US5325182A
Expired / Lapsed
US
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Video signal processing circuit incorporated in a integrated circuit
Assignee: Sanyo Electric Co Ltd
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Filing: 1992-06-22
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Granted: 1994-06-28
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Expires: 2012-06-22
Abstract
Abstract A video signal processing circuit is incorporated in an IC for camcorder in which a camera signal outputted from a CCD image sensor is processed in a digital manner such that luminance and color signals can be outputted. In the IC, a vertical interpolation circuit produces two kinds of vertically interpolated data on the basis of a digital camera signal of one channel within an image area being set by an electronic zoom function. A YC separation circuit receives the two kinds of vertically interpolated data, and an output of the YC separation circuit is applied a horizontal interpolation circuit or an RGB composition circuit. If the YC separation output is applied to the horizontal interpolation circuit, the same outputs two kinds of horizontally interpolated data upon which three primary color signals are composed by the RGB composition circuit. If the YC separation output is applied to the RGB composition circuit, the horizontal interpolation circuit produces two kinds of horizontally interpolated data on the basis of three primary color data outputted by the RGB composition circuit.
Inventors
- 👤 Haruhiko Murata
- 👤 Yukio Mori
- 👤 Akihiro Maenaka
- 👤 Masao Takuma
- 👤 Kiyotada Kawakami
- 👤 Tooru Yamamoto
- 👤 Tooru Asaeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:03
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
A video signal processing circuit incorporated in an integrated circuit for receiving a digital camera signal obtained through an A/D conversion of an analog camera signal which is outputted by an image sensor, and for performing a digital signal processing so as to produce a luminance signal and a color signal, said video signal processing circuit, comprising: vertical interpolation means for performing a vertical interpolation of the digital camera signal of one channel within an image area which is set by an electronic zoom function and for producing two kinds of vertically interpolated data having color information different from each other; YC separation means, operably coupled to said vertical interpolation means, for receiving said vertically interpolated data and producing two kinds of differential color data; horizontal interpolation means, operably coupled to said YC separation means, for receiving said differential color data and producing two kinds of horizontally interpolated data correspondingly to said two kinds of vertically interpolated data; and color signal composition means, operably coupled to said horizontal interpolation means, for converting said horizontally interpolated data into three primary color signals.
Claim 2
Dependent Claim
181 words
A video signal processing circuit incorporated in an integrated circuit for receiving a digital camera signal obtained through an A/D conversion of an analog camera signal which is outputted by an image sensor, and for performing a digital signal processing so as to produce a luminance signal and a color signal, said video signal processing circuit, comprising: vertical interpolation means for performing a vertical interpolation of the digital camera signal of one channel within an image area which is set by an electronic zoom function and for producing two kinds of vertically interpolated data having color information different from each other; YC separation means, operably coupled to said vertical interpolation means, for receiving said vertically interpolated data and producing two kinds of differential color data; horizontal interpolation means, operably coupled to said YC separation means, for receiving said differential color data and producing two kinds of horizontally interpolated data correspondingly to said two kinds of vertically interpolated data; and color signal composition means, operably coupled to said horizontal interpolation means, for converting said horizontally interpolated data into three primary color signals.
Claim 3
Dependent Claim
187 words
A video signal processing circuit incorporated in an integrated circuit for receiving a digital camera signal obtained through an A/D conversion of an analog camera signal which is outputted by an image sensor, and for performing a digital signal processing so as to produce a luminance signal and a color signal, said video signal processing circuit, comprising: vertical interpolation means for performing a vertical interpolation of the digital camera signal of one channel within an image area which is set by an electronic zoom function so as to form and output two kinds of vertically interpolated data having color information different from each other; two-channel Y/C separation means, operably coupled to said vertical interpolation means, for receiving said vertically interpolated data and producing two kinds of differential color data; color signal composition means, operably coupled to said Y/C separation means, for converting said differential color data into three primary color data; and horizontal interpolation means, operably coupled to said color signal composition means, for receiving said three primary color data and producing two kinds of horizontally interpolated data correspondingly to said two kinds of vertically interpolated data.
Claim 4
Dependent Claim
187 words
A video signal processing circuit incorporated in an integrated circuit for receiving a digital camera signal obtained through an A/D conversion of an analog camera signal which is outputted by an image sensor, and for performing a digital signal processing so as to produce a luminance signal and a color signal, said video signal processing circuit, comprising: vertical interpolation means for performing a vertical interpolation of the digital camera signal of one channel within an image area which is set by an electronic zoom function so as to form and output two kinds of vertically interpolated data having color information different from each other; two-channel Y/C separation means, operably coupled to said vertical interpolation means, for receiving said vertically interpolated data and producing two kinds of differential color data; color signal composition means, operably coupled to said Y/C separation means, for converting said differential color data into three primary color data; and horizontal interpolation means, operably coupled to said color signal composition means, for receiving said three primary color data and producing two kinds of horizontally interpolated data correspondingly to said two kinds of vertically interpolated data.
Claim 5
Dependent Claim
149 words
A video signal processing circuit incorporated in an integrated circuit for receiving a digital camera signal obtained through an A/D conversion of an analog camera signal which is outputted by an image sensor, and for performing a digital signal processing so as to produce a luminance signal and a color signal, said video signal processing circuit, comprising: gamma correction means for gamma-correcting luminance data after Y/C separation; and knee correction means, operably coupled to said gamma correction means, provided at a succeeding stage of said gamma correction means, wherein said knee correction means has an input/output characteristic which is: (a) a first linear line with a first incline within a first range where an input level is low, and (b) a second linear line with a second incline smaller than said first incline within a second range where the input level is larger than that of said first range.
Claim 6
Dependent Claim
149 words
A video signal processing circuit incorporated in an integrated circuit for receiving a digital camera signal obtained through an A/D conversion of an analog camera signal which is outputted by an image sensor, and for performing a digital signal processing so as to produce a luminance signal and a color signal, said video signal processing circuit, comprising: gamma correction means for gamma-correcting luminance data after Y/C separation; and knee correction means, operably coupled to said gamma correction means, provided at a succeeding stage of said gamma correction means, wherein said knee correction means has an input/output characteristic which is: (a) a first linear line with a first incline within a first range where an input level is low, and (b) a second linear line with a second incline smaller than said first incline within a second range where the input level is larger than that of said first range.
References Cited (Backward Citations)
US4302776A
Cited
US4660081A
Cited
US4661987A
Cited
JPS62157474A
Cited
JPS63193772A
Cited
US4774581A
Cited
US4862270A
Cited
US5083208A
Cited
US5008739A
Cited
US5008752A
Cited
US5134487A
Cited
US5148281A
Cited
JPH04284068A
Cited
JPH04319871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-27 | 1997-12-27 | 1998-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-27 | 2001-12-27 | 2002-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-27 | 2005-12-27 | 2006-06-28 | $7700.00 | Window Closed / Lapsed |