Patent EP0434290A1 successfully refreshed from Google Patents.
EP0434290A1
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EP
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Motion detection apparatus as for an interlace to non-interlace scan converter
Assignee: RCA Licensing Corp
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Filing: 1990-12-12
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Granted: —
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Expires: 2010-12-12
Abstract
Abstract A detector for detecting motion in an image represented by a video signal includes delay means (40-52) for concurrently providing lines of signal from five consecutive fields (A-E). Sums (54) of signals (A3,B2) from first and second fields are subtracted (56) from sums (58) of signals (C3,D2) from third and fourth fields to generate first motion indicators (R2,R1). Differences (62) of signals (A3,B3) from the first and second fields are subtracted (64) from differences (66) of signals (C3,D3) from the third and fourth fields to generate second motion indicators (R4,R5). Differences (70) of signals (A3,E3) from the first and fifth fields are generated to form third motion indicators (R7,R6,R5). The first, second and third motion indicators are compared (76) and the largest is provided as a motion signal which is subsequently limited, spread and scaled. Signals used in forming the motion indicators are selected to substantially reject any adverse influence of the chrominance subcarrier.
Inventors
- 👤 Francis Selwyn Bernard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:26
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N7/00; H04N7/01; H04N7/0117; H04N7/012; H04N5/144; H04N7/0135
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
227 words
Image motion detection apparatus for detecting image motion in video signals formatted in fields of interlaced lines, said apparatus comprising: a source of video signal; provider means, coupled to said source, for concurrently providing a plurality of signals representing a plurality of lines from a plurality of said fields; characterized by: first means, coupled to said provider means, for generating at least one first motion indicator representing the magnitude of the difference between a first sum of signals representing lines from first mutually exclusive fields and a second sum of signals representing lines from second mutually exclusive fields; second means, coupled to said provider means, for generating at least one second motion indicator representing the magnitude of the difference between the magnitude of a first difference of signals representing lines from said first mutually exclusive fields and the magnitude of a second difference of signals representing lines from said second mutually exclusive fields; third means, coupled to said provider means, for generating at least one third motion indicator representing the magnitude of a third difference of signals representing lines from said first mutually exclusive fields and a further field exclusive of said first and second mutually exclusive fields; and a maximum detector, responsive to said first, second and third motion indicators, for providing the largest of said first, second and third motion indicators as a motion signal.
Claim 2
Dependent Claim
96 words
The image motion detection apparatus set forth in claim 1 characterized in that said first means includes delay means for delaying said first motion indicators by one line period to concurrently provide a set of at least two first motion indicators; in that said third means includes means for delaying said third motion indicators by one line period to concurrently provide a set of at least two third motion indicators; and in that said maximum detector is responsive to said set of first motion indicators, said second motion indicators and said set of third motion indicators.
Claim 3
Dependent Claim
69 words
The image motion detection apparatus set forth in claim 2 characterized in that said second means includes delay means for delaying said second motion indicators by one line period to concurrently provide a set of at least two second motion indicators; and in that said maximum detector is responsive to said set of first motion indicators, said set of second motion indicators and said set of third motion indicators.
Claim 4
Dependent Claim
72 words
The image motion detection apparatus set forth in claim 1 wherein said video signal includes a luminance component and a residual chrominance component, said residual chrominance component including a subcarrier component which is antiphase on successive lines, and characterized in that said first means includes means for summing signals representing lines including like phase subcarrier components,and said second and third means include means for differencing signals representing lines including antiphase subcarrier components.
Claim 5
Dependent Claim
99 words
The image motion detection apparatus set forth in claim 1 wherein said motion signal is represented by a first range of values, and further characterized by: means, responsive to said motion signal, for limiting said motion signal to a second range of values less than said first range wherein motion signals greater and lesser than predetermined max and min values are clamped to said max and min values respectively to generate a limited motion signal; and means responsive to said limited motion signal for offsetting said limited motion signal to generate a control signal having a predetermined minimum value.
