Patent US5821918A successfully refreshed from Google Patents.
US5821918A
Expired / Lapsed
US
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Video processing apparatus, systems and methods
Assignee: S3 Graphics Co Ltd
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Filing: 1995-03-13
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Granted: 1998-10-13
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Expires: 2015-03-13
Abstract
Abstract A display interface device 20 is provided which includes inputs for receiving video data words, the video data words including control codes for controlling the output format of a display, and a video clock signal received from an associated video controller. A first-in/first-out memory 30 is also provided with a video data word clocked into memory 30 by the first clock and clocked out of memory 30 by a second clock generated from a clock received from an associated graphics controller.
Inventors
- 👤 Christopher Lloyd Reinert
- 👤 Sudhir Sharma
- 👤 Robert Marshall Nally
- 👤 John Charles Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:33
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/641; G; G09; G09G; G09G5/00; G09G5/003; G09G5/006; G09G5/008; G09G5/02; G09G5/06; G09G5/08; G09G5/36; G09G5/363; G09G5/39; G09G5/391; G09G5/395; G09G5/40; G09G2310/00; G09G2310/02; G09G2310/0232; G09G2320/00; G09G2320/06; G09G2320/0606; G09G2320/0673; G09G2340/00; G09G2340/04; G09G2340/0407; G09G2340/12; G09G2340/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A device for interfacing a video data source with a display, said display operable to display images as fields of pixels, comprising: input circuitry operable to receive video data words defining a plurality of selected pixels in a said field, said selected pixels disposed along an axis of said field and spaced apart by other pixels of said field; and a scaler for selectively providing by linear interpolation additional data words defining said other pixels in response to said video data words; wherein said scaler is operable to perform said linear interpolation in accordance with the formula: ##EQU1## where z 0 is the data being currently interpolated; z -1 , z -3 and z -5 are data from odd data points prior in time; and z +1 , z +3 and z +5 are data from odd data points subsequent in time.
Claim 2
Independent Claim
142 words
A device for interfacing a video data source with a display, said display operable to display images as fields of pixels, comprising: input circuitry operable to receive video data words defining a plurality of selected pixels in a said field, said selected pixels disposed along an axis of said field and spaced apart by other pixels of said field; and a scaler for selectively providing by linear interpolation additional data words defining said other pixels in response to said video data words; wherein said scaler is operable to perform said linear interpolation in accordance with the formula: ##EQU1## where z 0 is the data being currently interpolated; z -1 , z -3 and z -5 are data from odd data points prior in time; and z +1 , z +3 and z +5 are data from odd data points subsequent in time.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-12 | 2002-04-13 | 2002-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-12 | 2006-04-13 | 2006-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-12 | 2010-04-13 | 2010-10-13 | $7700.00 | Window Closed / Lapsed |