| 摘要 |
PURPOSE:To execute optional superimposing and chromakie function by applying logic arithmetic operation between picture signals and selecting either the picture signal or the logic arithmetic output in response to the logic arithmetic output or a control signal. CONSTITUTION:In the case of making superimposition, NOP operation is selected for the arithmetic operation of a logic section 1, and a picture data 1 itself is outputted as an output of the logic section 1. On the other hand, a control section 3 selects information of a lookup table in response to the control signal. A selector 2 selects a picture data 1 or 2 based on a data of an output of the control section 3, that is, a data of the lookup table. Since an optional position of the picture data 1 is replaced into the picture data 2, superimposition is attained. |
