US5592231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion adaptive scan-rate conversion using directional edge interpolation
Assignee: Texas Instruments Inc
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Filing: 1995-06-07
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Granted: 1997-01-07
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Expires: 2015-06-07
Abstract
Abstract A method for processing video data to produce a progressively scanned signal from an input of conventional interlaced video. The data is received at a processor (1), used to determine a motion signal (26) over time between field of the data. The motion signal is filtered to reduce errors caused by noise-corrupted video sources and then further filtered to spread out the determined motion signal. Edge information (30) is located and combined with the motion signal to produce an integrated progressive-scan signal (36) for display on a video display device, producing images with sharper edges and motion signals which have a lower susceptibility to noise.
Inventors
- 👤 Todd Clatanoff
- 👤 Vishal Markandey
- 👤 Robert J. Gove
- 👤 Kazuhiro Ohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:26
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0117; H04N7/012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A method for interpolating progressively scanned video data from interlaced video data fields comprising the steps of: receiving said interlaced video data fields at a processor; applying a fast median filtering method to said video data fields, comprising the steps of: a. performing a series of extreme comparisons between pairs of data values, for a set of data samples: b. updating a current most extreme value of said set of data as each one of said series of comparisons is performed; c. comparing each data value of said set with the current extreme value, then storing the one closest to the opposite extreme from said current extreme value; d. repeating said updating and said comparing steps until three said extreme values remain; and e. finding a final most extreme value of said remaining values, wherein said final most extreme value is a median value; further filtering said video field data using said median value both spatially and temporally, thereby producing an interpolated output; and sending said interpolated output to a display device for display as progressively scanned video data.
Claim 2
Independent Claim
179 words
A method for interpolating progressively scanned video data from interlaced video data fields comprising the steps of: receiving said interlaced video data fields at a processor; applying a fast median filtering method to said video data fields, comprising the steps of: a. performing a series of extreme comparisons between pairs of data values, for a set of data samples: b. updating a current most extreme value of said set of data as each one of said series of comparisons is performed; c. comparing each data value of said set with the current extreme value, then storing the one closest to the opposite extreme from said current extreme value; d. repeating said updating and said comparing steps until three said extreme values remain; and e. finding a final most extreme value of said remaining values, wherein said final most extreme value is a median value; further filtering said video field data using said median value both spatially and temporally, thereby producing an interpolated output; and sending said interpolated output to a display device for display as progressively scanned video data.
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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) | 2000-01-07 | 2000-07-08 | 2001-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-07 | 2004-07-08 | 2005-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-07 | 2008-07-08 | 2009-01-07 | $7700.00 | Window Closed / Lapsed |