Patent EP0483837A2 successfully refreshed from Google Patents.
EP0483837A2
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Integrated circuit for processing digital signals in a video camera having electronic zooming function
Assignee: Sanyo Electric Co Ltd
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Filing: 1991-10-30
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Granted: —
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Expires: 2011-10-30
Abstract
Abstract An output from a solid state image sensing device spatially modulated by a color filter is A/D converted and stored in a field memory. Digital signals read from the field memory during electronic zooming are successively delayed by 1 H period by means of first, second and third 1H delay elements connected in series. The output from the field memory and outputs from the first, second and third 1H delay elements are separated into luminance components and line sequential color components by first to fourth Y/C separating circuits, respectively. A first set of three primary color signals are calculated based on outputs from the first, second and third Y/C separating circuits, and a second set of three primary color signals are calculated based on outputs from the second, third and fourth Y/C separating circuits. Three primary color signals corresponding to a new display point formed along with the execution of electronic zooming function are formed based on the calculated two sets of three primary color signals, and a luminance signal corresponding to the new display point is formed based on outputs from the first and second delay elements.
Inventors
- 👤 Kiyotada Kawakami
- 👤 Masao Takuma
- 👤 Tooru Asaeda
- 👤 Tooru Yamamoto
- 👤 Haruhiko Murata
- 👤 Hirotsugu Murashima
- 👤 Tohru Watanabe
- 👤 Masashi Honzawa
- 👤 Keiichi Tanii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 10:24
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/74; H04N5/00; H04N5/222; H04N5/262; H04N5/2628; H04N2209/00; H04N2209/04; H04N2209/041; H04N2209/042; H04N2209/045; H04N2209/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
261 words
An integrated circuit (30) for processing digital signals for a video camera capable of effecting electronic zooming function in which an output from a solid stage image sensing device (1) spatially modulated by a color filter (2) is A/D converted to be temporarily stored in a field memory (FM), and the stored digital signal is read for zooming, comprising first, second and third 1 H delay elements (D1, D2, D3) for successively delaying a digital signal read from said field memory by 1 horizontal period; first, second, third and fourth Y/C separating means (E1, E2, E3, E4) for separating said digital signal and outputs from said first, second and third 1H delay elements, respectively, to luminance components and line sequential two types of color components; first RGB synthesizing means (G1) for forming a first set of three primary color signals based on outputs from said first, second and third Y/C separating means; second RGB synthesizing means (G2) for forming a second set of three primary color signals based on outputs from said second, third and fourth Y/C separating means; luminance signal interpolating means (H2, J2) for synthesizing luminance signals corresponding to new display points which are to be formed in carrying out electronic zooming function, based on outputs from said first and second delay elements; and color signal interpolating means (H3, H4, H5, J3, J4, J5) for synthesizing three primary color signals corresponding to the new display points which are to be formed in carrying out electronic zooming function, based on said first and second sets of three primary color signals.
Claim 2
Dependent Claim
261 words
An integrated circuit (30) for processing digital signals for a video camera capable of effecting electronic zooming function in which an output from a solid stage image sensing device (1) spatially modulated by a color filter (2) is A/D converted to be temporarily stored in a field memory (FM), and the stored digital signal is read for zooming, comprising first, second and third 1 H delay elements (D1, D2, D3) for successively delaying a digital signal read from said field memory by 1 horizontal period; first, second, third and fourth Y/C separating means (E1, E2, E3, E4) for separating said digital signal and outputs from said first, second and third 1H delay elements, respectively, to luminance components and line sequential two types of color components; first RGB synthesizing means (G1) for forming a first set of three primary color signals based on outputs from said first, second and third Y/C separating means; second RGB synthesizing means (G2) for forming a second set of three primary color signals based on outputs from said second, third and fourth Y/C separating means; luminance signal interpolating means (H2, J2) for synthesizing luminance signals corresponding to new display points which are to be formed in carrying out electronic zooming function, based on outputs from said first and second delay elements; and color signal interpolating means (H3, H4, H5, J3, J4, J5) for synthesizing three primary color signals corresponding to the new display points which are to be formed in carrying out electronic zooming function, based on said first and second sets of three primary color signals.
Claim 3
Dependent Claim
48 words
The integrated circuit for processing digital signals according to claim 1, further comprising zero level adjusting means (5) for adjusting a reference level of said digital signal so that a level of an optical black portion of the digital signal read from said field memory takes zero level.
Claim 4
Dependent Claim
64 words
The integrated circuit for processing digital signals according to claim 1, further comprising means (7c) for generating a contour enhancement signal in a vertical direction based on luminance component outputs from said first, second, third and fourth Y/C separating means; and means (11 b) for generating a contour enhancement signal in a horizontal direction based on an output from said luminance signal interpolating means.
Claim 5
Dependent Claim
42 words
The integrated circuit for processing digital signals according to claim 3, further comprising means (11) for providing contour enhancement to a luminance signal output from said luminance signal interpolating circuit, based on said contour enhancement signals in the vertical and horizontal directions.
