| 摘要 |
PURPOSE:To prevent the deterioration f video quality accompanied with picture conversion, by performing the picture conversion such as movement and rotation of television picture with circuit technique. CONSTITUTION:The television picture signal P is smapled and inputted to the switch circuit 11 sequentially in time serial. In this case, to the switch circuit 11, the video element signals Pm,n, Pm-1,n, Pm-1,n-1, are given at the same time at the input timing of the video signal Pm,n. The switching circuit 11 selectively picks up one of the video element signals based on the output signal of the address selection circuit 15. On the other hand, the signal of coordinate (x,y) corresponding to each video element signal is respectively fed to the coordinate conversion circuit for operational processing according to the rotation angle information alpha predetermined to obtain the rotation coordinate (m,n). The interpolation processing of the video signal of rotation coordinate to the display coordinate (X,Y) is made, it is written in the high speed RAM, and further, it is sequentially transferred to the main memory 26 for write-in. |
