Picture data processing apparatus

Details Picture data processing apparatus Picture data processing apparatus

1995-05-02

1997-01-07

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

345153, 345199, G09G 502

Patent

active

055921965

ABSTRACT:
An image data processing apparatus such as an image synthesizing apparatus that synthesizes an image produced by a computer in accordance with tables stored in pages. A picture data conversion circuit converts picture data of red, blue and green color signals or picture data of luminance and color difference signals to predetermined converted picture data. A page change circuit switches the page of the picture data conversion circuit on the basis of alpha data representing transparency of the color picture data. An image data processing apparatus generates virtual addresses based on predetermined reference addresses in an address space larger than the frame memory addresses for accessing a plurality of frame memories at a low-order bit of the virtual address by selecting and outputting the image data outputted from the plurality of frame memories on the basis of a high-order bit of the virtual address. A processing form of color signal or luminance signal and color difference signals are recorded to a mode register when storing the picture data in the picture memory. Output data of the picture memories are directly outputted, or are converted into color signals, corresponding to the contents of the mode register.

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