Claim 6
Dependent Claim
25 words
The image motion detection apparatus set forth in claim 5 further characterized by means for expanding said control signal in horizontal, vertical and temporal directions.
Claim 7
Dependent Claim
161 words
The image motion detection apparatus set forth in claim 6 characterized in that said means for expanding said control signal includes: first tapped delay means, for providing a plurality of delayed signals each of which is delayed by successive periods of a submultiple of a chrominance subcarrier period; first maximum detection means, coupled to said first tapped delay means and responsive to said plurality of delayed signals, for passing the largest of said plurality of delayed signals; second tapped delay means, for providing a further plurality of signals delayed by zero; 262; 263; and 525 line periods; second maximum detection means, coupled to said second tapped delay means and responsive to said further plurality of delayed signals, for passing the largest of said further plurality of delayed signals; and means for serially coupling said first tapped delay means and said first maximum detection means with said second tapped delay means and said second maximum detection means, to process said control signal.
Claim 8
Dependent Claim
68 words
The image motion detection apparatus set forth in claim 7 further characterized by: means coupled to said means for expanding said control signal for scaling said control signal according to the function F given by F=K * R/(max-min) where K is the valued of the control signal, R is the desired range of the scaled control signal, and max and min are said predetermined max and min values.
Claim 9
Dependent Claim
102 words
The image motion detection apparatus set forth in claim 5 characterized in that said means, responsive to said motion signal, for limiting said motion signal to a second range of values comprises: a source of said max and min values; a minimum detector responsive to said max value and said control signal for passing the lesser valued one of said max value and said control signal; a further maximum detector, responsive to signal passed by said minimum detector and said min value, for passing the greater of signal passed by said minimum detector and said min value as said limited motion signal.
Claim 10
Dependent Claim
153 words
Image motion detection apparatus for detecting image motion in video signals formatted in fields of interlaced lines, said apparatus comprising: a source of video signal; provider means, coupled to said source, for concurrently providing a plurality of signals representing a plurality of lines from a plurality of said fields; characterized by: first means, coupled to said provider means, and responsive to signals representing lines from four successive fields for generating downward motion indicators; second means, coupled to said provider means and responsive to signals representing lines from four successive fields for generating upward motion indicators; third means, coupled to said provider means, and responsive to signals representing lines from a current field and a field separated therefrom by four field intervals, for generating forward motion indicators; and means, responsive to said upward, downward, and forward motion indicators, for passing the largest of said upward, downward, and forward motion indicators as a motion signal.
Claim 11
Dependent Claim
103 words
The image motion detection apparatus set forth in claim 10 characterized in that said first means comprises: first summing means for summing signals representing lines separated by 263 line intervals occurring in first and second fields to generate a first sum signal; second summing means for summing signals representing lines separated by 263 line intervals occurring in third and fourth fields exclusive of said first and second fields, to generate a second sum signal; and means, responsive to said first and second sum signals, for providing as said downward motion indicator, the magnitude of the difference of said first and second sum signals.
Claim 12
Dependent Claim
110 words
The image motion detection apparatus set forth in claim 11 characterized in that said second means comprises: first differencing means for generating the magnitude of the difference of signals representing lines separated by 262 line intervals occurring in said first and second fields to generate a first difference signal; second differencing means for generating the magnitude of the difference of signals representing lines separated by 262 line intervals occurring in said third and fourth fields to generate a second difference signal; and means, responsive to said first and second difference signals, for providing as said upward motion indicator, the magnitude of the difference of said first and second difference signals.
Claim 13
Dependent Claim
50 words
The image motion detection apparatus set forth in claim 12 characterized in that said third means comprises: third differencing means for generating the magnitude of the difference of signals representing lines separated by 1050 line intervals occurring in said first and a fifth fields to generate said forward motion indicator.
References Cited (Backward Citations)
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