US6563511B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-flickering for video display based on pixel luminance
Assignee: Qualcomm Inc
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Filing: 1999-03-05
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Granted: 2003-05-13
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Expires: 2019-03-05
Abstract
Abstract The present invention is a method and apparatus to generate an anti-flickered pixel from a source pixel having a source pixel value in a display memory. The apparatus comprises a plurality of storage elements, a filter, a comparator, and an output selector. The plurality of storage elements store a sequence of pixels in the display memory which includes the source pixel. The filter is coupled to the plurality of storage elements to filter the sequence of pixels. The filter generates a filtered pixel corresponding to the source pixel. The comparator is coupled to the plurality of storage elements to compare the source pixel value with a threshold value. The comparator generates a comparison result. The output selector is coupled to the filter and the storage elements to select one of the source and filtered pixels according to the comparison result. The selected one of the source and filtered pixels is the anti-flickered pixel.
Inventors
- 👤 Gerard K. Yeh
- 👤 Anoush Khazeni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:00
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0117; H04N7/0122; G; G09; G09G; G09G5/00; G09G5/36; H04N5/00; H04N5/14; H04N5/21; H04N5/44; H04N5/46; G09G2320/00; G09G2320/02; G09G2320/0247; H04N21/00; H04N21/40; H04N21/41; H04N21/426; H04N7/0127; H04N7/0132; H04N9/00; H04N9/64; H04N9/641
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
165 words
An apparatus to generate an anti-flickered pixel from a source pixel having a source pixel value in a display memory, the apparatus comprising: a plurality of storage elements to store a sequence of pixels in the display memory, the sequence of pixels including the source pixel; a filter coupled to the plurality of storage elements to filter the sequence of pixels, the filter generating a filtered pixel corresponding to the source pixel; a comparator coupled to the plurality of storage elements to compare the source pixel value with a threshold value, the comparator generating a comparison result; an output selector coupled to the filter and the storage elements to select one of the source and filtered pixels according to the comparison result, the selected one of the source and filtered pixels being the anti-flickered pixel; and a source selector coupled to the plurality of storage elements to select the source pixel by comparing a pair of pixels in the middle of the sequence of pixels.
Claim 2
Independent Claim
165 words
An apparatus to generate an anti-flickered pixel from a source pixel having a source pixel value in a display memory, the apparatus comprising: a plurality of storage elements to store a sequence of pixels in the display memory, the sequence of pixels including the source pixel; a filter coupled to the plurality of storage elements to filter the sequence of pixels, the filter generating a filtered pixel corresponding to the source pixel; a comparator coupled to the plurality of storage elements to compare the source pixel value with a threshold value, the comparator generating a comparison result; an output selector coupled to the filter and the storage elements to select one of the source and filtered pixels according to the comparison result, the selected one of the source and filtered pixels being the anti-flickered pixel; and a source selector coupled to the plurality of storage elements to select the source pixel by comparing a pair of pixels in the middle of the sequence of pixels.
Claim 3
Dependent Claim
11 words
The apparatus of claim 1 wherein the threshold value is programmable.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein the sequence of pixels corresponds to a vertical sequence of pixels of the display data.
Claim 5
Dependent Claim
12 words
The apparatus of claim 3 wherein the display memory stores luminance pixels.
Claim 6
Dependent Claim
27 words
The apparatus of claim 1 wherein the output selector selects the filtered pixel if the comparison result indicates that the source pixel value exceeds the threshold value.
Claim 7
Dependent Claim
32 words
The apparatus of claim 1 wherein the output selector selects the source pixel if the comparison result indicates that the source pixel value is equal to or less than the threshold value.
Claim 8
Dependent Claim
17 words
The apparatus of claim 1 wherein the filter is a non-recursive filter having a variable filter length.
Claim 9
Dependent Claim
15 words
The apparatus of claim 7 wherein the variable filter length ranges from one to six.
Claim 10
Independent Claim
118 words
A method to generate an anti-flickered pixel from a source pixel having a source pixel value in a display memory, the method comprising: filtering a sequence of pixels stored in a plurality of storage elements, the sequence of pixels including the source pixel, the filter generating a filtered pixel corresponding to the source pixel; comparing the source pixel value with a threshold value to generate a comparison result; and selecting one of the source and filtered pixels according to the comparison result, the selected one of the source and filtered pixels being the anti-flickered pixel; and selecting the source pixel by a source selector by comparing a pair of pixels in the middle of the sequence of pixels.
