De-ringing filter for decompressed video data

Details De-ringing filter for decompressed video data De-ringing filter for decompressed video data

2007-04-10

2011-12-06

Tucker, Wesley (Department: 2624)

Image analysis

Image enhancement or restoration

C382S166000, C382S211000, C382S232000, C382S233000

Reexamination Certificate

active

08073276

ABSTRACT:
A post processing apparatus of a graphics controller to filter decompressed video data. An embodiment of the apparatus includes a buffer and a de-ringing filter. The buffer is configured to read a pixel line of video data from memory. The pixel line includes pixels from adjacent macroblocks of the video data. The de-ringing filter is coupled to the buffer. The de-ringing filter is configured to identify a maximum pixel jump between adjacent pairs of pixels in the pixel line and to apply a de-ringing filter to a pixel within a pixel subset of the pixel line in response to a determination that the pixel is not an edge pixel. The determination that the pixel is not an edge pixel is based on the identified maximum pixel jump.

REFERENCES:
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patent: 2004/0081368 (2004-04-01), Mathew et al.
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patent: 2005/0244063 (2005-11-01), Kwon et al.
patent: 2006/0110062 (2006-05-01), Chiang et al.
patent: 2007/0140574 (2007-06-01), Yamaguchi et al.

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