Weighted average circuit using digit shifting

Details Weighted average circuit using digit shifting Weighted average circuit using digit shifting

1994-03-15

1997-04-29

Jankus, Almis R.

395131, 395133, 395501, G06T 1500

Patent

active

056257643

ABSTRACT:
An image blend circuit comprising a first image memory and a second image memory output pixel data according to pixel location information containing a pixel clock signal generated by an image location information supply unit, and a counter counts. Blend ratios are read from the counter and a blend ratio buffer. A data selector selects between these blend ratios according to a control signal from an attribute buffer and applies a selected blend ratio to a pixel blend unit. The pixel blend unit, depending upon the received blend ratio, translucently synthesizes or selects pixels from the first and second image memories. In an information processor, when opening a plurality of windows on a display screen produces an overlap field between the windows, such overlapped images are translucently blended for translucent image display. Therefore, the blend ratio can be set with less write information.

REFERENCES:
patent: 5384912 (1995-01-01), Ogrinc et al.

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