US4949166A
Expired / Lapsed
US
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Apparatus for combining and separating constituent components of a video signal
Assignee: General Electric Co
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Filing: 1988-10-03
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Granted: 1990-08-14
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Expires: 2008-10-03
Abstract
Abstract The luminance component of a video signal is processed to produce a luminance component with groups of mutually exclusive spatially correlated image pixels of identical value within each group. In one embodiment each group comprises vertically averaged pixels 1H apart within a field. In another embodiment each group comprises vertically averaged pixels apart within a frame. The chrominance component is similarly processed. The processed luminance and chrominance components are combined using an invertible algorithm involving additive and subtractive signal combination. At a decoder, the inverse of the combining algorithm is used to separate the combined signal into its constitutent luminance and chrominance component parts, without luminance-chrominance crosstalk.
Inventors
- 👤 Michael A. Isnardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:28
CPC Classifications
H; H04; H04N; H04N11/00; H04N9/00; H04N9/77; H04N9/78; H04N11/24
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
134 words
A system for encoding video signal luminance and chrominance information, comprising: means for providing processed luminance information, exclusive of chrominance information, with groups of mutually exclusive correlated image information pixels of identical value within each group, said pixels within each group being separated by an odd number of image scanning lines within an image frame; means for providing processed chrominance information, exclusive of luminance information, with groups of mutually exclusive correlated image information pixels of identical value within each group, said pixels within each group being separated by an odd number of image scanning lines within an image frame, said chrominance information exhibiting opposite phase from one image scanning line to the next; and means for combining said processed luminance and chrominance information with an invertible algorithm to produce a combined encoded video signal.
Claim 2
Independent Claim
134 words
A system for encoding video signal luminance and chrominance information, comprising: means for providing processed luminance information, exclusive of chrominance information, with groups of mutually exclusive correlated image information pixels of identical value within each group, said pixels within each group being separated by an odd number of image scanning lines within an image frame; means for providing processed chrominance information, exclusive of luminance information, with groups of mutually exclusive correlated image information pixels of identical value within each group, said pixels within each group being separated by an odd number of image scanning lines within an image frame, said chrominance information exhibiting opposite phase from one image scanning line to the next; and means for combining said processed luminance and chrominance information with an invertible algorithm to produce a combined encoded video signal.
Claim 3
Dependent Claim
33 words
A system according to claim 1, wherein: said groups of luminance information pixels and said groups of chrominance information pixels respectively contain information obtained from pixels separated by one image scanning line (1H).
Claim 4
Dependent Claim
43 words
A system according to claim 2, wherein: said means for providing processed chrominance information and said means for providing processed luminance information each include means for replacing original pixel values with pixel values obtained by averaging pixels 1H apart in a scanning field.
Claim 5
Dependent Claim
32 words
A system according to claim 1, wherein: said groups of luminance information pixels and said groups of chrominance information pixels respectively contain information obtained from pixels separated by 263H within a frame.
Claim 6
Dependent Claim
37 words
A system according to claim 4, wherein: said identical value for said pixels within each respective group is obtained by replacing original pixel values with pixel values obtained by averaging pixels 263H apart within an image frame.
Claim 7
Dependent Claim
21 words
A system according to claim 1, wherein: said processed luminance information includes high frequency luminance information exclusive of low frequency information.
Claim 8
Dependent Claim
20 words
A system according to claim 6, wherein: said processed high frequency luminance information is substantially exclusive of vertical detail information.
Claim 9
Dependent Claim
23 words
A system according to claim 1, and further including: means for modulating a chrominance subcarrier with chrominance information to produce said opposite phase.
Claim 10
Dependent Claim
45 words
A system according to claim 8, wherein: said combined encoded video signal includes (a) said processed chrominance information including said modulated chrominance subcarrier, (b) said processed luminance information containing high frequency information exclusive of low frequency luminance information, and (c) said low frequency luminance information.
Claim 11
Dependent Claim
53 words
A system for receiving the combined encoded signal of claim 1, comprising: means employing the inverse of said invertible algorithm for separating said combined encoded video signal into its constituent processed luminance and processed chrominance components; and means for conveying said separated processed luminance and chrominance components to an image signal processing channel.
Claim 12
Dependent Claim
53 words
A system according to claim 10, further comprising: frequency selective means for separating said received combined encoded signal into low and high frequency components; and means for conveying said separated high frequency component to said separating means for obtaining said constituent processed luminance and processed chrominance components from said separated high frequency component.
Claim 13
Dependent Claim
115 words
A decoder system for receiving a video signal having a luminance component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, combined with a chrominance component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, said chrominance component exhibiting opposite phase from one image scanning line to the next; said system comprising: means for separating said combined luminance and chrominance components; and means for conveying said separated luminance and chrominance components to an image signal processing channel.
