US5532750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlaced-to-sequential scan conversion
Assignee: Koninklijke Philips NV
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Filing: 1995-04-03
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Granted: 1996-07-02
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Expires: 2015-04-03
Abstract
Abstract In a method of converting an interlaced video signal (IS) into an output sequentially scanned video signal (SSS), a first sequentially scanned video signal (SS1) is furnished in dependence upon the interlaced video signal (IS). Subsequently, a motion-compensated sequentially scanned signal (MCS) is furnished in dependence upon the first sequentially scanned video signal (SS1). All video lines of the output sequentially scanned video signal (SSS) are furnished in dependence upon both the first sequentially scanned video signal (SS1) and the motion-compensated sequentially scanned signal (MCS) to prevent inaccuracies in motion vectors used in the motion-compensated processing operation (5-9) from resulting in visible distortions.
Inventors
- 👤 Gerard De Haan
- 👤 Paul W. A. C. Biezen
- 👤 Olukayode A. Ojo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:43
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0117; H04N7/012
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A method of converting an interlaced video signal into an output sequentially scanned video signal, comprising the steps of: furnishing a first sequentially scanned video signal (SS1) in dependence upon said interlaced video signal (IS); furnishing a motion-compensated sequentially scanned signal (MCS) in dependence upon said first sequentially scanned video signal (SS1); and generating all video lines of said output sequentially scanned video signal (SSS) in dependence upon both said first sequentially scanned video signal (SS1) and said motion-compensated sequentially scanned signal (MCS).
Claim 2
Independent Claim
83 words
A method of converting an interlaced video signal into an output sequentially scanned video signal, comprising the steps of: furnishing a first sequentially scanned video signal (SS1) in dependence upon said interlaced video signal (IS); furnishing a motion-compensated sequentially scanned signal (MCS) in dependence upon said first sequentially scanned video signal (SS1); and generating all video lines of said output sequentially scanned video signal (SSS) in dependence upon both said first sequentially scanned video signal (SS1) and said motion-compensated sequentially scanned signal (MCS).
Claim 3
Independent Claim
88 words
An apparatus for converting an interlaced video signal (IS) into an output sequentially scanned video signal (SSS), comprising: means coupled to receive said interlaced video signal (IS) for furnishing a first sequentially scanned video signal (SS1); means for furnishing a motion-compensated sequentially scanned signal (MCS) in dependence upon said first sequentially scanned video signal (SS1); and means for generating all video lines of said output sequentially scanned video signal (SSS) in dependence upon both said first sequentially scanned video signal (SS1) and said motion-compensated sequentially scanned signal (MCS).
Claim 4
Independent Claim
88 words
An apparatus for converting an interlaced video signal (IS) into an output sequentially scanned video signal (SSS), comprising: means coupled to receive said interlaced video signal (IS) for furnishing a first sequentially scanned video signal (SS1); means for furnishing a motion-compensated sequentially scanned signal (MCS) in dependence upon said first sequentially scanned video signal (SS1); and means for generating all video lines of said output sequentially scanned video signal (SSS) in dependence upon both said first sequentially scanned video signal (SS1) and said motion-compensated sequentially scanned signal (MCS).
Claim 5
Dependent Claim
38 words
An apparatus as claimed in claim 2, wherein said generating means comprises means for combining said first sequentially scanned video signal (SS1) and said motion-compensated sequentially scanned signal (MCS) to furnish said output sequentially scanned video signal (SSS).
Claim 6
Dependent Claim
66 words
An apparatus as claimed in claim 3, wherein said combining means comprise a first mixer for first lines positionally corresponding to original lines of a present field of the interlaced video signal, a second mixer for second lines positionally corresponding to interpolated lines between said original lines, and a multiplexer for line-alternately selecting an output of the first mixer or an output of the second mixer.
Claim 7
Dependent Claim
50 words
An apparatus as claimed in claim 4, wherein at least a second mixing factor (ki) of said second mixer depends on a vertical motion vector component, whereby a mixing factor (ki) used with odd vertical motion vector components exceeds a mixing factor (ki) used with even vertical motion vector components.
Claim 8
Dependent Claim
22 words
An apparatus as claimed in claim 2, wherein said motion-compensated means are coupled to receive said output sequentially scanned video signal (SSS).
Claim 9
Dependent Claim
14 words
An apparatus a claimed in claim 2, wherein said motion-compensated means are motion-vector-compensated means.
Claim 10
Dependent Claim
62 words
An apparatus as claimed in claim 2, wherein said motion-compensated means includes means for estimating motion vectors, and wherein said generating means includes means for providing a weighted averaging of first sequentially scanned video signals (SSI) and said motion-compensated sequentially scanned signal (MCS) to generate said output sequentially scanned video signal (SSS), with weights depending on a reliability of said motion vectors.
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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) | 1999-07-02 | 2000-01-01 | 2000-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-02 | 2004-01-01 | 2004-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-02 | 2008-01-01 | 2008-07-02 | $7700.00 | Window Closed / Lapsed |