<p>PURPOSE:To enable the inhibition of a moire pattern, by reducing the size of pixels to superimpose a graphic figure or a character thereon. CONSTITUTION:A PPI radar video signal 100 and a trigger signal 102 are sampled 11 and memorized 12. On the other hand, a bearing signal 101 and a signal 102 are converted 13 to rectangular coordinates to be memorized 12 as address signal 110. At a video memory 12, the signal 100 is stored at the address as specified by the signal 110 and with the inputting of a synchronous signal 104 from a synchronous signal generating section 6, the signal 100 is read out to output a video data signal 111. A video conversion means 2 receives inputs of signals 111 and 104 to form a video data signal finer than a pixel lattice of the signal 111. A signal to be shown on a display is stored 7, read out corresponding to the signal 104 and made to overlap the video signal with a scan converter section 21. The resulting video signal 112 is inputted into a video converting section 22 to convert and a radar video signal 103 is outputted.</p> |
