| 摘要 |
<p>PURPOSE:To speed up operation by reading out image data which are written previously when writing image data in two storage means used alternately for writing and displaying in order according to priority, and writing low- priority image data corresponding to data indicating transparency. CONSTITUTION:When image data are written, the image data which are written previously are read out through 1st terminals SO0-SO3 of means M1 and M2 equipped with 1st terminals SO0-SO3 for output and 2nd terminal D0-D3 for input and when read image data is image data indicating transparency, image data having low priority are written through the terminals D0-D3 of the storage means M1 and M2. Consequently, the image data are read out and written in parallel through the terminals SO0-SO3 and D0-D3 of the storage means M1 and M2, and image data having priority of display are encoded into a television signal of an image at a high speed according to the priority.</p> |
