| 摘要 |
<p>A circuit for controlling the display of a digital video signal includes a video random access memory (1) for storing original video data to be displayed on a cathode ray tube display, a main look-up table memory (5) containing expanded color display data and arranged to be addressed by the output of the video random access memory (1), with its output connected to corresponding digital-to-analog convertors (8, 9, 10) for providing an analog signal for subsequent display, a buffer look-up table memory (13) connected to provide new display data to the main look-up table memory (5), with such new display data being supplied to the buffer look-up table memory (13) from a central processing unit, and control circuit (11, 3, 24) connected to both look-up table memories (5, 13) to cause display data to be raplaced in the main look-up table memory (5) by display data read into the buffer look-up table memory (13) from the central processing unit during a non-access operation of the video random access memory (1).</p> |
