System and method for DMA controlled image processing

Details System and method for DMA controlled image processing System and method for DMA controlled image processing

2011-04-12

2011-04-12

Nguyen, Hau H (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

C345S532000, C345S536000, C345S537000

Reexamination Certificate

active

07924296

ABSTRACT:
A system for processing image data from a plurality of images is disclosed. The invention involves alpha blending of two images of different resolution and color space utilizing shared logic for multiple image streams and without display storage frame buffer. The invention utilizes Direct Memory Access (DMA) fetching module for fetching image data from source images or from source image memory areas and transferring the data to another memory area without having to go through a central processing unit or display storage frame buffer. The DMAs are configured with direct registers or memory mapped descriptors as to the location of the source data. The DMA channels of the DMA module will fetch a portion of the source images (tiling) utilizing a link list or series of descriptors in a certain fetching order. The DMA modules can perform the alpha blending on the fetched image data.

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