Claim 6
Dependent Claim
120 words
The integrated circuit for processing digital signals according to claim 4, wherein each of said first and second RGB synthesizing means includes means (7a) for simultaneously processing line sequential two types of color components by calculating an arithmetic mean of color component outputs of the same type out of color component outputs from the corresponding Y/C separating means, by using an arithmetic mean coefficient determined based on the luminance component outputs from the corresponding Y/C separating means, and RGB synthesizing processing means (7b) for effecting a prescribed arithmetic operation on the luminance component output of the corresponding Y/C separating means and on an output from said simultaneous processing means, for providing in parallel a set of three primary color signals.
Claim 7
Dependent Claim
119 words
The integrated circuit for processing digital signals according to claim 5, wherein said luminance signal interpolating means includes vertical interpolating means (H2) for effecting interpolation in vertical direction on outputs from said first and second delay elements, and horizontal interpolating means (J2) for effecting interpolation in horizontal direction on an output from said vertical interpolating means; and said color signal interpolating means includes a set of vertical interpolating means (H3, H4, H5) for effecting interpolation in vertical direction on every color signal based on said first and second sets of primary color signals, and a set of horizontal interpolating means (J3, J4, J5) for effecting interpolation in horizontal direction on outputs from said one set of vertical interpolating means.
Claim 8
Dependent Claim
68 words
The integrated circuit for processing digital signals according to claim 6, wherein each of said vertical and horizontal interpolating means includes means for calculating a luminance signal or a color signal corresponding to a new display point provided by equally dividing a space between adjacent points of a picked up image, by proportionally distributing said digital luminance or color signal corresponding to a point of picked up image.
Claim 9
Dependent Claim
44 words
The integrated circuit for processing digital signals according to claim 6, further comprising edge chroma suppressing means (10) responsive to said vertical and horizontal contour enhancement signals for suppressing levels of three primary color signals supplied from said one set of horizontal interpolating means.
Claim 10
Dependent Claim
29 words
The integrated circuit for processing digital signals according to claim 1, wherein each of said first, second and third 1H delay elements is formed of a random access memory.
Claim 11
Dependent Claim
293 words
An integrated circuit (30) for processing digital signals for a video camera capable of effecting electronic zooming function in which an output from a solid state image sensing device (1) spatially modulated by a color filter (2) is A/D converted to be temporarily stored in a field memory (FM), and the stored digital signal is read for zooming, comprising: first, second and third 1H delay elements (D1, D2, D3) for successively delaying a digital signal read from said field memory by 1 horizontal period, first, second, third and fourth Y/C separating means (E1, E2, E3, E4) for separating said digital signal and outputs from said first, second and third 1 H delay elements, respectively, to luminance components and line sequential two types of color components; first RGB synthesizing means (G1) for forming a first set of three primary color signals based on outputs from said first, second and third Y/C separating means; second RGB synthesizing means (G2) for forming a second set of three primary color signals based on outputs from said second, third and fourth Y/C separating means; luminance signal interpolating means (H2, J2) for synthesizing luminance signals corresponding to new display points which are to be formed in carrying out electronic zooming function, based on outputs from said first and second delay elements; color signal interpolating means (H3, H4, H5, J3, J4, J5) for synthesizing three primary color signals corresponding to the new display points which are to be formed in carrying out electronic zooming function, based on said first and second sets of three primary color signals; and means (12) for converting the three primary color signals supplied from said color signal interpolating means into one string of color signals by time divisionally multiplexing these signals with each band compressed.
Claim 12
Dependent Claim
293 words
An integrated circuit (30) for processing digital signals for a video camera capable of effecting electronic zooming function in which an output from a solid state image sensing device (1) spatially modulated by a color filter (2) is A/D converted to be temporarily stored in a field memory (FM), and the stored digital signal is read for zooming, comprising: first, second and third 1H delay elements (D1, D2, D3) for successively delaying a digital signal read from said field memory by 1 horizontal period, first, second, third and fourth Y/C separating means (E1, E2, E3, E4) for separating said digital signal and outputs from said first, second and third 1 H delay elements, respectively, to luminance components and line sequential two types of color components; first RGB synthesizing means (G1) for forming a first set of three primary color signals based on outputs from said first, second and third Y/C separating means; second RGB synthesizing means (G2) for forming a second set of three primary color signals based on outputs from said second, third and fourth Y/C separating means; luminance signal interpolating means (H2, J2) for synthesizing luminance signals corresponding to new display points which are to be formed in carrying out electronic zooming function, based on outputs from said first and second delay elements; color signal interpolating means (H3, H4, H5, J3, J4, J5) for synthesizing three primary color signals corresponding to the new display points which are to be formed in carrying out electronic zooming function, based on said first and second sets of three primary color signals; and means (12) for converting the three primary color signals supplied from said color signal interpolating means into one string of color signals by time divisionally multiplexing these signals with each band compressed.
References Cited (Backward Citations)
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