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US4930012A
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Circuit for detecting motion in a video signal on the basis of detected correlation patterns
Assignee: Sony Corp
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Filing: 1989-09-21
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Granted: 1990-05-29
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Expires: 2009-09-21
Abstract
Abstract A circuit for detecting motion of a color video signal includes serially-connected first and second frame memories for storing the video signal frame-by-frame. First and second difference video signals are produced which respectively correspond to the difference between the input and output signals of the first frame memory and the difference between the input and output signals of the second frame memory, whereupon first and second absolute values are generated in response to the first and second difference video signals, respectively. Such first and second absolute values are employed for detecting first and second correlation patterns of the first and second difference video signals, respectively, and then motion of the video signal is discriminated on the basis of the detected correlation patterns.
Inventors
- 👤 Tadao Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:39
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/77; H04N9/78; H04N5/00; H04N5/14; H04N5/144
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
A motion detecting circuit for detecting motion of a video signal, comprising: serially-connected first and second frame memories for storing the video signal frame-by-frame; means for producing first and second difference video signals respectively corresponding to the difference between input and output signals of said first frame memory and the difference between input and output signals of said second frame memory; means for generating first and second absolute values in response to said first and second difference video signals, respectively; means receiving said first and second absolute values and being responsive thereto for detecting first and second correlation patterns of said first and second difference video signals; and means receiving the detected correlation patterns for discriminating motion of the video signal on the basis thereof.
Claim 2
Dependent Claim
125 words
A motion detecting circuit for detecting motion of a video signal, comprising: serially-connected first and second frame memories for storing the video signal frame-by-frame; means for producing first and second difference video signals respectively corresponding to the difference between input and output signals of said first frame memory and the difference between input and output signals of said second frame memory; means for generating first and second absolute values in response to said first and second difference video signals, respectively; means receiving said first and second absolute values and being responsive thereto for detecting first and second correlation patterns of said first and second difference video signals; and means receiving the detected correlation patterns for discriminating motion of the video signal on the basis thereof.
Claim 3
Dependent Claim
31 words
A motion detecting circuit according to claim 1; further comprising means for detecting a motion of said video signal by detecting a difference between said first and second difference video signals.
Claim 4
Dependent Claim
25 words
A motion detecting circuit according to claim 2; in which each of said first and second difference video signals includes chrominance and luminance difference signals.
Claim 5
Dependent Claim
50 words
A motion detecting circuit according to claim 3; in which said means for generating first and second absolute values includes, for each of said first and second absolute values, an absolute value circuit for the respective difference luminance signal and an absolute value circuit for the respective difference chrominance signal.
Claim 6
Dependent Claim
42 words
A motion detecting circuit according to claim 4; in which said means for detecting first and second correlation patterns includes means for detecting a correlation between the difference luminance and difference chrominance signals of said first and second difference video signals, respectively.
Claim 7
Dependent Claim
26 words
A motion detecting circuit according to claim 5; in which said means for detecting said first and second correlation patterns include a read only memory (ROM).
Claim 8
Dependent Claim
48 words
A motion detecting circuit according to claim 6; in which said absolute values of said luminance and chrominance signals of said first and second difference video signals are used as address signals for said read only memory of said means for detecting said first and second correlation patterns.
References Cited (Backward Citations)
US4811092A
Cited
US4794454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |