| 摘要 |
<p>A digital television special effect waveform generator produces a gate signal used for composing two video signals as a special effect, provided with a waveform having a soft width in which these two video signals are gradually alternated, according to the direct digital calculation of digital data consisting of a stating address, a central address and an aspect ratio of the waveform. As a result, a special effect waveform for smoothly alternating two video signals can be easily obtained with a comparatively simple digital circuit configuration prevented from the injurious influence of noise.</p> |