Claim 11
Independent Claim
118 words
A method to generate an anti-flickered pixel from a source pixel having a source pixel value in a display memory, the method comprising: filtering a sequence of pixels stored in a plurality of storage elements, the sequence of pixels including the source pixel, the filter generating a filtered pixel corresponding to the source pixel; comparing the source pixel value with a threshold value to generate a comparison result; and selecting one of the source and filtered pixels according to the comparison result, the selected one of the source and filtered pixels being the anti-flickered pixel; and selecting the source pixel by a source selector by comparing a pair of pixels in the middle of the sequence of pixels.
Claim 12
Dependent Claim
12 words
The method of claim 9 , wherein the threshold value is programmable.
Claim 13
Dependent Claim
21 words
The method of claim 9 wherein the sequence of pixels corresponds to a vertical sequence of pixels of the display data.
Claim 14
Dependent Claim
12 words
The method of claim 11 wherein the display memory stores luminance pixels.
Claim 15
Dependent Claim
27 words
The method of claim 9 wherein the output selector selects the filtered pixel if the comparison result indicates that the source pixel value exceeds the threshold value.
Claim 16
Dependent Claim
32 words
The method of claim 9 wherein the output selector selects the source pixel if the comparison result indicates that the source pixel value is equal to or less than the threshold value.
Claim 17
Dependent Claim
17 words
The method of claim 9 wherein the filter is a non-recursive filter having a variable filter length.
Claim 18
Dependent Claim
15 words
The method of claim 15 wherein the variable filter length ranges from one to six.
Claim 19
Independent Claim
179 words
A system comprising: a display memory storing a source pixel having a source pixel value; and a graphics processor coupled to the display memory to generate an anti-flickered pixel from the source pixel, the graphics processor comprising: a plurality of storage elements to store a sequence of pixels in the display memory, the sequence of pixels including the source pixel; a filter coupled to the plurality of storage elements to filter the sequence of pixels, the filter generating a filtered pixel corresponding to the source pixel; a comparator coupled to the plurality of storage elements to compare the source pixel value with a threshold value, the comparator generating a comparison result; an output selector coupled to the filter and the storage elements to select one of the source and filtered pixels according to the comparison result, the selected one of the source and filtered pixels being the anti-flickered pixel; and a source selector coupled to the plurality of storage elements to select the source pixel by comparing a pair of pixels in the middle of the sequence of pixels.
Claim 20
Independent Claim
179 words
A system comprising: a display memory storing a source pixel having a source pixel value; and a graphics processor coupled to the display memory to generate an anti-flickered pixel from the source pixel, the graphics processor comprising: a plurality of storage elements to store a sequence of pixels in the display memory, the sequence of pixels including the source pixel; a filter coupled to the plurality of storage elements to filter the sequence of pixels, the filter generating a filtered pixel corresponding to the source pixel; a comparator coupled to the plurality of storage elements to compare the source pixel value with a threshold value, the comparator generating a comparison result; an output selector coupled to the filter and the storage elements to select one of the source and filtered pixels according to the comparison result, the selected one of the source and filtered pixels being the anti-flickered pixel; and a source selector coupled to the plurality of storage elements to select the source pixel by comparing a pair of pixels in the middle of the sequence of pixels.
Claim 21
Dependent Claim
11 words
The system of claim 17 wherein the threshold value is programmable.
Claim 22
Dependent Claim
21 words
The system of claim 17 wherein the sequence of pixels corresponds to a vertical sequence of pixels of the display data.
Claim 23
Dependent Claim
12 words
The system of claim 19 wherein the display memory stores luminance pixels.
Claim 24
Dependent Claim
27 words
The system of claim 17 wherein the output selector selects the filtered pixel if the comparison result indicates that the source pixel value exceeds the threshold value.
Claim 25
Dependent Claim
32 words
The system of claim 17 wherein the output selector selects the source pixel if the comparison result indicates that the source pixel value is equal to or less than the threshold value.
Claim 26
Dependent Claim
17 words
The system of claim 17 wherein the filter is a non-recursive filter having a variable filter length.
Claim 27
Dependent Claim
15 words
The system of claim 23 wherein the variable filter length ranges from one to six.
References Cited (Backward Citations)
US5910820A
Cited
US6297847B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-05-12 | 2006-11-11 | 2007-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-05-12 | 2010-11-11 | 2011-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-05-12 | 2014-11-11 | 2015-05-13 | $7700.00 | Window Closed / Lapsed |