System and method for motion adaptive anti-aliasing
AssigneeTexas Instruments Incorporated
InventorJeffrey Matthew Kempf
Life of this patent
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Abstract
System and method for processing image data containing motion for display on a display device. A preferred embodiment comprises applying a filter to an input image, determining a presence of motion in the input image, and generating an output image from the input image and the filtered image based upon motion in the input image. The detection of motion in the input image permits the use of filtered image data in portions of the image containing motion, thereby taking advantage of aliasing reduction provided by the filter while allowing the use of unfiltered image data in portions not containing motion. This helps to preserve image quality since filtering softens the image.
Claims21
A method for generating images for display on a display device, the method comprising:
- applying a filter to an input image;
- determining a presence of motion in the input image;
- generating an output image by combining the input image and the filtered image proportional to an amount of the motion in the input image;
- and
- generating sub-images from the output image, wherein the sub-images have a lower resolution than the output image.
A motion adaptive anti-aliasing (MAA) circuit comprising:
- a filter coupled to a signal input, the filter configured to eliminate high frequency components in an input signal provided by the signal input;
- a motion detect unit coupled to the signal input, the motion detect unit configured to generate a motion value for the input signal;
- an output multiplexer coupled to the filter, the motion detect unit, and the signal input, the output multiplexer configured to proportionally combine an output of the filter and the input signal based upon the motion value to generate an output image;
- and
- a sub-frame generation unit coupled to the output multiplexer, the sub-frame generation unit configured to down-sample the output image into a plurality of sub-images, wherein each sub-image has a lower resolution than the output image.
A display system comprising:
- a motion adaptive anti-aliasing (MAA) circuit coupled to a signal input, the MAA circuit configured to produce an output image from an input image provided by the signal input, wherein portions of the output image containing motion are filtered and portions of the output image not containing motion are unfiltered, and configured to down-sample the output image into a plurality of sub-images, wherein each sub-image has a lower resolution than the output image;
- and
- a display device coupled to the MAA circuit, the display device configured to display each sub-image of the plurality of sub-images, wherein the plurality of sub-images are displayed within a single frame time.
Dependencies are inferred from the claim text.