| 摘要 |
<p>PURPOSE:To compose data of two image data by a line memory and a frame memory and to reduce the memory capacity by writing image data corresponding to the same line and reading data out of the frame memory corresponding to the line. CONSTITUTION:First image data is written in the line memory 111 in synchronism with a 1st horizontal synchronizing signal H1 and 2nd image data is written in the frame memory 121 in synchronism with 2nd horizontal and vertical synchronizing signals H2 and V2. Further, the 1st image data is read out of the line memory 111 in synchronism with the 1st horizontal synchronizing signal H1 and the 2nd image data is read out of the frame memory 121 in synchronism with the 1st horizontal and vertical synchronizing signals H1 and V1 corresponding to the 1st image data. Therefore, the image data are both read out in synchronism with the 1st horizontal and vertical synchronizing signals H1 and V1 and the two synchronizing image data are obtained to compose the image by a composing means 131. Consequently, the memory capacity is reducible.</p> |