Claim 14
Dependent Claim
115 words
A decoder system for receiving a video signal having a luminance component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, combined with a chrominance component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, said chrominance component exhibiting opposite phase from one image scanning line to the next; said system comprising: means for separating said combined luminance and chrominance components; and means for conveying said separated luminance and chrominance components to an image signal processing channel.
Claim 15
Dependent Claim
22 words
A system according to claim 12, wherein: said separating means includes means for summing and differencing pixel groups a scanning line apart.
Claim 16
Dependent Claim
28 words
A system according to claim 12, wherein: said separating means includes means for summing and differencing pixel groups 263 H apart, where H is a scanning line interval.
Claim 17
Dependent Claim
55 words
A system according to claim 12 and further comprising: frequency selective means for separating said received video signal having said luminance and chrominance components into low and high frequency components; and means for conveying said high frequency component from said frequency selective means to said separating said high frequency component into luminance and chrominance components.
Claim 18
Dependent Claim
58 words
A system according to claim 15 and further comprising: means for combining said separated luminance component from said separating means with said low frequency component from said frequency selective means to produce a combined signal; luminance signal processing means for receiving said combined signal; and chrominance signal processing means for receiving said chrominance component from said separating means.
Claim 19
Dependent Claim
16 words
A system according to claim 16, wherein: said chrominance signal processing means includes chrominance demodulating means.
Claim 20
Independent Claim
128 words
A system for encoding first and second components of a video signal, comprising: means for providing a processed first component, exclusive of said second component, with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame; means for providing a processed second component, exclusive of said first component, with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, said second component exhibiting opposite phase from one image scanning line to the next; and means for combining said processed first and second components with an invertible algorithm to produce a combined encoded video signal.
Claim 21
Independent Claim
128 words
A system for encoding first and second components of a video signal, comprising: means for providing a processed first component, exclusive of said second component, with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame; means for providing a processed second component, exclusive of said first component, with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, said second component exhibiting opposite phase from one image scanning line to the next; and means for combining said processed first and second components with an invertible algorithm to produce a combined encoded video signal.
Claim 22
Dependent Claim
37 words
A system according to claim 18, wherein: said first component groups of image information pixels and said second component groups of image information pixels respectively contain information obtained from pixels separated by one image scanning line (1H).
Claim 23
Dependent Claim
43 words
A system according to claim 19, wherein: said means for providing processed chrominance information and said means for providing processed luminance information each include means for replacing original pixel values with pixel values obtained by averaging pixels 1H apart in a scanning field.
Claim 24
Dependent Claim
28 words
A system according to claim 18, wherein: said first component groups and said second component groups respectively contain information obtained from pixels separated by 263H within a frame.
Claim 25
Dependent Claim
43 words
A system according to claim 21, wherein: said means for providing processed chrominance information and said means for providing processed luminance information each include means for replacing original pixel values with pixel values obtained by averaging pixels 263H apart within an image frame.
Claim 26
Dependent Claim
22 words
A system according to claim 18, wherein: said processed first component includes high frequency information exclusive of low frequency information. information. 2/
Claim 27
Dependent Claim
24 words
A system according to claim 18, and further including: means for modulating a carrier signal with said second component to produce said opposite phase.
Claim 28
Dependent Claim
42 words
A system according to claim 24, wherein: said combined encoded video signal includes (a) said processed second component including said modulated carrier, (b) said processed first component containing high frequency information exclusive of low frequency information, and (c) said low frequency information.
Claim 29
Dependent Claim
50 words
A system for receiving the combined encoded signal of claim 18, comprising: means employing the inverse of said invertible algorithm for separating said combined encoded video signal into its constituent processed first and processed second components; and means for conveying said separated processed components to an image signal processing channel.
Claim 30
Independent Claim
113 words
A system for receiving a video signal having a first component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, combined with a second component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, said second component exhibiting opposite phase from one scanning line to the next; said system comprising: means for separating said combined first and second components; and means for conveying said separated first and second components to an image signal processing channel.
Claim 31
Independent Claim
113 words
A system for receiving a video signal having a first component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, combined with a second component with groups of mutually exclusive correlated image information pixels of identical value within each group separated by an odd number of image scanning lines within an image frame, said second component exhibiting opposite phase from one scanning line to the next; said system comprising: means for separating said combined first and second components; and means for conveying said separated first and second components to an image signal processing channel.
Claim 32
Dependent Claim
22 words
A system according to claim 27, wherein: said separating means includes means for summing and differencing pixel groups a scanning line apart.
Claim 33
Dependent Claim
27 words
A system according to claim 27, wherein: said separating means includes means for summing and differencing pixel groups 263H apart, where H is a scanning line interval.
Claim 34
Dependent Claim
57 words
A system according to claim 27, and further comprising: frequency selective means for separating said received video signal having said combined first and second components into low and high frequency components; and means for conveying said combined high frequency component to said separating means for providing a separated high frequency first component and a separated second component.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |